BENCHMARQ MICROELECTRONICS INC
8-K, 1998-03-03
SEMICONDUCTORS & RELATED DEVICES
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<PAGE>
 
                      SECURITIES AND EXCHANGE COMMISSION

                             Washington, D.C. 20549

                               _________________


                                    FORM 8-K

                                 CURRENT REPORT


                     Pursuant to Section 13 or 15(d) of the
                        Securities Exchange Act of 1934

                                 MARCH 2, 1998
                                 Date of Report
                       (Date of earliest event reported)


                        BENCHMARQ Microelectronics, Inc.
             (Exact name of registrant as specified in its charter)
 

          Delaware                     0-27232               74-2532442
(State or other jurisdiction of      (Commission          (I.R.S. Employer
incorporation or organization)       File Number)       Identification Number)
 

                            17919 WATERVIEW PARKWAY
                                 DALLAS, TEXAS
                    (Address of principal executive offices)

                                     75252
                                   (Zip Code)

                                 (972) 437-9195
               (Company's telephone number, including area code)
<PAGE>
 
ITEM 5.  OTHER EVENTS.

     BENCHMARQ Microelectronics, Inc., a Delaware corporation (the "Company"),
and Unitrode Corporation, a Maryland corporation (the "Parent"), and Merrimack
Corporation, a Delaware corporation and a wholly owned subsidiary of the Parent
("Newco"), entered into an Agreement and Plan of Merger, dated as of March 2,
1998 (the "Merger Agreement"), pursuant to which Newco will be merged (the
"Merger") with and into the Company.  The Company will be the surviving entity
resulting from the Merger and become a wholly owned subsidiary of the Parent.

     Upon consummation of the Merger, each share of the Company's common stock,
par value $0.001 per share (the "Company Common Stock"), (excluding stock held
by the Company, the Parent, or any of their respective subsidiaries) issued and
outstanding at the effective time of the Merger (the "Effective Time") shall
cease to be outstanding and shall be converted into and exchanged for the right
to receive one share of the Parent's common stock, par value $.01 per share (the
"Parent Common Stock"), and the associated preferred stock purchase right
(subject to possible adjustment as described below, the "Exchange Ratio").  In
the event the mean high and low per share trading price for the Parent Common
Stock during the twenty (20) consecutive trading days ending on the tenth day
prior to the meeting of the Company's stockholders to vote upon approval of the
Merger and the Merger Agreement (as reported on the New York Stock Exchange)
(the "Pre-Closing Average") is less than $16.00 per share the Exchange Ratio
will be obtained by dividing $16.00 by the Pre-Closing Average provided that the
exchange ratio will in no event be higher than 1.33. In the event the Pre-
Closing Average is greater than $24.00 per share the Exchange Ratio will be
obtained by dividing $24.00 by the Pre-Closing Average.

     The parties anticipate that the Merger will be completed in the second
quarter of 1998.

     The Merger is intended to (i) qualify as a reorganization (within the
meaning of Section 368(a) of the Internal Revenue Code of 1986, as amended) and
(ii) for financial accounting purposes, be accounted for as a "pooling of
interests."

     Consummation of the Merger is subject to various conditions, including:
(i) receipt of the approval by the stockholders of the Company of the Merger
Agreement and the Merger; (ii) receipt of the approval by the stockholders of
the Parent of the issuance of the Parent Common Stock under the Merger
Agreement; (iii) expiration or early termination of the waiting period imposed
by the Hart-Scott-Rodino Antitrust Improvements Act of 1976; (iv) receipt of an
opinion of legal counsel as to the tax treatment of certain aspects of the
Merger; (v) receipt of advice by the Parent and the Company in writing by
Coopers & Lybrand L.L.P. and Ernst and Young LLP, respectively, as of the date
upon which the Effective Time is to occur to the effect that such firm knows

                                      -1-
<PAGE>
 
of no reason that the Merger cannot be treated for financial accounting purposes
as a "pooling of interests" under GAAP; and (vii) satisfaction of certain other
conditions.

     The Merger Agreement may be terminated at any time prior to the Effective
Time, whether before or after approval of the Merger Agreement and the Merger by
the stockholders of the Company: (i) by the mutual consent of the Company and
the Parent; (ii) by the Company, if the Parent breaches the Merger Agreement and
fails to cure such breach; (iii) by the Parent, if the Company breaches the
Merger Agreement and fails to cure such breach; (iv) by either the Parent or the
Company, if there is an order of a court or governmental entity which is final
and nonappealable permanently enjoining, restraining or prohibiting the
consummation of the Merger, unless the party relying on such order has not
complied with certain obligations as set forth in the Merger Agreement; (v) with
certain exceptions, by either the Parent or the Company, if the Merger has not
been consummated before October 31, 1998; (vi) by either the Parent or the
Company, if the Merger Agreement fails to receive the requisite vote for
approval and adoption by the stockholders of the Company; (vii) by either the
Parent or the Company if the issuance of the Parent Common Stock pursuant to the
Merger Agreement fails to receive the requisite vote for approval by the
stockholders of the Parent; (viii) by the Company if the Pre-Closing Average
falls below $12.00; (ix) by the Parent, if the Board of Directors of the Company
(a) fails to recommend approval and adoption of the Merger Agreement and the
Merger by the stockholders of the Company or withdraws or modifies (or publicly
announces an intention to withdraw or modify) in any adverse manner its approval
or recommendation of the Merger Agreement or the Merger; (b) makes any
recommendation with respect to any Acquisition Proposal (as defined in the
Merger Agreement) by a third party other than a recommendation to reject such
Acquisition Proposal; (c) takes any action with respect to soliciting or
facilitating an Acquisition Proposal; or (d) resolves to do any of the
foregoing; or (x) by the Company, if the Board of Directors of the Parent fails
to recommend approval of the issuance of shares of Parent Common Stock pursuant
to the Merger Agreement by the stockholders of the Parent or withdraws or
modifies (or publicly announces an intention to withdraw or modify) its approval
and recommendation in a manner materially adverse to the Company or shall have
resolved to do any of the foregoing.

     In the event of the termination of the Merger Agreement (as set forth
above), the Merger Agreement will become void, and there will be no liability on
the part of the Parent, Newco or the Company or any of their respective officers
or directors to the other and all rights and obligations of any party thereto
will cease, except as otherwise provided in the Merger Agreement.  If the Merger
Agreement is terminated (i) by the Parent (unless the Company could terminate
the Agreement because the Pre-Closing Average is below $12.00) because the Board
of Directors of the Company (a) fails to recommend approval and adoption of the
Merger Agreement and the Merger by the stockholders of the Company or withdraws
or modifies (or publicly announces an intention to withdraw or modify) in any
adverse manner its approval or recommendation of the Merger Agreement or the
Merger; (b) makes any recommendation with respect to any Acquisition Proposal

                                      -2-
<PAGE>
 
other than a recommendation to reject such Acquisition Proposal; (c) takes any
action with respect to soliciting or facilitating an Acquisition Proposal; (d)
enters into any agreement relating to an Acquisition Proposal other than the
Merger Agreement or the Option Agreement; or (e) resolves to do any of the
foregoing; or (ii) by the Parent or Company pursuant to the Merger Agreement
because of the failure to obtain the required approval from the Company
stockholders and at the time of such termination or prior to the Company's
stockholders' meeting there has been an Acquisition Proposal (whether or not
such Acquisition Proposal shall have been rejected or shall have been withdrawn
prior to the time of such termination or of the Company stockholders' meeting);
or (iii) by the Parent as a result of the Company's material breach of certain
obligations of the Company to facilitate the consummation of the Merger, the
Company shall promptly pay the Parent by wire transfer of same day funds not
later than two business days after the date of such termination a termination
fee of $4,528,000 (the "Termination Fee") provided, however, that if the Merger
Agreement is terminated by the Parent or the Company pursuant to the Merger
Agreement under the circumstances described in the Merger Agreement and at the
time of such termination the Parent's stockholders shall have failed to approve
the issuance of the Parent Common Stock pursuant to the Merger Agreement, the
Parent shall not be entitled to the Termination Fee.  If the Merger Agreement is
terminated by the Company pursuant to the Merger Agreement and at the time of
such termination there has been an Acquisition Proposal for the Parent (whether
or not such offer, proposal, announcement or agreement shall have been rejected
or shall have been withdrawn prior to the time of such termination) and the
stockholders of the Parent shall have failed to approve the issuance of the
Parent Common Stock pursuant to the Merger Agreement, the Parent shall promptly
pay to the Company by wire transfer of same day funds not later than two
business days after the date of such termination a termination fee of
$2,000,000.

     The Merger Agreement will be submitted for approval to the Company's
stockholders, and the issuance of the Parent's Common Stock pursuant to the
Merger Agreement will be submitted to the Parent's stockholders for their
approval.  Prior to the stockholders' meetings, the Parent will file a
registration statement with the Securities and Exchange Commission registering
under the Securities Act of 1933, as amended, the shares of the Parent Common
Stock to be issued in exchange for the outstanding shares of Company Common
Stock.  Such shares of stock of the Parent will be offered to the Company's
stockholders pursuant to a prospectus that also will serve as a proxy statement
for the Company's stockholders' meeting and the Parent's stockholders' meeting.

     In connection with the execution of the Merger Agreement, the Company and
the Parent entered into a Stock Option Agreement ("Option Agreement") pursuant
to which the Company has granted the Parent an option (the "Option") to acquire
up to 955,158 shares of Company Common Stock at an exercise price of $17.53 per
share under the terms of the Option Agreement, a form of which is attached to
the Merger Agreement as Annex B.   The Option only becomes exercisable after the
occurrence of certain events,

                                      -3-
<PAGE>
 
including (i) a person or group commencing a tender offer for 10% or more of the
Company Common Stock, (ii)  if the Company approves, announces or enters into an
agreement to (a) merge the Company or one of its significant subsidiaries with
any entity other than the Parent or one of its subsidiaries or (b) sell or
otherwise dispose of (other than in the ordinary course of business) more than
10% of the Company's assets or voting securities, or (iii) when a person or
group acquires, or acquires the right to, 10% or more of the outstanding Company
Common Stock. The Option and the Option Agreement terminate on the occurrence of
certain events, including (i) at the effective time of the Merger, (ii) if the
Merger Agreement is terminated by either the Company or the Parent because there
is an order of a court or governmental entity that is final and nonappealable
permanently enjoining, restraining or prohibiting the consummation of the
Merger, unless the party relying on such order has not complied with certain
obligations as set forth in the Merger Agreement, (iii) if the Merger Agreement
is terminated by mutual written consent, (iv) if the Company terminates the
Merger Agreement because the Parent breaches the Merger Agreement and fails to
cure such breach, (iv) if the Company terminates the Merger Agreement because
the Board of Directors of the Parent fails to recommend approval of the issuance
of shares of Parent Common Stock pursuant to the Merger Agreement by the
stockholders of the Parent or withdraws or modifies (or publicly announces an
intention to withdraw or modify) its approval and recommendation in a manner
materially adverse to the Company or shall have resolved to do any of the
foregoing, (v) if either the Company or the Parent  terminates the Merger
Agreement because the Merger is not consummated by October 31, 1998 (except
under certain circumstances) if the Company could terminate the Merger Agreement
because the Parent breached the Merger Agreement and failed to cure such breach,
(vi) if either the Company or the Parent terminates the Merger Agreement because
the issuance of the Parent Common Stock pursuant to the Merger Agreement fails
to receive the requisite vote for approval by the stockholders of the Parent,
(vii) the Parent terminates the Merger Agreement because of certain actions
taken by the Company and the Company could terminate the Merger Agreement
because the Pre-Closing Average is below $12.00, and (viii) in all other
instances only if the Merger Agreement is terminated prior to receipt of an
Acquisition  Proposal.

     Until consummation of the Merger or termination of the Merger Agreement,
the Company and the Parent have agreed to certain restrictions upon the conduct
of their respective businesses, including an agreement to operate their
respective businesses in the usual and ordinary course consistent with past
practices.

     Upon consummation of the Merger, (i) Robert J. Richardson (currently
President and Chief Executive Officer of the Parent) will act as Chairman and
Chief Executive Officer of the Parent and Alan R. Schuele (presently President
and Chief Executive Officer of the Company) will act as President and Chief
Operating Officer of the Parent and (ii) the Board of Directors of the Parent
will consist of Robert J. Richardson, Robert L. Gable, Louis E. Lataif and James
T. Vanderslue (each of whom is presently a director of

                                      -4-
<PAGE>
 
the Parent) and L.J. Sevin, Dietrich Erdmann and Alan R. Schuele (each of whom
is presently a director of the Company).

     Also, in connection with the execution of the Merger Agreement, each of the
directors of the Company, but acting solely in their capacity as stockholders of
the Company, executed a Voting Agreement, in the form attached to the Merger
Agreement as Annex A (the "Voting Agreement") which obligates them to vote their
shares of Company Common Stock in favor of the Merger Agreement and against any
other competing transaction.

     The descriptions of the Merger Agreement, Option Agreement and Voting
Agreement is only a summary and is qualified by reference to the entire Merger
Agreement, Option Agreement and Voting Agreement.  For additional information
regarding the Merger Agreement, Option Agreement and Voting Agreement, please
refer to the copies of those documents which are incorporated herein by
reference and included as Exhibits to this Current Report on Form 8-K.

ITEM 7.  FINANCIAL STATEMENT, PRO FORMA FINANCIAL INFORMATION AND EXHIBITS.

     (a) FINANCIAL STATEMENTS OF BUSINESS ACQUIRED.
            NONE

     (b)  PRO FORMA FINANCIAL INFORMATION.
            NONE

     (c)  EXHIBITS.

            EXHIBIT 2.1.   Agreement and Plan of Merger, by and between Unitrode
            -----------                                                       
                           Corporation, Merrimack Corporation and BENCHMARQ
                           Microelectronics, Inc., dated as of March 2, 1998,
                           along with form of Voting Agreement, attached as
                           Annex A and the form of Stock Option Agreement,
                           attached as Annex B.

            EXHIBIT 99.1.  Text of press release, dated March 2, 1998, issued by
            ------------                                                        
                           BENCHMARQ Microelectronics, Inc. and Unitrode
                           Corporation.

                                      -5-
<PAGE>
 
                                   SIGNATURES
                                   ----------

     Pursuant to the requirements of the Securities Exchange Act of 1934, the
registrant has duly caused this report to be signed on its behalf by the
undersigned hereunto duly authorized.


                              BENCHMARQ MICROELECTRONICS, INC.
                              (Company)



Date:  March 2, 1998        By: /s/ ALAN R. SCHUELE
                               -------------------------------------------
                                Alan R. Schuele,
                                President & Chief Executive Officer      

                                      -6-
<PAGE>
 
                               INDEX TO EXHIBITS
                               -----------------


Exhibit
- -------

 2.1      Agreement and Plan of Merger, dated as of March 2, 1998, by and
          between Merrimack Corporation and BENCHMARQ Microelectronics, Inc. and
          joined in by Unitrode Corporation, along with form of Voting
          Agreement, attached as Annex A and the form of Stock Option Agreement,
          attached as Annex B.


 99.1     Text of press release, dated March 2, 1998, issued by BENCHMARQ
          Microelectronics, Inc. and Unitrode Corporation.

<PAGE>
 
                                                                     EXHIBIT 2.1

                          AGREEMENT AND PLAN OF MERGER


                                  BY AND AMONG


                              UNITRODE CORPORATION

 
                             MERRIMACK CORPORATION


                                      AND


                        BENCHMARQ MICROELECTRONICS, INC.


                                 MARCH 2, 1998
<PAGE>
 
                               TABLE OF CONTENTS
                                                                            Page
 
ARTICLE I

    DEFINITIONS
    Section 1.1   Rules of Construction.......................................2
    Section 1.2   Defined Terms...............................................2

ARTICLE II

    TERMS OF MERGER
    Section 2.1   Statutory Merger...........................................12
    Section 2.2   Effective Time.............................................13
    Section 2.3   Effect of the Merger.......................................13
    Section 2.4   Certificate of Incorporation; Bylaws.......................13
    Section 2.5   Directors and Officers.....................................13
 
ARTICLE III

    CONVERSION OF SECURITIES; EXCHANGE OF CERTIFICATES
    Section 3.1   Merger Consideration; Conversion and Cancellation
                  of Securities..............................................13
    Section 3.2   Adjustments to the Exchange Ratio..........................14
    Section 3.3   Exchange of Certificates...................................14
    Section 3.4   Closing....................................................17
    Section 3.5   Stock Transfer Books.......................................17
    Section 3.6   No Fractional Shares.......................................17
 
ARTICLE IV

    REPRESENTATIONS AND WARRANTIES OF THE COMPANY
    Section 4.1   Organization and Qualification; Subsidiaries...............18
    Section 4.2   Certificate of Incorporation; Bylaws.......................18
    Section 4.3   Capitalization.............................................18
    Section 4.4   Authorization of Agreement.................................20
    Section 4.5   Approvals..................................................20
    Section 4.6   No Violation...............................................20
    Section 4.7   Reports....................................................21
    Section 4.8   No Material Adverse Effect; Conduct........................22
    Section 4.9   Title to Properties........................................22
    Section 4.10  Certain Obligations........................................23
    Section 4.11  Permits; Compliance........................................23
    Section 4.12  Litigation; Compliance with Laws...........................23
    Section 4.13  Information in Disclosure Documents and Registration
                  Statement..................................................23
<PAGE>
 
    Section 4.14  Employee Plans; Collective Bargaining Agreements...........24
    Section 4.15  Taxes......................................................28
    Section 4.16  Environmental Matters......................................29
    Section 4.17  Intellectual Property......................................29
    Section 4.18  Insurance..................................................30
    Section 4.19  Pooling; Tax Matters.......................................30
    Section 4.20  Affiliates.................................................30
    Section 4.21  Brokers....................................................30
    Section 4.22  Opinion of Financial Advisor...............................30
                                                      
ARTICLE V

    REPRESENTATIONS AND WARRANTIES OF ACQUIROR
    Section 5.1   Organization and Qualification; Subsidiaries...............31
    Section 5.2   Articles of Incorporation; Bylaws..........................31
    Section 5.3   Capitalization.............................................31
    Section 5.4   Authorization of Agreement.................................32
    Section 5.5   Approvals..................................................33
    Section 5.6   No Violation...............................................33
    Section 5.7   Reports....................................................34
    Section 5.8   No Material Adverse Effect; Conduct........................34
    Section 5.9   Litigation; Compliance with Laws...........................35
    Section 5.10  Information in Disclosure Documents and Registration
                  Statement..................................................35
    Section 5.11  Pooling; Tax Matters.......................................35
    Section 5.12  Affiliates.................................................36
    Section 5.13  Brokers....................................................36
    Section 5.14  Opinion of Financial Advisor...............................36
    Section 5.15  Operations of Newco........................................36
    Section 5.16  Proposal to Acquire the Acquiror...........................36
     
ARTICLE VI

    COVENANTS
    Section 6.1   Affirmative Covenants......................................36
    Section 6.2   Negative Covenants.........................................37
    Section 6.3   No Solicitation............................................42
    Section 6.4   Access and Information.....................................42
 
ARTICLE VII

    ADDITIONAL AGREEMENTS
    Section 7.1   Meeting of Stockholders....................................43
    Section 7.2   Registration Statement; Proxy Statements...................44
<PAGE>
 
    Section 7.3   Appropriate Action; Consents; Filings......................45
    Section 7.4   Affiliates; Pooling; Tax Treatment.........................47
    Section 7.5   Public Announcements.......................................47
    Section 7.6   Stock Exchange Listing.....................................47
    Section 7.7   Employee Benefit Plans.....................................48
    Section 7.8   Indemnification of Directors and Officers..................48
    Section 7.9   Newco......................................................50
    Section 7.10  Event Notices..............................................50
    Section 7.11  Assumption of Obligations to Issue Stock...................50
    Section 7.12  Real Estate Transfer Tax Returns...........................51
    Section 7.13  Acquiror's Board of Directors and Officers.................51
 
ARTICLE VIII

    CLOSING CONDITIONS
    Section 8.1   Conditions to Obligations of Each Party Under This
                  Agreement..................................................52
    Section 8.2   Additional Conditions to Obligations of the Acquiror
                  Companies..................................................53
    Section 8.3   Additional Conditions to Obligations of the Company........53
 
ARTICLE IX

    TERMINATION, AMENDMENT AND WAIVER
    Section 9.1   Termination................................................54
    Section 9.2   Effect of Termination......................................56
    Section 9.3   Amendment..................................................57
    Section 9.4   Waiver.....................................................57
    Section 9.5   Expenses...................................................57
 
ARTICLE X

    GENERAL PROVISIONS
    Section 10.1  Effectiveness of Representations, Warranties and
                  Agreements.................................................57
    Section 10.2  Notices....................................................58
    Section 10.3  Headings...................................................59
    Section 10.4  Severability...............................................59
    Section 10.5  Entire Agreement...........................................59
    Section 10.6  Assignment.................................................59
    Section 10.7  Parties in Interest........................................59
    Section 10.8  Failure or Indulgence Not Waiver; Remedies Cumulative......60
    Section 10.9  Governing Law..............................................60
    Section 10.10 Counterparts...............................................60
<PAGE>
 
                                    ANNEXES
                                    -------

Annex A   Form of Voting Agreement
Annex B   Stock Option Agreement
Annex C   Affiliate's Agreement (BENCHMARQ Affiliates)
Annex D   Affiliate's Agreement (Unitrode Affiliates)
<PAGE>
 
                          AGREEMENT AND PLAN OF MERGER


     THIS AGREEMENT AND PLAN OF MERGER, dated as of March 2, 1998 is by and
among Unitrode Corporation, a Maryland corporation (the "Acquiror"), Merrimack
Corporation, a Delaware corporation and a wholly-owned subsidiary of Acquiror
("Newco"), and BENCHMARQ Microelectronics, Inc., a Delaware corporation (the
"Company").  The Acquiror and Newco are sometimes referred to herein as the
"Acquiror Companies."

                                   RECITALS:
                                        
     The Board of Directors of the Company has determined that the business
combination to be effected by means of the Merger (as defined herein) is
consistent with and in furtherance of the long-term strategic interests of the
Company and is fair to, and in the best interests of, the Company and its
stockholders and has approved and adopted this Agreement (as defined herein) and
recommends approval and adoption of this Agreement by the stockholders of the
Company.

     The Board of Directors of the Acquiror has determined that the business
combination to be effected by means of the Merger is consistent with and in
furtherance of the long-term strategic interests of the Acquiror and in the best
interests of, the Acquiror and its stockholders and has approved this Agreement
and recommends approval by the stockholders of the Acquiror of the issuance of
shares of the common stock, $.01 par value, of the Acquiror (the "Acquiror
Common Stock") contemplated by the Merger.

     The Board of Directors of Newco has determined that the business
combination to be effected by means of the Merger is advisable, and in the best
interests of, Newco and its stockholder and has approved and adopted this
Agreement.  The stockholder of Newco has approved and adopted this Agreement.

     Concurrently with the execution and delivery of this Agreement, as an
essential condition and inducement to the willingness of the Acquiror and Newco
to enter into this Agreement, certain holders of common stock, par value $.001
per share, of the Company  ("Company Common Stock") have each entered into a
Voting Agreement (the "Voting Agreement") in the form attached as Annex A dated
as of the date hereof pursuant to which such holders have agreed to vote their
shares of Company Common Stock in the manner set forth therein.

     Concurrently with the execution and delivery of this Agreement, as an
essential condition and inducement to the willingness of the Acquiror and Newco
to enter into this Agreement, the Company has entered into a Stock Option
Agreement (the "Option Agreement") in the form attached hereto as Annex B dated
as of the date hereof granting the Acquiror an irrevocable option to purchase up
to 955,158 shares of the Company Common Stock on the terms and subject to the
conditions set forth therein.

     Upon the terms and subject to the conditions of this Agreement and in
accordance with the Delaware General Corporation Law (the "DGCL"), Newco will
merge with and into the Company
<PAGE>
 
(the "Merger") and the Company will continue as the surviving corporation (the
"Surviving Corporation").

     For U.S. federal income tax purposes, it is intended that the Merger will
qualify as a reorganization within the meaning of the provisions of Section
368(a) of the Internal Revenue Code of 1986, as amended (the "Code"), and that
this Agreement shall be, and is hereby, adopted as a plan of reorganization for
purposes of Section 368(a) of the Code.

     The Merger is intended to be treated as a "pooling of interests" for
accounting purposes.

     NOW, THEREFORE, in consideration of the foregoing and the respective
representations, warranties, covenants and agreements set forth in this
Agreement, and intending to be legally bound hereby the parties hereto agree as
follows:


                                   ARTICLE I

                                  DEFINITIONS

      Section 1.1   Rules of Construction.  Unless the context otherwise
                    ---------------------                               
requires, as used in this Agreement:  (a) a term has the meaning ascribed to it;
(b) an accounting term not otherwise defined has the meaning ascribed to it in
accordance with GAAP as in effect from time to time; (c) "or" is not exclusive
unless the context requires otherwise; and (d) "including" means "including
without limitation".

      Section 1.2   Defined Terms. For all purposes in this Agreement, the
                    -------------                                         
following terms shall have the respective meanings set forth in this Section 1.2
                                                                     -----------
(such definitions to be equally applicable to both the singular and plural forms
of the terms herein defined).

     "Acquiror Rights" will mean rights to purchase shares of the preferred
stock of the Acquiror pursuant to that certain Rights Agreement, between
Acquiror and The First National Bank of Boston dated as of May 2, 1990, and as
amended as of April 30, 1993.

     "Acquiror Stock Options" will mean stock options granted pursuant to the
1983 Stock Option Plan, the Amended and Restated 1986 Non-Employee Director
Option Plan and the 1992 Employee Stock Option Plan, as amended.

     "Acquiror's Audited Consolidated Financial Statements" will mean the
consolidated balance sheets of the Acquiror and its Subsidiaries and the related
consolidated statements of income, stockholders equity and cash flows, together
with the notes thereto, all as audited by Coopers & Lybrand L.L.P., independent
accountants, under their report with respect thereto dated February 27, 1997 and
included in the Acquiror's Annual Report on Form 10-K for the year ended January
31, 1997 filed with the Commission.

                                       2
<PAGE>
 
     "Acquiror's Consolidated Balance Sheet" will mean the consolidated balance
sheet of the Acquiror as of January 31, 1997, included in the Acquiror's Audited
Consolidated Financial Statements.

     "Acquiror's Consolidated Financial Statements" will mean the Acquiror's
Audited Consolidated Financial Statements and the Acquiror's Unaudited
Consolidated Financial Statements.

     "Acquiror's Disclosure Letter" will mean a letter of even date herewith
delivered by the Acquiror to the Company with the execution of the Agreement,
which, among other things, will identify exceptions to the Acquiror's
representations and warranties contained in Article V by specific section and
                                            ---------                        
subsection references.

     "Acquiror's Stockholders' Meeting" shall have the meaning ascribed to such
term in Subsection 7.1(b) hereof.

     "Acquiror's Unaudited Consolidated Financial Statements" will mean the
unaudited consolidated balance sheet of the Acquiror and its Subsidiaries as of
November 1, 1997 and the related consolidated statements of income, stockholders
equity and cash flows for the fiscal quarters ended October 31, 1996 and
November 1, 1997, together with the notes thereto, included in the Acquiror's
Quarterly Report on Form 10-Q for the quarter ended November 1, 1997 filed with
the Commission.

     "Acquisition Proposal" will mean any offer, proposal or indication of
interest (other than by or with the Acquiror or any of its Subsidiaries):

     (a)  by any Person to commence (as such term is defined in Rule 14d-2 under
the Exchange Act), or file a registration statement under the Securities Act
with respect to, a tender offer or exchange offer to purchase any shares of
Company Common Stock such that, upon consummation of such offer, such Person
would own or control more than 15% of the then outstanding Company Common Stock;
or

     (b)  relating to (A) a merger, reorganization, consolidation, share
exchange or other business combination or similar transaction involving the
Company or any of its Significant Subsidiaries, (B) a sale, lease, exchange,
mortgage, pledge, transfer or other disposition of assets of the Company or its
Subsidiaries representing 15% or more of the consolidated assets of the Company,
directly or indirectly, in one or a series of transactions other than in the
ordinary course of business; (C) an issuance, sale or other acquisition or
disposition of (including by way of merger, consolidation, share exchange or any
similar transaction) securities (or options, rights or warrants to purchase, or
securities convertible into or exchangeable for, such securities) representing
15% or more of the voting power of the Company or any of its Significant
Subsidiaries, directly or indirectly, in one or a series of transactions or (D)
a transaction in which any Person shall or would acquire beneficial ownership
(as such term is defined in Rule 13d-3 under the Exchange Act), or the right to
acquire beneficial ownership, or any "group" (as such term is defined under the
Exchange Act) shall have

                                       3
<PAGE>
 
been formed which beneficially owns or would own or has or would have the right
to acquire beneficial ownership, of 15% or more of the outstanding Company
Common Stock.

     "Acquiror Acquisition Proposal" will mean any offer, proposal or indication
of interest (other than by or with the Company or any of its Subsidiaries):

     (a)  by any Person to commence (as such term is defined in Rule 14d-2 under
the Exchange Act), or file a registration statement under the Securities Act
with respect to, a tender offer or exchange offer to purchase any shares of
Acquiror Common Stock such that, upon consummation of such offer, such Person
would own or control more than 15% of the then outstanding Acquiror Common
Stock; or

     (b)  relating to (A) a merger, reorganization, consolidation, share
exchange or other business combination or similar transaction involving the
Acquiror or any of its Significant Subsidiaries, (B) a sale, lease, exchange,
mortgage, pledge, transfer or other disposition of assets of the Acquiror or its
Subsidiaries representing 15% or more of the consolidated assets of the
Acquiror, directly or indirectly, in one or a series of transactions other than
in the ordinary course of business; (C) an issuance, sale or other acquisition
or disposition of (including by way of merger, consolidation, share exchange or
any similar transaction) securities (or options, rights or warrants to purchase,
or securities convertible into or exchangeable for, such securities)
representing 15% or more of the voting power of the Acquiror or any of its
Significant Subsidiaries, directly or indirectly, in one or a series of
transactions or (D) a transaction in which any person shall or would acquire
beneficial ownership (as such term is defined in Rule 13d-3 under the Exchange
Act), or the right to acquire beneficial ownership, or any "group" (as such term
is defined under the Exchange Act) shall have been formed which beneficially
owns or would own or has or would have the right to acquire beneficial
ownership, of 15% or more of the outstanding Acquiror Common Stock.

     "Affiliate" will, with respect to any Person, mean any other Person that
controls, is controlled by or is under common control with the former.

     "Agreement" will mean this Agreement and Plan of Merger made and entered
into as of March 2, 1998 among Acquiror, Newco and the Company, including any
amendments hereto and each Annex hereto.

     "Benefit Arrangement" will mean any employment, consulting, severance or
other similar contract, arrangement or policy and each plan, arrangement
(written or oral), program, agreement or commitment providing for insurance
coverage (including without limitation any self-insured arrangements), workers'
compensation, disability benefits, supplemental unemployment benefits, vacation
benefits, retirement benefits, life, health, disability or accident benefits
(including without limitation any "voluntary employees' beneficiary association"
as defined in section 501(c)(9) of the Code providing for the same or other
benefits) or for deferred compensation, profit-sharing bonuses, stock options,
restricted stock, phantom stock, stock appreciation rights, stock purchases or
other forms of incentive compensation or post-retirement insurance, compensation
or benefits which (i) is not a Welfare Plan, Pension Plan or Multiemployer Plan,
(ii) is entered into, maintained,

                                       4
<PAGE>
 
administered, contributed to or required to be contributed to, as the case may
be, by a specified Person, and (iii) covers any employee or former employee of
such Person.

     "Benefit Continuation Period" will have the meaning ascribed to such term
in Subsection 7.7(b) hereof.

     "Business Day" will mean any day other than a day on which banks in the
States of New Hampshire or Texas are authorized or obligated to be closed.

     "CERCLA" will mean the Comprehensive Environmental, Response, Compensation,
and Liability Act of 1980, as amended.

     "Certificate of Merger" will have the meaning ascribed to such term in
Section 2.2 hereof.

     "Closing" will mean a meeting, which will be held in accordance with
                                                                         
Section 3.3, of all Persons interested in the transactions contemplated by the
- -----------                                                                   
Agreement at which all documents deemed necessary by the parties to the
Agreement to evidence the fulfillment or waiver of all conditions precedent to
the consummation of the transactions contemplated by the Agreement are executed
and delivered.

     "Closing Date" will mean the date of the Closing as determined pursuant to
                                                                               
Section 3.3.
- ----------- 

     "COBRA" means the Consolidated Omnibus Budget Reconciliation Act of 1985,
as amended, and the Regulations promulgated thereunder.
 
     "Commission" will mean the Securities and Exchange Commission.

     "Company Option Plans" will mean collectively the 1989 Stock Option Plan
and the 1995 Flexible Stock Option Plan.

     "Company Stock Options" will mean options granted pursuant to the Company
Option Plans.

     "Company Stockholders' Meeting" will have the meaning ascribed to such term
in Subsection 7.1(a).
   ----------------- 

     "Company's Audited Consolidated Financial Statements" will mean the
consolidated balance sheets of the Company and its Subsidiaries and the related
consolidated statements of income, stockholders equity and cash flows, together
with the notes thereto, all as audited by Ernest & Young L.L.P., independent
accountants, under their report with respect thereto dated February 18, 1997,
and included in the Company's Annual Report on Form 10-K for the fiscal year
ended December 31, 1996 filed with the Commission.

                                       5
<PAGE>
 
     "Company's Consolidated Balance Sheet" will mean the consolidated balance
sheet of the Company as of December 31, 1996, included in the Company's Audited
Consolidated Financial Statements.

     "Company's Consolidated Financial Statements" will mean the Company's
Audited Consolidated Financial Statements and the Company's Unaudited
Consolidated Financial Statements.

     "Company's Disclosure Letter" will mean a letter of even date herewith
delivered by the Company to the Acquiror Companies concurrently with the
execution of the Agreement, which, among other things, will identify exceptions
to the Company's representations and warranties contained in Article IV by
                                                             ----------   
specific section and subsection references.

     "Company's Unaudited Consolidated Financial Statements" will mean the
unaudited consolidated balance sheet of the Company and its Subsidiaries as of
September 30, 1997 and the related consolidated statements of income,
stockholders equity and cash flows for the three month periods and nine month
periods ended September 30, 1996 and September 30, 1997, together with the notes
thereto, included in the Company's Quarterly Report on Form 10-Q for the quarter
ended September 30, 1997 filed with the Commission.

     "control" (including the terms "controlled," "controlled by" and "under
common control with") will mean the possession, directly or indirectly or as
trustee or executor, of the power to direct or cause the direction of the
management or policies of a Person, whether through the ownership of stock or as
trustee or executor, by contract or credit arrangement or otherwise.

     "Court" will mean any court or arbitration tribunal of the United States or
any domestic state, and any political subdivision thereof.

     "Effective Time" will mean the date and time at which the Certificate of
Merger is filed  with the Secretary of State of the State of Delaware in
accordance with Section 2.2.
                ----------- 

     "Employee Plans" will mean all Benefit Arrangements, Multiemployer Plans,
Pension Plans and Welfare Plans.

     "Environmental Law" will mean any and all Laws of  any Governmental
Authority pertaining to human health or the environment currently in effect and
applicable to a specified Person and its Subsidiaries, including without
limitation the Clean Air Act, as amended, CERCLA, the Federal Water Pollution
Control Act, as amended, the Occupational Safety and Health Act of 1970, as
amended, the RCRA, the Safe Drinking Water Act, as amended, the Toxic Substances
Control Act, as amended, the Emergency Planning and Right-to-Know Act, as
amended, the Hazardous Materials Transportation Act, as amended, the Oil
Pollution Act of 1990, as amended, any state or local Laws implementing the
foregoing federal Laws, and all other Laws pertaining to the protection of human
health and the environment (inclusive, in each case, of all regulations issued
thereunder).  For purposes of the Agreement, the terms "hazardous substance" and
"release" have the meanings

                                       6
<PAGE>
 
specified in CERCLA; provided, however, that, to the extent the Laws of the
state or locality in which the property is located establish a meaning for
"hazardous substance" or "release" that is broader than that specified in
CERCLA, such broader meaning will apply within the jurisdiction of such state or
locality, and; provided further, however, the term "hazardous substance" will
include all dehydration and treating wastes, waste (or spilled) oil, and waste
(or spilled) petroleum products, and (to the extent in excess of background
levels) radioactive material, even if such are specifically exempt from
classification as hazardous substances pursuant to CERCLA or RCRA or the
analogous statutes of any jurisdiction applicable to the specified Person or its
Subsidiaries or any of their respective properties or assets.

     "ERISA" will mean the Employee Retirement Income Security Act of 1974, as
amended, and the Regulations promulgated thereunder.

     "ERISA Affiliate" will mean any entity which is (or at any relevant time
was) a member of a "controlled group of corporations" with, under "common
control" with, or a member of an "affiliated service group" with a specified
Person, as such terms are defined in section 414(b), (c), (m) or (o) of the
Code.
 
     "Exchange Act" will mean the Securities Exchange Act of 1934, as amended,
and the Regulations promulgated thereunder.

     "Exchange Agent" will mean a bank or trust company organized under the Laws
of the United States of America or any of the states thereof and having a net
worth in excess of $100 million designated and appointed to act in the
capacities required thereof under Section 3.2.
                                  ----------- 

     "Exchange Fund" will mean the fund of Acquiror Common Stock (and the
associated Acquiror Rights), cash in lieu of fractional share interests and
dividends and distributions, if any, with respect to such shares of Acquiror
Common Stock established at the Exchange Agent pursuant to Section 3.2.
                                                           ----------- 

     "Exchange Ratio" will mean the ratio of conversion of Company Common Stock
into Acquiror Common Stock pursuant to the Merger as provided in the first
sentence of Subsection 3.1(a) as adjusted by Section 3.2.
            -----------------                ----------- 

     "Expenses" will mean all reasonable out-of-pocket expenses (including all
fees and expenses of counsel, accountants, investment bankers, experts and
consultants to a party hereto and its affiliates) incurred by a party or on its
behalf in connection with or related to the authorization, preparation,
negotiation, execution and performance of this Agreement, the preparation,
printing, filing and mailing of the Registration Statement and the Proxy
Statement, the solicitation of stockholder approvals and all other matters
related to the consummation of the transactions contemplated hereby.
 
     "GAAP" will mean generally accepted accounting principles in the United
States consistently applied by a specified Person.

                                       7
<PAGE>
 
     "Governmental Authority" will mean any governmental agency or authority
(other than a Court) of the United States or any domestic state, and any
political subdivision or agency thereof, and will include any authority having
governmental or quasi-governmental powers.
 
     "HSR Act" will mean the Hart-Scott-Rodino Antitrust Improvements Act of
1976, as amended.

     "Indemnification Agreements" will mean the following Indemnification
Agreements: (i) each of the Indemnification Agreements dated April 17, 1991
between the Company and each of (A) Reginald B. McHone, (B) Derrell Coker, (C)
Charles Phipps, (D) L.J. Sevin, (E) Harvey B. Cash, and (F) Dietrich Erdmann;
(ii) the Indemnification Agreement dated December 3, 1997 between the Company
and Alan R. Schuele; (iii) the Indemnification Agreement dated June 30, 1995
between the Company and Jimmie C. Vernon; and (iv) each of the Indemnification
Agreements dated June 29, 1995 between the Company and (A) William F. Davies,
Jr., (B) R. Scott Schaefer, and (C) Jack Kilby.
 
     "IRS" will mean the Internal Revenue Service.

     "Knowledge" will mean, with respect to either the Company or the Acquiror,
the actual knowledge (without duty of inquiry) of any executive officer or any
member of the Board of Directors of such party.

     "Law" will mean all laws, statutes, ordinances and Regulations of the
United States, any foreign country, or any domestic or foreign state, and any
political subdivision or agency thereof, including all decisions of Courts
having the effect of Law in each such jurisdiction.
 
     "Lien" will mean any mortgage, pledge, security interest, encumbrance, lien
or charge of any kind (including any agreement to give any of the foregoing),
any conditional sale or other title retention agreement, any lease in the nature
thereof or the filing of or agreement to give any financing statement under the
Uniform Commercial Code of any jurisdiction.
 
     "Material" will mean material to the condition (financial and other),
results of operations or business of a specified Person and its Subsidiaries, if
any, taken as a whole; provided, however, that, as used in this definition the
word "material" will have the meaning accorded thereto in Section 11 of the
Securities Act.

     "Material Adverse Effect" will mean any change or effect that would be
material and adverse to the consolidated business, condition (financial or
other), operations, performance or properties (but excluding any outstanding
capital stock or other securities) of a specified Person and its Subsidiaries,
if any, taken as a whole; provided, however, that, as used in this definition
the word "material" will have the meaning accorded thereto in Section 11 of the
Securities Act.

     "Material Contract" will mean each contract, lease, indenture, agreement,
arrangement or understanding, whether written or oral, to which a specified
Person or any of its Subsidiaries is a

                                       8
<PAGE>
 
party or to which any of the assets or operations of such specified Person or
any of its Subsidiaries is subject that is of a type that would be required to
be included as an exhibit to a registration statement on Form S-1 promulgated
under the Securities Act pursuant, in the case of the Company, to Paragraph (2),
(4) or (10) of Item 601(b) of Regulation S-K of the Commission and, in the case
of the Acquiror, to Paragraph (10) (other than clause (iii) thereof) of Item
601(b) of Regulation S-K of the Commission if such a registration statement were
to be filed by such Person under the Securities Act on the date of
determination. Notwithstanding the foregoing, such term will, in the case of the
Company, include any of the following contracts, agreements or commitments,
whether oral or written:
 
          (1) any collective bargaining agreement or other agreement with any
     labor union;

          (2) any agreement, contract or commitment with any other Person, other
     than any agency or representation entered in the ordinary course of
     business, containing any covenant limiting the freedom of such specified
     Person or any of its Subsidiaries to engage in any line of business or to
     compete with any other Person;

          (3) any partnership, joint venture or profit sharing agreement with
     any Person, which partnership, joint venture or profit sharing agreement
     generated revenues during its most recently completed fiscal year of
     $100,000 or more;

          (4) any employment or consulting agreement, contract or commitment
     between the Company or any of its Subsidiaries and any employee, officer or
     director thereof (i) having more than one year to run from the date hereof,
     (ii) providing for an obligation to pay or accrue compensation of $100,000
     or more per annum or (iii) providing for the payment or accrual of any
     additional compensation upon a change in control of such Person or any of
     its Subsidiaries or upon any termination of such employment or consulting
     relationship following a change in control of such Person or any of its
     Subsidiaries; and

          (5) any agency or representation agreement with any Person which is
     not terminable by the Company or one of its Subsidiaries without penalty
     upon not more than one year's notice.

     "MGCL" will mean The Maryland General Corporation Law.

     "Multiemployer Plan" will mean any "multiemployer plan," as defined in
Section 4001(a)(3) of ERISA, which (i) is (or was within the six (6) years prior
to the date of this Agreement) entered into, maintained, administered,
contributed to or required to be contributed to, as the case may be, by a
specified Person or any ERISA Affiliate of such Person, and (ii) covers any
employee or former employee of such Person or any ERISA Affiliate of such
Person.

     "NYSE" will mean The New York Stock Exchange.

                                       9
<PAGE>
 
     "Order" will mean any judgment, writ, injunction, order or decree of any
Court or Governmental Authority, federal, foreign, state or local.

     "PBGC" will mean the Pension Benefit Guaranty Corporation.
 
     "Pension Plan" will mean any "employee pension benefit plan" as defined in
Section 3(2) of ERISA (other than a Multiemployer Plan) which (i) is (or was
within the six (6) years prior to the date of this Agreement) entered into,
maintained, administered, contributed to or required to be contributed to, as
the case may be, by a specified Person or any ERISA Affiliate of such Person,
and (ii) covers any employee or former employee of such Person or any ERISA
Affiliate of such Person.

     "Permit" will mean any and all permits, licenses, authorizations, orders,
certificates, registrations or other approvals granted by any Governmental
Authority.

     "Permitted Encumbrances" will mean the following:

          (1) liens for taxes, assessments and other governmental charges not
     delinquent or which are currently being contested  in good faith by
     appropriate proceedings; provided that, in the latter case, the specified
     Person or one of its Subsidiaries will have set aside on its books adequate
     reserves with respect thereto;

          (2) mechanics' and materialmen's liens not filed of record and similar
     charges not delinquent or which are filed of record but are being contested
     in good faith by appropriate proceedings; provided that, in the latter
     case, the specified Person or one of its Subsidiaries will have set aside
     on its books adequate reserves with respect thereto;

          (3) liens in respect of judgments or awards with respect to which the
     specified Person or one of its Subsidiaries is in good faith currently
     prosecuting an appeal or other proceeding for review and with respect to
     which such Person or such Subsidiary has secured a stay of execution
     pending such appeal or such proceeding for review; provided that, such
     Person or such Subsidiary has set aside on its books adequate reserves with
     respect thereto;

          (4) easements, leases, reservations or other rights of others in, or
     minor defects and irregularities in title to, property or assets of a
     specified Person or any of its Subsidiaries; provided that such easements,
     leases, reservations, rights, defects or irregularities do not materially
     impair the use of such property or assets for the purposes for which they
     are held;

          (5) any lien or privilege vested in any lessor or licensor for rent or
     other obligations of a specified Person or any of its Subsidiaries
     thereunder so long as the payment of such rent or the performance of such
     obligations is not delinquent; and

          (6) encumbrances which secure deposits of public funds as required by
     Law.

                                       10
<PAGE>
 
     "Person" will mean an individual, partnership, limited liability company,
corporation, joint stock company, trust, estate, joint venture, association or
unincorporated organization, or any other form of business or professional
entity, but will not include a Governmental Authority.

     "Pre-Closing Average Trading Price" will have the meaning ascribed to such
term in Subsection 3.2(a).
        ----------------- 

     "Proxy Statement" will have the meaning ascribed to such term in Section
4.13 hereof.

     "RCRA" will mean the Resource Conservation and Recovery Act of 1976, as
amended.

     "Registration Statement" will have the meaning ascribed to such term in
Section 4.13 hereof.

     "Regulation" will mean any rule or regulation of any Governmental Authority
having the effect of Law.

     "Reports" will mean, with respect to a specified Person, all reports,
registrations, filings and other documents and instruments required to be filed
by the specified Person or any of its Subsidiaries with any Governmental
Authority (other than the Commission).

     "SEC Reports" will mean (ii all Annual Reports on Form 10-K promulgated
under the Exchange Act, (iv all Quarterly Reports on Form 10-Q promulgated under
the Exchange Act, (vi all proxy statements relating to meetings of stockholders
(whether annual or special), (vi all Current Reports on Form 8-K promulgated
under the Exchange Act and (x) all other reports, schedules, registration
statements or other documents required to be filed during a specified period by
a Person with the Commission pursuant to the Securities Act or the Exchange Act.
 
     "Securities Act" will mean the Securities Act of 1933, as amended, and the
Regulations promulgated thereunder.
 
     "Significant Subsidiary" will mean any Subsidiary of the Company or
Acquiror, as the case may be, that would constitute a Significant Subsidiary of
such party within the meaning of Rule 1-02 of Regulation S-X of the Commission.

     "Stockholders' Meetings" will have the meaning ascribed to such term in
Subsection 7.1(b) hereof.
 
     A "Subsidiary" of a specified Person will be any corporation, partnership,
limited liability company, joint venture or other legal entity of which the
specified Person (either alone or through or together with any other Subsidiary)
owns, directly or indirectly, fifty percent (50%) or more of the stock or other
equity or partnership interests the holders of which are generally entitled to
vote for the election of the board of directors or other governing body of such
corporation, partnership, limited liability company, joint venture or other
legal entity.

                                       11
<PAGE>
 
     "Surviving Corporation" will mean the Company as the corporation surviving
the Merger.

     "Tax Returns" will mean any declaration, return, report, schedule,
certificate, statement or other similar document (including relating or
supporting information) required to be filed with a taxing authority, or where
none is required to be filed with a taxing authority, the statement or other
document issued by a taxing authority in connection with any Tax, including,
without limitation, any information return, claim for refund, amended return or
declaration of estimated Tax.
 
     "Taxes" will mean any and all federal, state, local, foreign, provincial,
territorial or other taxes, imposts, tariffs, fees, levies or other similar
assessments or liabilities and other charges of any kind, including income
taxes, ad valorem taxes, excise taxes, withholding taxes, stamp taxes or other
taxes of or with respect to gross receipts, premiums, real property, personal
property, windfall profits, sales, use, transfers, licensing, employment, social
security, workers' compensation, unemployment, payroll and franchises imposed by
or under any Law; and such terms will include any interest, fines, penalties,
assessments or additions to tax resulting from, attributable to or incurred in
connection with any such tax or any contest or dispute thereof.

     "Terminating Acquiror Breach" shall have the meaning ascribed to such term
in Subsection 9.1(c) hereof.

     "Terminating Company Breach" shall have the meaning ascribed to such term
in Subsection 9.1(b) hereof.

     "Termination Date" shall have the meaning ascribed to such term in
Subsection 9.1(e) hereof.

     "Welfare Plan" will mean any "employee welfare benefit plan" as defined in
Section 3(1) of ERISA, which (i) is entered into, maintained, administered,
contributed to or required to be contributed to, as the case may be, by a
specified Person or any ERISA Affiliate of such Person, and (ii) covers any
employee or former employee of such Person.


                                   ARTICLE II

                                TERMS OF MERGER

      Section 2.1   Statutory Merger.  Subject to the terms and conditions and
                    ----------------                                          
in reliance upon the representations, warranties, covenants and agreements
contained herein, Newco will merge with and into the Company at the Effective
Time.  The terms and conditions of the Merger and the mode of carrying the same
into effect will be as set forth in this Agreement.  As a result of the Merger,
the separate corporate existence of Newco will cease and the Company will
continue as the Surviving Corporation and shall succeed to and assume all of the
rights and obligations of Newco in accordance with the DGCL.

                                       12
<PAGE>
 
      Section 2.2   Effective Time.  As soon as practicable after the
                    --------------                                   
satisfaction or, if permissible, waiver of the conditions set forth in Article
                                                                       -------
VIII hereof, the parties hereto will cause the Merger to be consummated by
- ----                                                                      
filing a certificate of merger (the "Certificate of Merger") with the Secretary
of State of the State of Delaware, in such form as required by, and executed in
accordance with the relevant provisions of, the DGCL.

      Section 2.3   Effect of the Merger.  At the Effective Time, the effect of
                    --------------------                                       
the Merger will be as provided in the applicable provisions of the DGCL.

      Section 2.4    Certificate of Incorporation; Bylaws.  At the Effective
                    ------------------------------------                   
Time, the certificate of incorporation and the bylaws of Newco, as in effect
immediately prior to the Effective Time will be the certificate of incorporation
and the bylaws of the Surviving Corporation, except that from and after the
Effective Time Article I of the certificate of incorporation will be read in its
entirety as follows:

      The name of the corporation is "BENCHMARQ Microelectronics, Inc."

      Section 2.5   Directors and Officers.  The directors of Newco immediately
                    ----------------------                                     
prior to the Effective Time will be the directors of the Surviving Corporation,
each to hold office in accordance with the certificate of incorporation and
bylaws of the Surviving Corporation, and the officers of the Company immediately
prior to the Effective Time will be the officers of the Surviving Corporation,
in each case until their respective successors are duly elected or appointed and
qualified.

                                  ARTICLE III

              CONVERSION OF SECURITIES; EXCHANGE OF CERTIFICATES

      Section 3.1   Merger Consideration; Conversion and Cancellation of
                    ----------------------------------------------------
Securities.  At the Effective Time, by virtue of the Merger and without any
- ----------                                                                 
action on the part of the Acquiror Companies, the Company or the holders of any
of the securities of the Company:

          (a) Subject to the provisions of Section 3.2 hereof and the other
     provisions of this Article III, each share of Company Common Stock issued
                        -----------                                           
     and outstanding immediately prior to the Effective Time (excluding any
     Company Common Stock described in Subsection 3.1(c)) will be converted into
                                       -----------------                        
     the right to receive one (1) share of Acquiror Common Stock (and the
     associated Acquiror Right) (as such ratio is adjusted pursuant to Section
                                                                       -------
     3.2, the "Exchange Ratio"). Notwithstanding the foregoing, if between the
     ---                                                                      
     date of this Agreement and the Effective Time the outstanding shares of the
     Acquiror Common Stock or the Company Common Stock shall have been changed
     into a different number of shares or a different class, by reason of any
     stock dividend, subdivision, reclassification, recapitalization, split,
     conversion, consolidation, combination or exchange of shares, the Common
     Stock Exchange Ratio will be correspondingly adjusted to reflect such stock
     dividend, subdivision, reclassification, recapitalization, split,
     conversion, consolidation, combination or exchange of shares.

                                       13
<PAGE>
 
          (b) Subject to the other provisions of this Article III, all shares of
                                                      -----------               
     Company Common Stock will, upon conversion thereof into shares of Acquiror
     Common Stock (and the associated Acquiror Rights) at the Effective Time,
     cease to be outstanding and will automatically be cancelled and retired,
     and each certificate previously evidencing Company Common Stock outstanding
     immediately prior to the Effective Time (other than Company Common Stock
     described in Subsection 3.1(c)) will thereafter be deemed, for all purposes
                  -----------------                                             
     other than the payment of dividends or distributions, to represent that
     number of shares of Acquiror Common Stock (and the associated Acquiror
     Rights) determined pursuant to the Common Stock Exchange Ratio.  The
     holders of certificates previously evidencing Company Common Stock will
     cease to have any rights with respect to such Company Common Stock except
     as otherwise provided herein or by Law.

          (c) Notwithstanding any provision of this Agreement to the contrary,
     each share of Company Common Stock held in the treasury of the Company and
     each share of Company Common Stock, if any, owned by the Acquiror or any
     direct or indirect wholly-owned Subsidiary of the Acquiror or of the
     Company immediately prior to the Effective Time will be cancelled.

          (d) Each share of common stock, par value $.01 per share, of Newco
     issued and outstanding immediately prior to the Effective Time shall be
     converted into and become one fully paid and nonassessable share of common
     stock, par value $.01 per share, of the Surviving Corporation.

     Section 3.2    Adjustments to the Exchange Ratio.  The Exchange Ratio shall
                    ---------------------------------                           
be subject to adjustment as follows:

          (a)  if the average of the mean high and low per share trading prices
     on the NYSE of shares of Acquiror Common Stock (as reported for the NYSE
     Composite Transactions in the Wall Street Journal) during the 20
     consecutive trading days ending on the tenth day prior to the Company
     Stockholders' Meeting (the "Pre-Closing Average Price") is less than
     $16.00, then the Exchange Ratio shall be adjusted such that each share of
     Company Common Stock is converted into the right to receive a number of
     shares of Acquiror Common Stock (and the  associated Acquiror Rights)
     equal to the quotient obtained by dividing (i) $16.00 by (ii) the Pre-
     Closing Average Price, provided, however, that, the Exchange Ratio shall in
     no event be higher than 1.33; and

          (b)   if the Pre-Closing Average Price is greater than $24.00, then
     the Exchange Ratio shall be adjusted such that each share of Company Common
     Stock is converted into the right to receive a number of shares of Acquiror
     Common Stock (and the associated Acquiror Rights) equal to the quotient
     obtained by dividing (i) $24.00 by (ii) the Pre-Closing Average Price.

                                       14
<PAGE>
 
      Section 3.3   Exchange of Certificates.
                    ------------------------ 

          (a) Exchange Fund.  On the Closing Date, the Acquiror will deposit, or
              -------------                                                     
     cause to be deposited, with the Exchange Agent, for the benefit of the
     former holders of Company Common Stock, for exchange in accordance with
     this Article III, through the Exchange Agent, (i) certificates evidencing a
          -----------                                                           
     number of shares of Acquiror Common Stock (and the associated Acquiror
     Rights) equal to the product of the Exchange Ratio multiplied by the number
     of shares of Company Common Stock issued and outstanding immediately prior
     to the Effective Time  (exclusive of any such shares to be cancelled
     pursuant to Subsection 3.1(c)) and (ii) cash in an amount equal to any
                 -----------------                                         
     dividends or other distributions declared in respect of such shares of
     Acquiror Common Stock and having a record date after the Effective Time.
     Thereafter, the Acquiror will deposit, or cause to be deposited, with the
     Exchange Agent, for the benefit of any former holders of Company Common
     Stock who have not yet surrendered their shares of Company Common Stock for
     exchange, at the appropriate payment date, the amount of dividends or other
     distributions, with a record date after the Effective Time but prior to
     surrender, payable with respect to any shares of Acquiror Common Stock
     remaining in the Exchange Fund on such record date.  The Exchange Agent
     will, pursuant to irrevocable instructions from the Acquiror, deliver
     Acquiror Common Stock (and associated Acquiror Rights) and any dividends or
     distributions related thereto, in exchange for certificates theretofore
     evidencing Company Common Stock surrendered to the Exchange Agent pursuant
     to Subsection 3.3(c).
        ----------------- 

          (b) Letter of Transmittal.  Promptly after the Effective Time, the
              ---------------------                                         
     Acquiror will cause the Exchange Agent to mail to each record holder of a
     certificate or certificates representing Company Common Stock immediately
     prior to the Effective Time (i) a letter of transmittal which shall specify
     that delivery shall be effected, and risk of loss and title to the
     certificates for Company Common Stock shall pass, only upon delivery of the
     certificates for Company Common Stock to the Exchange Agent and shall be in
     such form and have such other provisions, including appropriate provisions
     with respect to back-up withholding, as the Acquiror may reasonably
     specify, and (ii) instructions for use in effecting the surrender of the
     certificates for Company Common Stock.  Upon surrender of a certificate for
     Company Common Stock for cancellation to the Exchange Agent, together with
     such letter of transmittal, duly executed and completed in accordance with
     the instructions thereto, the holder thereof shall be entitled to receive
     in exchange therefor that portion of the Exchange Fund which such holder
     has the right to receive pursuant to the provisions of this Article III,
                                                                 ----------- 
     after giving effect to any required withholding tax, and the certificate
     for Company Common Stock so surrendered shall forthwith be cancelled.  No
     interest will be paid or accrued on the cash, if any, to be paid which is
     in the Exchange Fund as part of the Exchange Ratio.

          (c) Exchange Procedures.  Promptly after the Effective Time, the
              -------------------                                         
     Exchange Agent will distribute to each former holder of Company Common
     Stock, upon surrender to the Exchange Agent for cancellation of one or more
     certificates, accompanied by a duly executed letter of transmittal that
     theretofore evidenced shares of Company Common Stock, certificates
     evidencing the appropriate number of shares of Acquiror Common Stock (and

                                       15
<PAGE>
 
     the associated Acquiror Rights) into which such shares of Company Common
     Stock were converted pursuant to the Merger and any dividends or
     distributions related thereto. If shares of Acquiror Common Stock (and the
     associated Acquiror Rights) are to be issued to a Person other than the
     Person in whose name the surrendered certificate or certificates are
     registered, it will be a condition of issuance of the Acquiror Common Stock
     (and the associated Acquiror Rights) that the surrendered certificate or
     certificates shall be properly endorsed, with signatures guaranteed by a
     member firm of the NYSE or a bank chartered under the Laws of the United
     States of America, or otherwise in proper form for transfer and that the
     Person requesting such payment shall pay any transfer or other taxes
     required by reason of the issuance of Acquiror Common Stock (and the
     associated Acquiror Rights) to a Person other than the registered holder of
     the surrendered certificate or certificates or such Person shall establish
     to the satisfaction of the Acquiror that any such tax has been paid or is
     not applicable.  Notwithstanding the foregoing, neither the Exchange Agent
     nor any party hereto will be liable to any former holder of Company Common
     Stock for any Acquiror Common Stock (and the associated Acquiror Rights) or
     dividends or distributions thereon delivered to a public official pursuant
     to any applicable escheat Law.

          (d) Distributions with Respect to Unexchanged Shares of Company Common
              ------------------------------------------------------------------
     Stock.  No dividends or other distributions declared or made with respect
     -----                                                                    
     to Acquiror Common Stock with a record date on or after the Effective Time
     will be paid to the holder of any certificate that theretofore evidenced
     shares of Company Common Stock until the holder of such certificate shall
     surrender such certificate.  Subject to the effect of any applicable
     escheat Law, following surrender of any such certificate, there will be
     paid from the Exchange Fund to the holder of the certificates evidencing
     whole shares of Acquiror Common Stock (and the associated Acquiror Rights)
     issued in exchange therefor, without interest, (i) promptly, the amount of
     dividends or other distributions with a record date after the Effective
     Time theretofore paid with respect to such whole shares of Acquiror Common
     Stock, and (ii) at the appropriate payment date, the amount of dividends or
     other distributions, with a record date after the Effective Time but prior
     to surrender and a payment date occurring after surrender, payable with
     respect to such whole shares of Acquiror Common Stock.

          (e) Termination of Exchange Fund.  Any portion of the Exchange Fund
              ----------------------------                                   
     which remains unclaimed by the former holders of Company Common Stock for
     twelve months after the Effective Time will be delivered to the Acquiror,
     upon demand, and any former holders of Company Common Stock who have not
     theretofore complied with this Article III will, subject to applicable
                                    -----------                            
     abandoned property, escheat and other similar Laws, thereafter look only to
     the Acquiror for the Acquiror Common Stock (and associated Acquiror Rights)
     and any cash to which they are entitled.

          (f) Withholding of Tax.  The Acquiror or the Exchange Agent will be
              ------------------                                             
     entitled to deduct and withhold from the consideration otherwise payable
     pursuant to this Agreement to any former holder of Company Common Stock
     such amounts as the Acquiror (or any affiliate thereof) or the Exchange
     Agent are required to deduct and withhold with respect to

                                       16
<PAGE>
 
     the making of such payment under the Code, or any provision of state, local
     or foreign tax Law. To the extent that amounts are so withheld by the
     Acquiror or the Exchange Agent, such withheld amounts will be treated for
     all purposes of this Agreement as having been paid to the former holder of
     Company Common Stock in respect of which such deduction and withholding
     were made by the Acquiror.

          (g) Lost Certificates.  If any certificate evidencing Company Common
              -----------------                                               
     Stock shall have been lost, stolen or destroyed, upon the making of an
     affidavit of that fact by the Person claiming such certificate to be lost,
     stolen or destroyed and, if required by the Acquiror, the posting by such
     Person of a bond, in such reasonable amount as the Acquiror may direct, as
     indemnity against claims that may be made against it with respect to such
     certificate, the Exchange Agent will issue in exchange for such lost,
     stolen or destroyed certificate the Acquiror Common Stock (and associated
     Acquiror Rights) to which the holder may be entitled pursuant to this
                                                                          
     Article III and any dividends or other distributions to which the holder
     -----------                                                             
     thereof may be entitled pursuant to Subsection 3.3(d).
                                         ----------------- 

      Section 3.4   Closing.  The Closing will take place at the offices of
                    -------                                                
Skadden, Arps, Slate, Meagher & Flom LLP, One Beacon Street, Boston,
Massachusetts 02108, at 10:00 a.m. local time on the second Business Day
following the date on which the conditions to the Closing have been satisfied or
waived or at such other place, time and date as the parties hereto may agree.
At the conclusion of the Closing on the Closing Date, the parties hereto will
cause the Certificate of Merger to be filed with the Secretary of State of the
State of Delaware.

      Section 3.5   Stock Transfer Books.  At the Effective Time, the stock
                    --------------------                                   
transfer books of the Company will be closed and there will be no further
registration of transfers of shares of Company Common Stock thereafter on the
records of the Company.  If, after the Effective Time, certificates representing
Company Common Stock are presented to the Surviving Corporation, they shall be
cancelled and upon delivery of a duly executed letter of transmittal exchanged
for certificates representing Acquiror Common Stock (and associated Acquiror
Rights).

      Section 3.6   No Fractional Shares.  In the event the Exchange Ratio is
                    --------------------                                     
modified or changed in a manner that would result in the issuance of fractional
shares of Acquiror Common Stock, the parties nevertheless agree that no
fractional shares of Acquiror Common Stock shall be issued to the holders of
Company Common Stock.  In lieu of any such fractional shares, each holder of
record of Company Common Stock at the Effective Time who but for the provisions
of this Section 3.6 would be entitled to receive a fractional share of Acquiror
Common Stock pursuant to the Merger shall be paid cash, without any interest
thereon, in an amount equal to the product of such fraction multiplied by the
closing sale price of one share of Acquiror Common Stock on the NYSE on the day
of the Effective Time, or, if shares of Acquiror Common Stock are not so traded
on such day, the closing sale price of one such share on the next preceding day
on which such share was traded on the NYSE. For this purpose, shares of Company
Common Stock of any holder represented by two or more certificates may be
aggregated, and in no event shall any holder be paid an amount in respect of
more than one share of Acquiror Common Stock.

                                       17
<PAGE>
 
                                  ARTICLE IV

                 REPRESENTATIONS AND WARRANTIES OF THE COMPANY

      The Company hereby represents and warrants to the Acquiror Companies that:

      Section 4.1   Organization and Qualification; Subsidiaries.  The Company
                    --------------------------------------------              
and each Subsidiary of the Company are legal entities duly organized, validly
existing and in good standing under the Laws of their respective jurisdictions
of incorporation or organization, have all requisite power and authority to own,
lease and operate their respective properties and to carry on their business as
it is now being conducted and are duly qualified and in good standing to do
business in each jurisdiction in which the nature of the business conducted by
them or the ownership or leasing of their respective properties makes such
qualification necessary, other than any matters, including the failure to be so
duly qualified and in good standing, that would not individually or in the
aggregate have a Material Adverse Effect on the Company.  Section 4.1 of the
                                                          -----------       
Company's Disclosure Letter sets forth, as of the date of this Agreement, a true
and complete list of all the Company's directly or indirectly owned
Subsidiaries, together with (A) the jurisdiction of incorporation of each
Subsidiary and the percentage of each Subsidiary's outstanding capital stock or
other equity interests owned by the Company or another Subsidiary of the
Company, and (B) an indication of whether each such Subsidiary is a Significant
Subsidiary.  Neither the Company nor any of its Subsidiaries owns an equity
interest in any partnership or joint venture arrangement or other business
entity that is Material to the Company.

      Section 4.2   Certificate of Incorporation; Bylaws.  The Company has
                    ------------------------------------                  
heretofore marked for identification and furnished to the Acquiror complete and
correct copies of the certificate of incorporation and the bylaws or the
equivalent organizational documents, in each case as amended or restated to the
date hereof, of the Company and each of its Subsidiaries. Neither the Company
nor any of its Subsidiaries is in violation of any of the provisions of its
certificate of incorporation or bylaws (or equivalent organizational documents).

      Section 4.3   Capitalization.
                    -------------- 

          (a) The authorized capital stock of the Company consists of (i)
     50,000,000 shares of Company Common Stock of which, as of February 27,
     1998,  7,114,939 shares were issued and outstanding, all of which are duly
     authorized, validly issued, fully paid and nonassessable and were not
     issued in violation of the preemptive or similar rights of any Person and
     (ii) 22,000,000 shares of Preferred Stock,  par value $.01 per share, of
     which none is issued.  Since February 27, 1998, the Company has not issued
     any shares of the Company Common Stock except pursuant to the exercise of
     outstanding Company Stock Options  and otherwise to the extent set forth in
                                                                                
     Subsection 4.3(a) of the Company's Disclosure Letter.  Except as set forth
     -----------------                                                         
     in Subsection 4.3(a) of the Company's Disclosure Letter, since February 2,
        -----------------                                                      
     1998, the Company has not granted any options for, or other rights to
     purchase, shares of the capital stock of the Company.

                                       18
<PAGE>
 
          (b) Except as set forth in Subsection 4.3(b) of the Company's
                                    ------------------                 
     Disclosure Letter or in the Company's Consolidated Financial Statements, no
     shares of capital stock of the Company are reserved for issuance, and there
     are no contracts, agreements, commitments or arrangements obligating the
     Company (i) to offer, sell, issue, grant, pledge, dispose of or encumber
     any shares of, or any options, warrants or rights of any kind to acquire
     any shares of, or any securities that are convertible into or exchangeable
     for any shares of, capital stock of the Company, (ii to redeem, purchase or
     acquire, or offer to purchase or acquire, any outstanding shares of, or any
     outstanding options, warrants or rights of any kind to acquire any shares
     of, or any outstanding securities that are convertible into or exchangeable
     for any shares of, capital stock of the Company or (ii to grant any Lien on
     any shares of capital stock of the Company.

          (c) The authorized, issued and outstanding capital stock of, or other
     equity interests in, each of the Company's Subsidiaries and the names and
     addresses of the holders of record of the capital stock or other equity
     interests of each such Subsidiary are set forth in Subsection 4.3(c) of the
                                                        -----------------       
     Company's Disclosure Letter.  Except as set forth in Subsection 4.3(c) of
                                                          -----------------   
     the Company's Disclosure Letter, (i) the issued and outstanding shares of
     capital stock of, or other equity interests in, each of the Subsidiaries of
     the Company that are owned by the Company or any of its Subsidiaries have
     been duly authorized and are validly issued, and, with respect to capital
     stock, are fully paid and nonassessable, and were not issued in violation
     of any preemptive or similar rights of any Person; (ii) all such issued and
     outstanding shares, or other equity interests, that are indicated as owned
     by the Company or one of its Subsidiaries in Subsection 4.3(c) of the
                                                  -----------------       
     Company's Disclosure Letter are owned (A) beneficially as set forth therein
     and (B) free and clear of all Liens;  (iii) no shares of capital stock of,
     or other equity interests in, any Subsidiary of the Company are reserved
     for issuance, and there are no contracts, agreements, commitments or
     arrangements obligating the Company or any of its Subsidiaries (A) to
     offer, sell, issue, grant, pledge, dispose of or encumber any shares of
     capital stock of, or other equity interests in, or any options, warrants or
     rights of any kind to acquire any shares of capital stock of, or other
     equity interests in, or any securities that are convertible into or
     exchangeable for any shares of capital stock of, or other equity interests
     in, any of the Subsidiaries of the Company or (B) to redeem, purchase or
     acquire, or offer to purchase or acquire, any outstanding shares of capital
     stock of, or other equity interests in, or any outstanding options,
     warrants or rights of any kind to acquire any shares of capital stock of or
     other equity interest in, or any outstanding securities that are
     convertible into or exchangeable for, any shares of capital stock of, or
     other equity interests in, any of the Subsidiaries of the Company or (C) to
     grant any Lien on any outstanding shares of capital stock of, or other
     equity interest in, any of the Subsidiaries of the Company; except with
     respect to clause (i), (ii) or (iii) of this Subsection 4.3(c) for such
                                                  -----------------         
     matters that would not, in the aggregate, have a Material Adverse Effect on
     the Company.

          (d) Except as set forth in Subsection 4.3(d) of the Company's
                                     -----------------                 
     Disclosure Letter, there are no voting trusts, proxies or other agreements,
     commitments or understandings of any character to which the Company or any
     of its Subsidiaries or, to the Knowledge of the Company, any third Person,
     is a party or by which the Company or any of its Subsidiaries

                                       19
<PAGE>
 
     is bound with respect to the voting of any shares of capital stock of the
     Company or any of its Subsidiaries or with respect to the registration of
     the offering, sale or delivery of any shares of capital stock of the
     Company or any of its Subsidiaries under the Securities Act.

      Section 4.4   Authorization of Agreement.  The Company has all requisite
                    --------------------------                                
corporate power and authority to execute and deliver this Agreement, the Option
Agreement and each instrument required hereby to be executed and delivered by it
at the Closing, to perform its obligations hereunder and thereunder and to
consummate the transactions contemplated hereby and thereby.  The execution and
delivery by the Company of this Agreement, the Option Agreement and each
instrument required hereby to be executed and delivered by it at the Closing and
the performance of its obligations hereunder and thereunder have been duly and
validly authorized by all requisite corporate action on the part of the Company
(other than, with respect to the Merger, the approval and adoption of this
Agreement by the stockholders of the Company, which approval and adoption in
accordance with the DGCL and the Company's certificate of incorporation shall
require the affirmative vote of the holders of at least a majority of the
outstanding shares of Company Common Stock).  This Agreement and the Option
Agreement have been duly executed and delivered by the Company and (assuming due
authorization, execution and delivery hereof by the Acquiror Companies)
constitute  legal, valid and binding obligations of the Company, enforceable
against the Company in accordance with their  terms, subject to bankruptcy,
insolvency, reorganization, moratorium or similar laws now or hereafter in
effect relating to creditors' rights generally or to general principles of
equity.

      Section 4.5   Approvals.  Except for the applicable requirements, if any,
                    ---------                                                  
of (a) the Securities Act, (b) the Exchange Act, (c) state securities or blue
sky Laws, (d) the HSR Act, (e) the filing and recordation of appropriate merger
documents as required by the DGCL and (f) those Laws, Regulations and Orders
noncompliance with which would not have in the aggregate a material adverse
effect on the ability of the Company to perform its obligations under this
Agreement or the Option Agreement or a Material Adverse Effect on the Company,
no filing or registration with, no waiting period imposed by and no Permit,
Order, or consent of, any Court or Governmental Authority is required under any
Law, Regulation or Order applicable to the Company or any of its Subsidiaries to
permit the Company to execute, deliver or perform this Agreement or the Option
Agreement or any instrument required hereby to be executed and delivered by it
at the Closing.

      Section 4.6   No Violation.  Assuming effectuation of all filings and
                    ------------                                           
registrations with, termination or expiration of any applicable waiting periods
imposed by and receipt of all Permits, Orders and consents of, Courts or
Governmental Authorities indicated as required in Section 4.5 hereof and receipt
                                                  -----------                   
of the approval of the Merger by the stockholders of the Company as required by
the DGCL and except as set forth in Section 4.6 of the Company's Disclosure
                                    -----------                            
Letter, neither the execution and delivery by the Company of this Agreement,
the Option Agreement or any instrument required hereby to be executed and
delivered by it at the Closing nor the performance by the Company of its
obligations hereunder or thereunder will (a) violate or breach the terms of or
cause a default under (i) any Law, Regulation or Order applicable to the
Company, (ii the certificate of incorporation or bylaws of the Company or (ii
any contract, note, bond, mortgage, indenture, license, agreement or other
instrument to which the Company or any of its Subsidiaries is a party

                                       20
<PAGE>
 
or by which it or any of its properties or assets is bound, or (b) with the
passage of time, the giving of notice or the taking of any action by a third
Person, have any of the effects set forth in clause (a) of this Section 4.6,
                                                                -----------
except in any such case for any matters described in this Section 4.6 that would
                                                          -----------
not in the aggregate have a Material Adverse Effect upon the ability of the
Company to perform its obligations under this Agreement or the Option Agreement
or a Material Adverse Effect on the Company. Prior to the execution of this
Agreement, the Board of Directors of the Company has taken all requisite action
to cause this Agreement and the transactions contemplated hereby to be exempt
from the provisions of Section 203 of the DGCL.

      Section 4.7   Reports.
                    ------- 

          (a) Since December 31, 1994, the Company and its Subsidiaries have
     timely filed (i) all SEC Reports required to be filed with the Commission
     and (ii) all other Reports required to be filed with any other Governmental
     Authorities, including state securities administrators, except where the
     failure to file any such Reports would not in the aggregate have a Material
     Adverse Effect on the Company.  Such Reports, including all those filed
     after the date of this Agreement and prior to the Effective Time, (i) were
     prepared in all Material respects in accordance with the requirements of
     applicable Law (including, with respect to the SEC Reports of the Company,
     the Securities Act and the Exchange Act, as the case may be) and (ii), in
     the case of SEC Reports, did not at the time they were filed contain any
     untrue statement of a Material fact or omit to state a Material fact
     required to be stated therein or necessary to make the statements therein,
     in the light of the circumstances under which they were made, not
     misleading.

          (b) The Company's Consolidated Financial Statements and any
     consolidated financial statements of the Company (including any related
     notes thereto) contained in any SEC Reports of the Company filed with the
     Commission since December 31, 1994 (i) have been or will have been prepared
     in accordance with the published Regulations of the Commission and in
     accordance with GAAP consistently applied during the periods involved,
     (except (A) to the extent required by changes in GAAP and (B), with respect
     to SEC Reports of the Company filed prior to the date of this Agreement, as
     may be indicated in the notes thereto) and (ii) fairly present the
     consolidated financial position of the Company and its Subsidiaries as of
     the respective dates thereof and the consolidated results of their
     operations and cash flows for the periods indicated (including, in the case
     of any unaudited interim financial statements, reasonable estimates of
     normal and recurring year-end adjustments).

          (c) Except as set forth in Subsection 4.7(c) of the Company's
                                     -----------------                 
     Disclosure Letter, there exist no liabilities or obligations of the Company
     and its Subsidiaries that are Material to the Company, whether accrued,
     absolute, contingent or threatened, which would be required to be
     reflected, reserved for or disclosed under GAAP in consolidated financial
     statements of the Company (including the notes thereto) as of and for the
     period ended on the date of this representation and warranty, other than
     (i) liabilities or obligations that are adequately reflected, reserved for
     or disclosed in the Company's Consolidated Financial Statements, (ii
     liabilities or obligations incurred in the ordinary course of business of
     the

                                       21
<PAGE>
 
      Company and its Subsidiaries since September 30, 1997, and (iii)
     liabilities or obligations the incurrence of which is not prohibited by
     Subsection 6.2(a).
     ----------------- 

      Section 4.8   No Material Adverse Effect; Conduct.
                    ----------------------------------- 

          (a) Since December 31, 1996, (i) no event or events (other than any
     event that is directly attributable to the prospect of consummation of the
     Merger or is of general application to all or a substantial portion of the
     Company's industry and other than any event that is expressly subject to
     any other representation or warranty contained in this Article IV) have, to
                                                            ----------          
     the Knowledge of the Company, occurred that,  individually or in the
     aggregate, would constitute or cause a Material Adverse Effect on the
     Company and (ii) there have not been any change or changes in the business,
     condition (financial or other), results of operations, properties, assets
     or liabilities of the Company or its Subsidiaries which would have, in the
     aggregate, a Material Adverse Effect on the Company.

          (b) Except as disclosed in Subsection 4.8(b) of the Company's
                                     -----------------                 
     Disclosure Letter, during the period from December 31, 1996 to the date of
     this Agreement, neither the Company nor any of its Subsidiaries has engaged
     in any conduct that is proscribed during the period from the date of this
     Agreement to the Effective Time by subsections (i) through (xiii) of
                                                                         
     Subsection 6.2(a) or agreed in writing or otherwise during such period
     -----------------                                                     
     prior to the date of this Agreement to engage in any such conduct.

      Section 4.9   Title  to Properties.  The Company or its Subsidiaries,
                    --------------------                                   
individually or together, have good, valid and marketable title to or a valid
leasehold in, all of the properties and assets (real, personal and mixed,
tangible and intangible) that are necessary to the conduct of the business of
the Company as it is currently being conducted including, without limitation,
all of the properties and assets reflected in the Company's Consolidated Balance
Sheet, other than any properties or assets that (i) have been sold or otherwise
disposed of in the ordinary course of business consistent with past practice or
(ii are not, individually or in the aggregate, Material to the Company, free and
clear of Liens, other than (x) Liens the existence of which is reflected in the
Company's Consolidated Financial Statements and (y) Liens that, individually or
in the aggregate, are not Material to the Company.  None of such properties are
securities pledged for interest rate swap, cap or floor contracts. The Company
or its Subsidiaries, individually or together, hold under valid lease agreements
all real and personal properties being held under capitalized leases, and all
real and personal property that is subject to operating leases, and enjoy
peaceful and undisturbed possession of such properties under such leases, other
than (i) any properties as to which such leases have expired in accordance with
their terms without any liability of any party thereto and (ii) any properties
that, individually or in the aggregate, are not Material to the Company.
Neither the Company nor any of its Subsidiaries has received any written notice
of any adverse claim to the title to any properties owned by them or with
respect to any lease under which any properties are held by them, other than any
claims that, individually or in the aggregate, would not have a Material Adverse
Effect on the Company.

                                       22
<PAGE>
 
      Section 4.10   Certain Obligations.  Section 4.10 of the Company's
                     -------------------   ------------                 
Disclosure Letter contains a true and complete list of the Material Contracts of
the Company and its Subsidiaries. Except as set forth in Section 4.10 of the
                                                         ------------       
Company's Disclosure Letter, all Material Contracts to which the Company or any
of its Subsidiaries is a party are in full force and effect, the Company or the
Subsidiary of the Company that is a party to or bound by such Material Contract
has performed its obligations thereunder to date and, to the Knowledge of the
Company, each other party thereto has performed its obligations thereunder to
date, other than any failure of any such Material Contract to be in full force
and effect or any nonperformance thereof that would not have a Material Adverse
Effect on the Company.

      Section 4.11   Permits; Compliance. The Company and its Subsidiaries have
                     -------------------                                       
obtained all Permits that are necessary to carry on their businesses as
currently conducted, except for any such Permits which the failure to possess,
individually or in the aggregate, would not have a Material Adverse Effect on
the Company.  Such Permits are in full force and effect, have not been violated
in any respect that would have a Material Adverse Effect on the Company and, to
the Knowledge of the Company, no suspension, revocation or cancellation thereof
has been threatened and there is no action, proceeding or investigation pending
or threatened regarding suspension, revocation or cancellation of any of such
Permits, except where the suspension, revocation or cancellation of such Permits
would not have a Material Adverse Effect on the Company.

      Section 4.12   Litigation; Compliance with Laws.  There are no actions,
                     --------------------------------                        
suits, investigations or proceedings (including any proceedings in arbitration)
pending or, to the Knowledge of the Company, threatened against the Company or
any of its Subsidiaries, at law or in equity, in any Court or before or by any
Governmental Authority, except actions, suits or proceedings that (a) are set
forth in Section 4.12 or any other Section of the Company's Disclosure Letter or
         ------------                                                           
(b) in the aggregate, would not have a Material Adverse Effect on the Company.
There are no claims pending or, to the Knowledge of the Company, threatened by
any Persons against the Company or any of its Subsidiaries for indemnification
pursuant to any Law, organizational document, contract or otherwise with respect
to any action, suit, investigation or proceeding pending in any Court or before
or by any Governmental Authority.  Except as set forth in Section 4.12 of the
                                                          ------------       
Company's Disclosure Letter, neither the Company nor any of its Subsidiaries is
subject to any written agreement, directive, memorandum of understanding or
Order with or by any Court or Governmental Authority restricting its operation
or requiring any Material actions.  Except as set forth in Section 4.12 of the
                                                           ------------       
Company's Disclosure Letter, the Company and its Subsidiaries are in compliance
with all applicable Laws and Regulations and are not in default with respect to
any Order applicable to the Company or any of its Subsidiaries, except such
events of noncompliance or defaults that, individually or in the aggregate,
would not have a Material Adverse Effect on the Company.

      Section 4.13   Information in Disclosure Documents and Registration
                     ----------------------------------------------------
Statement.  None of the information to be supplied by Company for inclusion or
- ---------                                                                     
incorporation by reference in the joint proxy statement to be distributed in
connection with the Acquiror and Company's respective meetings of stockholders
to vote upon this Agreement, (the "Proxy Statement") or the registration
statement on Form S-4 (such registration statement, together with any amendments
thereof or supplements thereto being the "Registration Statement") to be filed
by Acquiror with the SEC will,

                                       23
<PAGE>
 
in the case of the Registration Statement, at the time it becomes effective and
at the Effective Time, or, in the case of the Proxy Statement or any amendments
thereof or supplements thereto, at the time of the mailing of the Proxy
Statement and any amendments or supplements thereto and at the time of the
meetings of stockholders to be held in connection with the Merger, contain any
untrue state ment of a material fact or omit to state any material fact required
to be stated therein or necessary in order to make the statements therein, in
light of the circumstances under which they are made, not misleading. The Proxy
Statement will comply as to form in all material respects with the provisions of
the Exchange Act, and the Regulations promulgated thereunder.

        Section 4.14  Employee Plans; Collective Bargaining Agreements.  Except
                      ------------------------------------------------         
as set forth in Section 4.14 of the Company's Disclosure Letter, the Company
                ------------                                                
represents and warrants as follows:

          (a)  Pension Plans.
               ------------- 

               (i)   No "accumulated funding deficiency" (for which an excise
          tax is due or would be due in the absence of a waiver) as defined in
          section 412 of the Code or as defined in Section 302(a)(2) of ERISA,
          whichever may apply, has been incurred with respect to any Pension
          Plan of the Company or any ERISA Affiliate thereof with respect to any
          plan year, whether or not waived. Neither the Company nor any ERISA
          Affiliate thereof has failed to pay when due any "required
          installment," within the meaning of section 412(m) of the Code and
          Section 302(e) of ERISA, whichever may apply, with respect to any such
          Pension Plan. Neither the Company nor any ERISA Affiliate thereof is
          subject to any Lien imposed under section 412(n) of the Code or
          Section 302(f) or 4068 of ERISA, whichever may apply, with respect to
          any such Pension Plan. All "benefit liabilities" within the meaning of
          Section 4001(a)(16) of ERISA, are fully funded as of the Closing Date
          with respect to each such Pension Plan as determined on a termination
          basis using the assumed interest rate set forth in each Pension Plan.

               (ii)  Neither the Company nor any ERISA Affiliate thereof is
     required to provide security to a Pension Plan under section 401(a)(29) of
     the Code.

               (iii) Except as otherwise disclosed in Subsection 4.14(a) of the
                                                      ------------------       
     Company's Disclosure Letter, each Pension Plan of the Company or any ERISA
     Affiliate thereof and each related trust agreement, annuity contract or
     other funding instrument is qualified and tax exempt under the provisions
     of Code sections 401(a) and 501(a), and each has been so determined by the
     IRS, or application for such determination has been made and is currently
     pending.  Any such Pension Plan that has been terminated has received a
     favorable determination letter from the IRS with respect to its
     termination, or application for such determination has been made and is
     currently pending.

               (iv)  Each Pension Plan of the Company or any ERISA Affiliate
     thereof, related trust agreement, annuity contract or other funding
     instrument is in Material

                                       24
<PAGE>
 
     compliance with its terms and, both as to form and in operation, with the
     requirements prescribed by any and all Laws which are applicable to such
     Pension Plan, related trust agreement, annuity contract or other funding
     instrument, including without limitation ERISA and the Code.

               (v) The Company or an ERISA Affiliate thereof has paid all
     premiums (and interest charges and penalties for late payment, if
     applicable) due to the PBGC with respect to each Pension Plan of the
     Company or any ERISA Affiliate thereof which is covered by Title IV of
     ERISA for each plan year thereof for which such premiums are required.
     Neither the Company nor any ERISA Affiliate thereof has engaged in, or is a
     successor or parent corporation to an entity that has engaged in, a
     transaction which is described in Section 4069 of ERISA.  There has been no
     unreported "reportable event" (as defined in Section 4043(b) of ERISA and
     the PBGC regulations under such Section) requiring notice to the PBGC with
     respect to any Pension Plan of the Company or any ERISA Affiliate thereof.
     No filing has been made by the Company or any ERISA Affiliate thereof with
     the PBGC, and no proceeding has been commenced by the PBGC, to terminate
     any Pension Plan of the Company or any ERISA Affiliate thereof.  No
     condition exists and no event has occurred that could constitute grounds
     for the termination of any Pension Plan of the Company or any ERISA
     Affiliate thereof by the PBGC, or which could reasonably be expected to
     result in liability of the Company or any ERISA Affiliate thereof to the
     PBGC with respect to any such Pension Plan, other than liabilities for
     premium payments.  Neither the Company nor any ERISA Affiliate thereof has,
     at any time, (1) ceased operations at a facility so as to become subject to
     the provisions of Section 4062(e) of ERISA, (2) withdrawn as a substantial
     employer so as to become subject to the provisions of Section 4063 of
     ERISA, or (3) ceased making contributions to any Pension Plan of the
     Company or any ERISA Affiliate thereof subject to Section 4064(a) of ERISA
     to which the Company or any ERISA Affiliate thereof made contributions
     during the six (6) years prior to the date hereof.

          (b) Multiemployer Plans.  There are no Multiemployer Plans of the
              -------------------                                          
     Company or any ERISA Affiliate thereof, and neither the Company nor any
     ERISA Affiliate thereof has ever maintained, contributed to, or
     participated or agreed to participate in any Multiemployer Plan.

          (c) Welfare Plans.
              ------------- 

               (i)  Each Welfare Plan of the Company or any ERISA Affiliate
     thereof is in Material compliance with its terms and, both as to form and
     operation, with the requirements prescribed by any and all Laws which are
     applicable to such Welfare Plan, including without limitation ERISA and the
     Code.

               (ii) An estimate of the liabilities of the Company and any of its
     ERISA Affiliates for providing retiree life and medical benefits coverage
     to active and retired

                                       25
<PAGE>
 
     employees of the Company and any of its ERISA Affiliates has been made and
     is reflected on the appropriate balance sheet and books and records
     according to Statement of Financial Accounting Standards No. 106. The
     Company or any ERISA Affiliate thereof has the right to modify or terminate
     any Welfare Plans of the Company or any ERISA Affiliate thereof that
     provide coverage or benefits for either or both retired and active
     employees and/or their dependents and beneficiaries.

               (iii)  Each Welfare Plan of the Company or any ERISA Affiliate
          thereof which is a "group health plan," as defined in Section 607(1)
          of ERISA, has been operated in material compliance at all times with
          the provisions of Parts 6 and 7 of Title I, Subtitle B of ERISA and
          sections 4980B and 9801 through 9806 of the Code.

               (iv)   There are no Welfare Plans of the Company or any ERISA
          Affiliate thereof which are self-insured "multiple employer welfare
          arrangements" as such term is defined in Section 3(40) of ERISA.

          (d)  Benefit Arrangements.
               -------------------- 

               (i)    Each Benefit Arrangement of the Company or any ERISA
          Affiliate thereof is in Material compliance with its terms and with
          the requirements prescribed by any and all Laws which are applicable
          to such Benefit Arrangement, including without limitation the Code.

               (ii)   Except as set forth in Subsection 4.14(d) of the Company's
                                           ------------------                 
          Disclosure Letter, neither the Company nor any ERISA Affiliate thereof
          is a party to or is bound by any severance agreement, plan, or program
          (other than such an agreement, plan, or program providing for payments
          of less than $50,000 in the aggregate to all participants).

               (iii)  Each outstanding Company Stock Options not vested or
          exercisable at the Effective Time shall, as a result of the
          transactions contemplated hereby, automatically and without any action
          by the Company or the Board of Directors of the Company, become vested
          and exercisable at the Effective Time.

          (e)  Fiduciary Duties and Prohibited Transactions.  Neither the
               --------------------------------------------
     Company nor any ERISA Affiliate thereof has any liability with respect to
     any transaction in violation of Sections 404 or 406 of ERISA or any
     "prohibited transaction," as defined in section 4975(c)(1) of the Code, for
     which no exemption exists under Section 408 of ERISA or section 4975(c)(2)
     or (d) of the Code to which any Welfare Plan or Pension Plan of the Company
     or any ERISA Affiliate thereof is subject. To the Knowledge of the Company,
     neither the Company nor any ERISA Affiliate thereof has participated in a
     violation of Part 4 of Title I, Subtitle B of ERISA by any plan fiduciary
     of any Welfare Plan or Pension Plan of the Company or any ERISA Affiliate
     thereof or has any unpaid civil penalty under Section 502(1) of ERISA.

                                       26
<PAGE>
 
          (f) Litigation.  There is no Material action, Order or claim, suit,
              ----------                                                     
     litigation, proceeding, arbitral action, governmental audit or
     investigation relating to or seeking benefits under any Employee Plan of
     the Company or any ERISA Affiliate thereof that is pending or, to the
     Knowledge of the Company, threatened or anticipated against the Company or
     any ERISA Affiliate thereof other than routine claims for benefits.

          (g) Unpaid Contributions.  Neither the Company nor any ERISA Affiliate
              --------------------                                              
     thereof has any liability for unpaid contributions with respect to any
     Employee Plan of the Company or any ERISA Affiliate thereof.  The Company
     and all its ERISA Affiliates have made all required contributions under
     each such Employee Plan or proper accruals have been made and are reflected
     on the appropriate balance sheet and books and records, including without
     limitation, any accruals for vacation or sick leave which may be carried
     over from one year to the next.

          (h) Change of Control Payments.  Except as otherwise disclosed in
              --------------------------                                   
     Subsection 4.14(h) of the Company's Disclosure Letter, the execution of
     ------------------                                                     
     this Agreement and the consummation of the transactions contemplated hereby
     will not, either alone or in connection with another event, result in any
     payment (whether of separation pay or otherwise) becoming due from the
     Company or any ERISA Affiliate thereof (under an Employee Plan of the
     Company or any ERISA Affiliate thereof or otherwise) to any current or
     former employee or consultant of the Company or any ERISA Affiliate
     thereof, or result in the vesting, acceleration of payment or increase in
     the amount of any benefit payable to or in respect of any such current or
     former employee or consultant of the Company or any ERISA Affiliate thereof
     (under an Employee Plan of the Company or any ERISA Affiliate thereof or
     otherwise).

          (i) Material Adverse Effects.  With respect to Employee Plans of the
              ------------------------                                        
     Company or any ERISA Affiliate thereof, no event has occurred and there
     exists no condition or set of circumstances in connection with which the
     Company or any ERISA Affiliate thereof could be subject to any liability
     under the terms of such Employee Plans, ERISA, the Code, or any other
     applicable Law, other than any condition or set of circumstances that would
     not have a Material Adverse Effect on the Company or any ERISA Affiliate
     thereof.

          (j) Copies of Documentation.  Included in Section 4.14(j) of the
              -----------------------               ---------------       
     Company Disclosure Letter is a list of all Employee Plans of the Company.
     The Company has delivered pursuant to this Agreement a true and complete
     set of copies of (i) all Employee Plans of the Company or any ERISA
     Affiliate thereof (including without limitation, employment agreements) and
     related trust agreements, annuity contracts or other funding instruments as
     in effect immediately prior to the date hereof, together with all
     amendments thereto which will become effective at a later date; (ii) the
     latest IRS determination letter obtained with respect to any such Employee
     Plan qualified or exempt under section 401 or 501 of the Code; (iii) Forms
     5500 including all schedules, attachments, and certified financial
     statements for the most recently completed three fiscal years for each
     Employee Plan of the Company or any ERISA Affiliate thereof required to
     file such form, together with

                                       27
<PAGE>
 
     the most recent actuarial report, if any, prepared by the such Employee's
     Plan's enrolled actuary; (iv) all summary plan descriptions for each
     Employee Plan of the Company or any ERISA Affiliate thereof required to
     prepare, file and distribute summary plan descriptions; (v) all summaries
     furnished or made available to employees, officers and directors of the
     Company or any ERISA Affiliate thereof of all incentive compensation, other
     plans and fringe benefits for which a summary plan description is not
     required; (vi) current registration statements on Form S-8 and amendments
     thereto with respect to any Employee Plan of the Company or any ERISA
     Affiliate thereof; (vii) the notifications to employees of their rights
     under COBRA with respect to each Welfare Plan of the Company or any ERISA
     Affiliate thereof subject to COBRA; and (viii) the Indemnification
     Agreements.

          (k) No collective bargaining agreement to which the Company or any of
     its Subsidiaries is a party is currently in effect or is being negotiated
     by the Company or any of its Subsidiaries.  There is no pending or, to the
     Knowledge of the Company, threatened labor dispute, strike or work stoppage
     against the Company or any of its Subsidiaries that would have a Material
     Adverse Effect on the Company.  Neither the Company or any of its
     Subsidiaries nor any representative or employee of the Company or any of
     its Subsidiaries has in the United States committed any unfair labor
     practices in connection with the operation of the business of the Company
     and its Subsidiaries, and there is no pending or, to the Knowledge of the
     Company, threatened charge or complaint against the Company or any of its
     Subsidiaries by the National Labor Relations Board or any comparable agency
     of any state of the United States.

      Section 4.15  Taxes.  Except as set forth in Section 4.15 of the Company's
                    -----                          ------------                 
Disclosure Letter, all Tax Returns required to be filed by or on behalf of the
Company, each of its Subsidiaries, and each affiliated, combined, consolidated
or unitary group of which the Company or any of its Subsidiaries is or has been
a member have been timely filed, and all such Tax Returns are true, complete and
correct except to the extent any failure to file, or any incompletions or
inaccuracies in, filed Tax Returns would not, individually or in the aggregate,
have a Material Adverse Effect on the Company (it being understood that the
representations and warranties made in this Section 4.15, to the extent that
                                            ------------                    
they relate to  any group of which the Company or any of its Subsidiaries were
not the common parent, are made to the Knowledge of the Company and its
Subsidiaries).  All Taxes due and owing by or with respect to the Company or any
Subsidiary of the Company have been timely paid, or adequately reserved for,
except to the extent any failure to pay or reserve would not, individually or in
the aggregate, have a Material Adverse Effect on the Company. There is no audit,
examination, claimed deficiency, refund litigation, proposed adjustment or
matter in controversy regarding any Taxes due and owing by or with respect to
the Company or any Subsidiary of the Company that would, individually or in the
aggregate, have a Material Adverse Effect on the Company.  All assessments for
Taxes due and owing by or with respect to the Company or any Subsidiary of the
Company with respect to completed and settled examinations or concluded
litigation have been paid.  Prior to the date of this Agreement, the Company has
provided Acquiror with written schedules setting forth (ii the taxable years of
the Company for which the statutes of limitations with respect to federal and
Material state income taxes have not expired and (iv with respect to federal and
Material state income taxes, those years for which examinations have been

                                       28
<PAGE>
 
completed, those years for which examinations are presently being conducted, and
those years for which examinations have not yet been initiated.  Except as set
forth in Section 4.15 of the Company's Disclosure Letter, none of the Company or
         ------------                                                           
any of its Subsidiaries is a party to any agreement, contract, arrangement or
plan, whether written or oral, that has resulted or would result, individually
or in the aggregate, in the payment of any "excess parachute payments" within
the meaning of Section 280G of the Code.  The Company and each of its
Subsidiaries have complied in all material respects with all rules and
Regulations relating to the payment and withholding of Taxes, except to the
extent any such failure to comply would not, individually or in the aggregate,
have a Material Adverse Effect on the Company.  Neither the Company nor any of
its Subsidiaries (i) has waived any statutory period of limitations in respect
of its or their Taxes or Tax Returns or (ii) is a party to, bound by, or has any
obligation under any Tax sharing, allocation, indemnity, or similar contract or
arrangement.

      Section 4.16   Environmental Matters.  Except for matters disclosed in
                     ---------------------                                  
Section 4.16 of the Company's Disclosure Letter and except for matters that,
- ------------                                                                
individually or in the aggregate, would not have a Material Adverse Effect on
the Company, (a) the properties, operations and activities of the Company and
its Subsidiaries are in compliance with all applicable Environmental Laws; (b)
the Company and its Subsidiaries and the properties and operations of the
Company and its Subsidiaries are not subject to any existing, pending or, to the
Knowledge of the Company, threatened action, suit, investigation, inquiry or
proceeding by or before any Court or Governmental Authority under any
Environmental Law; (c) all Permits, if any, required to be obtained or filed by
the Company or any of its Subsidiaries under any Environmental Law in connection
with the business of the Company and its Subsidiaries have been obtained or
filed and are valid and currently in full force and effect; (d) there has been
no release of any hazardous substance, pollutant or contaminant into the
environment in violation of applicable Environmental Laws by the Company or its
Subsidiaries or in connection with their properties or operations; (e) there has
been no exposure (attributable to the action of the Company or its Subsidiaries)
of any Person or property to any hazardous substance, pollutant or contaminant
in violation of applicable Environmental Laws in connection with the properties,
operations and activities of the Company and its Subsidiaries; and (f) the
Company and its Subsidiaries have made available to the Acquiror all internal
and external environmental audits, studies and reports and all correspondence on
substantial environmental matters (in each case relevant to the Company or any
of its Subsidiaries) in the possession of the Company or its Subsidiaries.

      Section 4.17   Intellectual Property.  The Company or one or more of its
                     ---------------------                                    
Subsidiaries own, or hold valid licenses under, or otherwise have the right to
use or sublicense, all foreign and domestic patents, trademarks (common law and
registered), trademark registration applications, service marks (common law and
registered), service mark registration applications, trade names and copyrights,
copyright applications, trade secrets, know-how and other proprietary
information as are necessary for the conduct of the business of the Company and
its Subsidiaries as currently conducted except for any such intellectual
property as to which the failure to own or hold licenses would not in the
aggregate have a Material Adverse Effect on the Company.  Except as set forth in
                                                                                
Section 4.17 of the Company's Disclosure Letter, neither the Company nor any of
- ------------                                                                   
its Subsidiaries is currently in receipt of any notice of infringement or notice
of conflict with the asserted rights of others in any

                                       29
<PAGE>
 
patents, trademarks, service marks, trade names, trade secrets, copyrights and
other proprietary rights owned or held by other Persons, except, in each case,
for matters that would not in the aggregate have a Material Adverse Effect on
the Company. Neither the execution and delivery of this Agreement nor
consummation of the transactions contemplated hereby will violate or breach the
terms of or cause any cancellation of any Material license held by the Company
or any of its Subsidiaries under any patent, trademark, service mark, trade
name, trade secret or copyright. Except as set forth in Section 4.17, of the
                                                        ------------
Company's Disclosure Letter, no claim of infringement of any patent, copyright,
trade secret, or other proprietary right is pending against the Company.

      Section 4.18   Insurance.  The Company and its Subsidiaries own and are
                     ---------                                               
beneficiaries under all such insurance policies/fidelity bonds underwritten by
reputable insurers/sureties that, as to risks insured, coverages and related
limits and deductibles, are customary in the industries in which the Company and
its Subsidiaries operate. To the Knowledge of the Company, all such
policies/bonds are in full force and effect and all premiums due thereon have
been paid.  Section 4.18 of the Company's Disclosure Letter sets forth a list,
            ------------                                                      
including the name of the underwriter/surety, the risks insured, coverage and
related limits and deductibles, expiration dates and significant riders, of the
principal insurance policies/fidelity bonds currently maintained by the Company
and its Subsidiaries.

      Section 4.19  Pooling; Tax Matters.  To the Knowledge of the Company after
                    --------------------                                        
due investigation, neither the Company nor any of its Affiliates has taken or
agreed to take any action or failed to take any action that would prevent (a)
the Merger from being treated for financial accounting purposes as a "pooling of
interests" in accordance with GAAP and the Regulations and interpretations of
the Commission or (b) the Merger from constituting a reorganization within the
meaning of Section 368(a) of the Code.

      Section 4.20  Affiliates.  Section 4.20 of the Company's Disclosure Letter
                    ----------   ------------                                   
contains a true and complete list of all Persons who, to the Knowledge of the
Company, may be deemed to be Affiliates of the Company, excluding all its
Subsidiaries but including all directors and executive officers of the Company.

      Section 4.21  Brokers.  No broker, finder, investment banker or other
                    -------                                                
Person (other than Prudential Securities, Inc.) is entitled to any brokerage,
finder's or other fee or commission in connection with the transactions
contemplated by this Agreement based upon arrangements made by or on behalf of
the Company.  Prior to the date of this Agreement, the Company has made
available to the Acquiror a complete and correct copy of all agreements between
the Company and Prudential Securities, Inc. pursuant to which such firm will be
entitled to any payment relating to the transactions contemplated by this
Agreement.

      Section 4.22  Opinion of Financial Advisor.  The Board of Directors of the
                    ----------------------------                                
Company has received the opinion of Prudential Securities, Inc., the Company's
financial advisor, substantially to the effect that the consideration to be
received by the holders of the Company Common Stock in the Merger is fair to
such holders from a financial point of view, a copy of which has been provided
to the Acquiror.

                                       30
<PAGE>
 
                                   ARTICLE V

                  REPRESENTATIONS AND WARRANTIES OF ACQUIROR

     The Acquiror Companies hereby represent and warrant to the Company that:

     Section 5.1   Organization and Qualification; Subsidiaries.  The Acquiror,
                   --------------------------------------------                
Newco and each other Subsidiary of the Acquiror are legal entities duly
organized, validly existing and in good standing under the Laws of their
respective jurisdictions of incorporation or organization, have all requisite
power and authority to own, lease and operate their respective properties and to
carry on their business as it is now being conducted and are duly qualified and
in good standing to do business in each jurisdiction in which the nature of the
business conducted by them or the ownership or leasing of their respective
properties makes such qualification necessary, other than any matters, including
the failure to be so duly qualified and in good standing, that would not
individually or in the aggregate have a Material Adverse Effect on the Acquiror.
Section 5.1 of the Acquiror's Disclosure Letter sets forth, as of the date of
- -----------                                                                  
this Agreement, a true and complete list of all Significant Subsidiaries of the
Acquiror, together with the jurisdiction of incorporation of each such
Subsidiary and the percentage of each such Subsidiary's outstanding capital
stock or other equity interests owned by the Acquiror or another Subsidiary of
the Acquiror.  Neither the Acquiror, Newco nor any other Subsidiary of the
Acquiror owns an equity interest in any partnership or joint venture arrangement
or other business entity that is Material to the Acquiror.

     Section 5.2   Articles of Incorporation; Bylaws.  The Acquiror has
                   ---------------------------------                   
heretofore marked for identification and furnished to the Company complete and
correct copies of the articles of incorporation and the bylaws or the equivalent
organizational documents, in each case as amended or restated to the date
hereof, of the Acquiror and each of its Significant Subsidiaries. None of the
Acquiror, Newco or any of the Acquiror's Significant Subsidiaries is in
violation of any of the provisions of its articles of incorporation or bylaws
(or equivalent organizational documents).

     Section 5.3   Capitalization.
                   -------------- 

             (a)   The authorized capital stock of the Acquiror consists of (i)
     60,000,000 shares of Acquiror Common Stock of which as of February 25,
     1998, 24,311,832 shares were issued and outstanding, all of which are duly
     authorized, validly issued, fully paid and nonassessable and, were not
     issued in violation of any preemptive or similar rights of any Person, and
     (ii) 1,000,000 shares of Preferred Stock, par value $.01 per share, of
     which none is issued.  Since February 25, 1998, the Acquiror as not issued
     any shares of Acquiror Common Stock, except pursuant to the exercise of
     outstanding Acquiror Stock Options and otherwise to the extent set forth in
     Subsection 5.3(a) of the Acquiror's Disclosure Letter. Except as set forth
     -----------------                                                         
     in Subsection 5.3(a) of the Acquiror's Disclosure Letter, since January 22,
        -----------------                                                       
     1998, the Acquiror has not granted any options for, or other rights to
     purchase, shares of the capital stock of the Acquiror.

                                       31
<PAGE>
 
             (b)   Except as set forth in Subsection 5.3(b) of the Acquiror's
                                          -----------------                  
     Disclosure Letter or in the Acquiror's Consolidated Financial Statements,
     no shares of capital stock of Acquiror are reserved for issuance, and there
     are no contracts, agreements, commitments or arrangements obligating the
     Acquiror (i) to offer, sell, issue, grant, pledge, dispose of or encumber
     any shares of, or any options, warrants or rights of any kind to acquire
     any shares of, or any securities that are convertible into or exchangeable
     for any shares of, capital stock of the Acquiror, (ii) to redeem, purchase
     or acquire, or offer to purchase or acquire, any outstanding shares of, or
     any outstanding options, warrants or rights of any kind to acquire any
     shares of, or any outstanding securities that are convertible into or
     exchangeable for any shares of, capital stock of the Acquiror or (iii) to
     grant any Lien on any shares of capital stock of the Acquiror.

             (c)   (i) All the issued and outstanding shares of capital stock
     of, or other equity interests in, each Subsidiary of the Acquiror are owned
     by the Acquiror or one of its Subsidiaries, have been duly authorized and
     are validly issued, and, with respect to capital stock, are fully paid and
     nonassessable, and were not issued in violation of any preemptive or
     similar rights of any Person; (ii) all such issued and outstanding shares,
     or other equity interests, that are owned by the Acquiror or one of its
     Subsidiaries are owned free and clear of all Liens; (iii) no shares of
     capital stock of, or other equity interests in, any Subsidiary of the
     Acquiror are reserved for issuance, and there are no contracts, agreements,
     commitments or arrangements obligating the Acquiror or any of its
     Subsidiaries (A) to offer, sell, issue, grant, pledge, dispose of or
     encumber any shares of capital stock of, or other equity interests in, or
     any options, warrants or rights of any kind to acquire any shares of
     capital stock of, or other equity interests in, or any securities that are
     convertible into or exchangeable for any shares of capital stock of, or
     other equity interests in, any of the Subsidiaries of the Acquiror or (B)
     to redeem, purchase or acquire, or offer to purchase or acquire, any
     outstanding shares of capital stock of, or other equity interests in, or
     any outstanding options, warrants or rights of any kind to acquire any
     shares of capital stock of or other equity interest in, or any outstanding
     securities that are convertible into or exchangeable for, any shares of
     capital stock of, or other equity interests in, any of the Subsidiaries of
     the Acquiror or (C) to grant any Lien on any outstanding shares of capital
     stock of, or other equity interest in, any of the Subsidiaries of the
     Acquiror; except with respect to clause (i), (ii) or (iii) of this
     Subsection 5.3(c) for such matters that would not in the aggregate have a
     -----------------                                                        
     Material Adverse Effect on the Acquiror.

             (d)   There are no voting trusts, proxies or other agreements,
     commitments or understandings of any character to which the Acquiror or any
     of its Significant Subsidiaries or, to the Knowledge of the Acquiror, any
     third Person is a party or by which the Acquiror or any of its Significant
     Subsidiaries is bound with respect to the voting of any shares of capital
     stock of the Acquiror or any of its Significant Subsidiaries.

     Section 5.4   Authorization of Agreement.  Each of the Acquiror Companies
                   --------------------------                                 
has all requisite corporate power and authority to execute and deliver this
Agreement and each instrument required hereby to be executed and delivered by it
at the Closing, to perform its obligations 

                                       32
<PAGE>
 
hereunder and thereunder and to consummate the transactions contemplated hereby
and thereby. The execution and delivery by the Acquiror Companies of this
Agreement and each instrument required hereby to be executed and delivered by
the Acquiror Companies at the Closing and the performance of their respective
obligations hereunder and thereunder have been duly and validly authorized by
all requisite corporate action (including stockholder action) on the part of the
Acquiror Companies (other than approval of the issuance of shares of Acquiror
Common Stock pursuant to this Agreement by the Stockholders of the Acquiror,
which approval and adoption shall require the affirmative vote of the holders of
not less than a majority of the shares of Acquiror Common Stock present or
represented at the Acquiror's Stockholders' Meeting). This Agreement has been
duly executed and delivered by each of the Acquiror Companies and (assuming due
authorization, execution and delivery hereof by the Company) constitutes a
legal, valid and binding obligation of each of the Acquiror Companies,
enforceable against each of the Acquiror Companies in accordance with its terms,
subject to bankruptcy, insolvency, reorganization, moratorium or similar laws
now or hereafter in effect relating to creditors' rights general or to general
principles of equity.

     Section 5.5   Approvals.  Except for the applicable requirements, if any,
                   ---------                                                  
of (a) the Securities Act, (b) the Exchange Act, (c) state securities or blue
sky Laws, (d) the HSR Act, (e) the NYSE, (f) the filing and recordation of
appropriate merger documents as required by the DGCL and (g) those Laws,
Regulations and Orders noncompliance with which would not have in the aggregate
a Material Adverse Effect on the ability of the Acquiror or Newco to perform its
obligations under this Agreement or a Material Adverse Effect on the Acquiror,
no filing or registration with, no waiting period imposed by and no Permit,
Order or consent of, any Court or Governmental Authority is required under any
Law, Regulation or Order applicable to the Acquiror or any of its Subsidiaries
to permit the Acquiror or Newco to execute, deliver or perform this Agreement or
any instrument required hereby to be executed and delivered by it at the
Closing.

     Section 5.6   No Violation.  Assuming effectuation of all filings and
                   ------------                                           
registrations with, termination or expiration of any applicable waiting periods
imposed by and receipt of all Permits, Orders or consents of, Courts or
Governmental Authorities indicated as required in Section 5.5 hereof, neither
                                                  -----------                
the execution and delivery by the Acquiror or Newco of this Agreement or any
instrument required hereby to be executed and delivered by the Acquiror or Newco
at the Closing nor the performance by the Acquiror or Newco of their respective
obligations hereunder or thereunder will (a) violate or breach the terms of or
cause a default under (i) any Law, Regulation or Order applicable to the
Acquiror or Newco, (ii) the articles of incorporation or bylaws of the Acquiror
or Newco or (iii) any contract, note, bond, mortgage, indenture, license,
agreement or other instrument to which the Acquiror or any of its Subsidiaries
is a party or by which it or any of its properties or assets is bound, or (b)
with the passage of time, the giving of notice or the taking of any action by a
third Person, have any of the effects set forth in clause (a) of this Section
                                                                      -------
5.6, except in any such case for any matters described in this Section 5.6 that
- ---                                                            -----------     
would not have in the aggregate a Material Adverse Effect upon the ability of
the Acquiror or Newco to perform its obligations under this Agreement or a
Material Adverse Effect on the Acquiror.  Prior to the execution of this
Agreement, the Board of Directors of the Acquiror has taken all requisite
actions to cause the transactions contemplated by this Agreement to be exempt
from the provisions of Section 3-601 et. 

                                       33
<PAGE>
 
seq. of the MGCL and to ensure that the execution, delivery and performance of
this Agreement by the Acquiror will not cause any Acquiror Rights to become
exercisable.

     Section 5.7   Reports.
                   ------- 

             (a)   Since January 31, 1994, the Acquiror and its Subsidiaries
     have timely filed (i) all SEC Reports required to be filed with the
     Commission and (ii) all other Reports required to be filed with any other
     Governmental Authorities, including state securities administrators except
     where the failure to file any such Reports would not in the aggregate have
     a Material Adverse Effect on the Acquiror. The Reports, including those
     filed after the date of this Agreement and prior to the Effective Time, (i)
     were prepared in all Material respects in accordance with the requirements
     of applicable Law (including, with respect to the SEC Reports, the
     Securities Act and the Exchange Act, as the case may be and (ii) in the
     case of SEC Reports, did not at the time they were filed contain any untrue
     statement of a Material fact or omit to state a Material fact required to
     be stated therein or necessary to make the statements therein, in the light
     of the circumstances under which they were made, not misleading.

             (b)   The Acquiror's Consolidated Financial Statements and any
     consolidated financial statements of the Acquiror (including any related
     notes thereto) contained in any SEC Reports of the Acquiror filed with the
     Commission since January 31, 1994 (i) have been or will have been prepared
     in accordance with the published Regulations of the Commission and in
     accordance with GAAP consistently applied during the periods involved
     (except (A) to the extent required by changes in GAAP and (B), with respect
     to SEC Reports of the Acquiror filed prior to the date of this Agreement,
     as may be indicated in the notes thereto), and (ii) fairly present the
     consolidated financial position of the Acquiror and its Subsidiaries as of
     the respective dates thereof and the consolidated results of their
     operations and cash flows for the periods indicated (including, in the case
     of any unaudited interim financial statements,  reasonable estimates of
     normal and recurring year-end adjustments).
 
             (c)   There exist no liabilities or obligations of the Acquiror
     and its Subsidiaries that are Material to the Acquiror, whether accrued,
     absolute, contingent or threatened, which would be required to be
     reflected, reserved for or disclosed under GAAP in consolidated financial
     statements of the Acquiror (including the notes thereto) as of and for the
     period ended on the date of this representation and warranty, other than
     (i) liabilities or obligations that are adequately reflected, reserved for
     or disclosed in the Acquiror's Consolidated Financial Statements, (ii)
     liabilities or obligations incurred in the ordinary course of business of
     the Acquiror and its Subsidiaries since November 1, 1997, and (iii)
     liabilities or obligations the incurrence of which are not prohibited by
     Subsection 6.2(b) hereof.
     -----------------

     Section 5.8   No Material Adverse Effect; Conduct.
                   ----------------------------------- 

             (a)   Since January 31, 1997, (i) no event or events (other than
     any event that is directly attributable to the prospect of consummation of
     the Merger or is of general 

                                       34
<PAGE>
 
     application to all or a substantial portion of the Acquiror's industry and
     other than any event that is expressly subject to any other representation
     or warranty contained in this Article V) have, to the Knowledge of the
                                   ---------
     Acquiror, occurred that, individually or in the aggregate, would constitute
     or cause a Material Adverse Effect on the Acquiror and (ii) there have not
     been any change or changes in the business condition (financial or other),
     results of operations, properties, assets or liabilities of the Acquiror or
     its Subsidiaries which would have in the aggregate a Material Adverse
     Effect on the Acquiror.

             (b)   During the period from January 31, 1997 to the date of this
     Agreement, neither the Acquiror nor any of its Subsidiaries has engaged in
     any conduct that is proscribed during the period from the date of this
     Agreement to the Effective Time by subsections (i) through (viii) of
     Subsection 6.2(b) hereof or agreed in writing or otherwise during such
     -----------------                                                     
     period prior to the date of this Agreement to engage in any such conduct.

     Section 5.9   Litigation; Compliance with Laws.  There are no actions,
                   --------------------------------                        
suits, investigations or proceedings (including any proceedings in arbitration)
pending or, to the Knowledge of the Acquiror, threatened against the Acquiror or
any of its Subsidiaries, at law or in equity, in any Court or before or by any
Governmental Authority, except actions, suits or proceedings that (a) are set
forth in Section 5.9 or any other Section of the Acquiror's Disclosure Letter or
         -----------                                                            
(b)  in the aggregate, would not have a Material Adverse Effect on the Acquiror.
Except as set forth in Section 5.9 of the Acquiror's Disclosure Letter, neither
the Acquiror nor any of its Subsidiaries is subject to any written agreement,
directive, memorandum of understanding or Order with or by any Court or
Governmental Authority restricting its operation or requiring any Material
actions.  Except as set forth in Section 5.9 of the Acquiror's Disclosure
Letter, the Acquiror and its Subsidiaries are in compliance with all applicable
Laws and Regulations and are not in default with respect to any Order applicable
to the Acquiror or any of its Subsidiaries, except such events of noncompliance
or defaults that, individually or in the aggregate, would not have a Material
Adverse Effect on the Acquiror.

     Section 5.10  Information in Disclosure Documents and Registration
                   ----------------------------------------------------
Statement.  None of the information to be supplied by the Acquiror for inclusion
- ---------                                                                       
or incorporation by reference in the Proxy Statement or the Registration
Statement to be filed by Acquiror with the SEC will, in the case of the
Registration Statement, at the time it becomes effective and at the Effective
Time, or, in the case of the Proxy Statement or any amendments thereof or
supplements thereto, at the time of the mailing of the Proxy Statement and any
amendments or supplements thereto and at the time of the meetings of
stockholders to be held in connection with the Merger, contain any untrue
statement of a material fact or omit to state any material fact required to be
stated therein or necessary in order to make the statements therein, in light of
the circumstances under which they are made, not mislead  ing.  The Proxy
Statement will comply as to form in all material respects with the provisions of
the Exchange Act, and the Regulations promulgated thereunder.  The Registration
Statement will comply as to form in all material respects with the provisions of
the Securities Act and the Regulations thereunder.

     Section 5.11  Pooling; Tax Matters.  To the Knowledge of the Acquiror
                   --------------------                                   
after due investigation, neither the Acquiror nor any of its Affiliates has
taken or agreed to take any action or 

                                       35
<PAGE>
 
failed to take any action that would prevent (a) the Merger from being treated
for financial accounting purposes as a "pooling of interests" in accordance with
GAAP and the Regulations and interpretations of the Commission or (b) the Merger
from constituting a reorganization within the meaning of Section 368(a) of the
Code.

     Section 5.12  Affiliates.  Section 5.12 of the Acquiror's Disclosure
                   ----------   ------------                             
Letter contains a true and complete list of all Persons who, to the Knowledge of
the Acquiror, may be deemed to be Affiliates of the Acquiror, excluding all its
Subsidiaries but including all directors and executive officers of the Acquiror.

     Section 5.13  Brokers.  No broker, finder, investment banker or other
                   -------                                                
Person (other than Adams, Harkness & Hill, Inc.) is entitled to any brokerage,
finder's or other fee or commission in connection with the transactions
contemplated by this Agreement based upon arrangements made by or on behalf of
the Acquiror.

     Section 5.14  Opinion of Financial Advisor.  The Board of Directors of the
                   ----------------------------                                
Acquiror has received the opinion of Adams, Harkness & Hill, Inc., the
Acquiror's financial advisor, substantially to the effect that the consideration
to be received by the holders of the Company Common Stock in the Merger is fair
to the Acquiror from a financial point of view, a copy of which has been
provided to the Company.
 
     Section 5.15  Operations of Newco.  Newco has been formed solely for the
                   -------------------                                       
purpose of engaging in the transactions contemplated hereby, has engaged in no
other business activities and has conducted its operations only as contemplated
hereby.

     Section 5.16  Proposal to Acquire the Acquiror.  As of the date hereof,
                   --------------------------------                         
there is not pending any bona fide proposal received by the Acquiror regarding
any merger, consolidation, or reorganization of the Acquiror with any other
Person as a result of which less than a majority of the combined voting power of
the securities of the Person surviving such transaction would be held
immediately after such transaction by all the holders of Acquiror Common Stock
immediately prior to such transaction.


                                  ARTICLE VI

                                   COVENANTS

     Section 6.1   Affirmative Covenants.
                   --------------------- 

             (a)   Each of the Company and the Acquiror hereby covenants and
     agrees that, prior to the Effective Time, unless otherwise expressly
     contemplated by this Agreement or consented to in writing by the other, it
     will and will cause its Subsidiaries to operate its business in the usual
     and ordinary course consistent with past practice and use all reasonable
     efforts to preserve substantially intact its business organization,
     maintain its rights and 

                                       36
<PAGE>
 
     franchises, retain the services of its respective key employees and
     preserve the goodwill of those having business relationships with it,
     including customers and suppliers. The Company further covenants and agrees
     that prior to the Effective Time, except as otherwise consented to in
     writing by the Acquiror, it will and will cause its Subsidiaries to
     maintain and keep its properties and assets in as good repair and condition
     as at present, ordinary wear and tear excepted, and use all reasonable
     efforts to keep in full force and effect insurance and bonds comparable in
     amount and scope of coverage to that currently maintained, except in each
     case for any matters that, individually or in the aggregate, would not have
     a Material Adverse Effect on the Company.

             (b)   Each of the Acquiror and Newco hereby covenants and agrees
     that, at the Effective Time, the certificate of incorporation and bylaws of
     Newco will contain indemnification provisions substantially identical to
     those currently contained in Newco's certificate of incorporation and
     bylaws.

     Section 6.2   Negative Covenants.
                   ------------------ 

             (a)   The Company covenants and agrees that, except as set forth in
     Subsection 6.2(a) of the Company's Disclosure Letter or except as expressly
     -----------------                                                          
     contemplated by this Agreement or otherwise consented to in writing by the
     Acquiror, from the date of this Agreement until the Effective Time, it will
     not do, and will not permit any of its Subsidiaries to do, any of the
     following:

                   (i)  (A) make any change in the compensation payable to or to
          become payable to any of its directors, officers or employees, except
          for changes in the ordinary course of business and consistent with
          past practice; (B) grant any severance or termination pay (other than
          pursuant to the normal severance policy of the Company or its
          Subsidiaries as in effect on the date of this Agreement) to, or enter
          into or amend any employment, severance, termination or other similar
          agreement, with, any director, officer or employee, either
          individually or as part of a class of similarly situated Persons; (C)
          establish, adopt or enter into any Employee Plan; (D) except as may be
          required by applicable Law and actions that are not inconsistent with
          the provisions of Section 7.8 of this Agreement, amend (including the
                            -----------                                        
          acceleration of vesting, waiving of performance criteria or the
          adjustment of awards or any other actions permitted upon a change in
          control of such party or a filing under Section 13(d) or 14(d) of the
          Exchange Act with respect to such party) any of the Employee Plans of
          such Person; or (E) make any loans to any of its officers, directors
          or employees or make any changes in its existing borrowing or lending
          arrangements for or on behalf of any such Persons;

                   (ii) declare or to pay any dividend on, or to make any other
          distribution in respect of, outstanding shares of capital stock,
          except for dividends by a wholly-owned Subsidiary of the Company to
          the Company or another wholly-owned Subsidiary of the Company.

                                       37
<PAGE>
 
                   (iii)  (A) redeem, purchase or acquire, or offer to purchase
          or acquire, any outstanding shares of capital stock of, or other
          equity interests in, or any securities that are convertible into or
          exchangeable for any shares of capital stock of, or other equity
          interests in, or any outstanding options, warrants or rights of any
          kind to acquire any shares of capital stock of, or other equity
          interests in, the Company or any of its Subsidiaries; (B) effect any
          reorganization or recapitalization; or (C) split, combine or
          reclassify any of the capital stock of, or other equity interests in,
          the Company or any of its Subsidiaries or issue or authorize or
          propose the issuance of any other securities in respect of, in lieu of
          or in substitution for, shares of such capital stock or such equity
          interests, other than intercompany transfers among the Company and its
          wholly-owned Subsidiaries or among such wholly-owned Subsidiaries;

                   (iv)   (A) offer, sell, issue or grant, or authorize the
          offering, sale, issuance or grant, of any shares of capital stock of,
          or other equity interests in, or any securities convertible into or
          exchangeable for any shares of capital stock of, or other equity
          interests in, or any options, warrants or rights of any kind to
          acquire any shares of capital stock of, or other equity interests in,
          the Company or any of its Subsidiaries, except for unissued shares
          reserved for issuance upon the exercise of outstanding employee stock
          options; (B) amend or otherwise modify the terms (as in effect on the
          date of this Agreement) of any outstanding options, warrants or rights
          of any kind to acquire any shares of capital stock of, or other equity
          interests in, the Company or any of its Subsidiaries the effect of
          which will be to make such terms more favorable to the holders thereof
          (except as may be required by ERISA or other applicable Laws); or (C)
          grant any Lien with respect to any shares of capital stock of, or
          other equity interests in, any Subsidiary of the Company;

                   (v)    acquire or agree to acquire, by merging or
          consolidating with, by purchasing an equity interest in or a portion
          of the assets of, or in any other manner, any business or any
          corporation, partnership, association or other business organization
          or division thereof, or otherwise to acquire any assets of any other
          Person (other than the purchase of assets from suppliers or vendors in
          the ordinary course of business and consistent with past practice);

                   (vi)   sell, lease, exchange or otherwise dispose of, or to
          grant any Lien (other than a Permitted Encumbrance) with respect to,
          any of the assets of the Company or any of its Subsidiaries that are
          Material to the Company or such Subsidiary, except for dispositions of
          assets and inventories in the ordinary course of business and
          consistent with past practice and dispositions of assets and
          incurrence of purchase money Liens incurred in connection with the
          original acquisition of assets and secured by the assets acquired in
          an amount not to exceed $250,000 in the aggregate;

                                       38
<PAGE>
 
                   (vii)  adopt any amendments to its certificate of
          incorporation or bylaws or other organizational documents;

                   (viii) (A) change any of its methods of accounting in effect
          at December 31, 1996, except as may be required to comply with GAAP,
          (B) make or rescind any election relating to Taxes (other than any
          election that must be made periodically that is made consistent with
          past practice), (C) settle or compromise any claim, action, suit,
          litigation, proceeding, arbitration, investigation, audit or
          controversy relating to Taxes (except where the cost to the Company
          and its Subsidiaries of such settlements or compromises, individually
          or in the aggregate, does not exceed $250,000) or (D) change any of
          its methods of reporting income or deductions for U.S. federal income
          tax purposes from those employed in the preparation of the U.S.
          federal income tax returns for the taxable year ending December 31,
          1996, except as may be required by Law;

                   (ix)   incur, assume, guarantee, endorse or otherwise become
          liable or responsible (whether directly, contingently or otherwise)
          for any obligations for borrowed money or purchase money indebtedness
          (other than purchase money indebtedness as to which Liens may be
          granted as permitted by Subsection 6.2(a)(vi) hereof) that are
                                  ---------------------  
          Material to the Company, whether or not evidenced by a note, bond,
          debenture or similar instrument, except drawings under credit/lease
          lines existing at the date of this Agreement, or otherwise in the
          ordinary course of business consistent with past practice (including
          purchase money indebtedness as to which Liens may be granted pursuant
          to Subsection 6.2(a)(vi) hereof);
             ---------------------         

                   (x)    release any third Person from its obligations under
          any existing standstill agreement relating to an Acquisition Proposal
          (as defined herein) or otherwise under any confidentiality agreement
          or similar agreement;

                   (xi)   enter into any Material Contract with any third Person
          (other than customers and vendors in the ordinary course of business)
          which provides for an exclusive arrangement with that third Person or
          is substantially more restrictive on the Company or any of its
          Subsidiaries or substantially less advantageous to the Company or any
          of its Subsidiaries than Material Contracts existing on the date
          hereof;

                   (xii)  propose, adopt, approve or implement any stockholder
          rights plan or similar agreements, which could have the effect of
          restricting, prohibiting, impeding or otherwise affecting the
          consummation of the transactions contemplated by this Agreement, the
          Voting Agreement or the Option Agreement, in each case by the
          respective parties thereto;

                   (xiii) knowingly take or allow to be taken any action which
          would jeopardize the treatment of the Acquiror's acquisition of the
          Company as a pooling 

                                       39
<PAGE>
 
          of interests for accounting purposes or knowingly take any action that
          would jeopar dize qualification of the Merger as a reorganization
          within the meaning of Section 368(a) of the Code; or

                   (xix)  agree in writing or otherwise to do any of the
     foregoing.

             (b)   The Acquiror covenants and agrees that, except as set forth
     in Subsection 6.2(b) of the Acquiror's Disclosure Letter or except as
        -----------------                                                 
     expressly contemplated by this Agreement or otherwise consented to in
     writing by the Company, from the date of this Agreement until the Effective
     Time, it will not do, and will not permit any of its Subsidiaries to do,
     any of the following:

                   (i)    declare or to pay any dividend on, or to make any
          other distribution in respect of, outstanding shares of capital stock,
          except for dividends by a wholly-owned Subsidiary of such Person to
          such Person or another wholly-owned Subsidiary of such Person;

                   (ii)   (A) redeem, purchase or acquire, or offer to purchase
          or acquire, any outstanding shares of capital stock of, or other
          equity interests in, or any securities that are convertible into or
          exchangeable for any shares of capital stock of, or other equity
          interests in, or any outstanding options, warrants or rights of any
          kind to acquire any shares of capital stock of, or other equity
          interests in, the Acquiror or any of its Subsidiaries (other than (1)
          any such acquisition by the Acquiror or any of its wholly-owned
          Subsidiaries directly from any wholly-owned Subsidiary of the Acquiror
          in exchange for capital contributions or loans to such Subsidiary, (2)
          any repurchase, forfeiture or retirement of shares of Acquiror Common
          Stock or Acquiror Stock Options occurring pursuant to the terms (as in
          effect on the date of this Agreement) of any existing Employee Plan of
          the Acquiror or any of its Subsidiaries, (3) any periodic purchase of
          Acquiror Common Stock for allocation to employees' accounts occurring
          pursuant to the terms (as in effect on the date of this Agreement) of
          any existing Employee Plan of the Acquiror or any of its Subsidiaries
          and (4) any redemption, purchase or acquisition by a Subsidiary of the
          Acquiror that would not have a Material Adverse Effect on the
          Acquiror) or (B) effect any reorganization or recapitalization other
          than any reorganization or recapitalization that would not have a
          Material Adverse Effect on the ability of the Acquiror to perform its
          obligations under this Agreement;

                   (iii)  offer, sell, issue or grant, or authorize the
          offering, sale, issuance or grant, of any shares of capital stock of,
          or other equity interests in, any securities convertible into or
          exchangeable for any shares of capital stock of, or other equity
          interests in, or any options, warrants or rights of any kind to
          acquire any shares of capital stock of, or other equity interests in,
          the Acquiror or any of its Subsidiaries, other than issuances of
          Acquiror Common Stock (A) upon the exercise of Acquiror Stock Options
          outstanding at the date of this Agreement in accordance with the terms

                                       40
<PAGE>
 
          thereof (as in effect on the date of this Agreement), (B) upon the
          expiration of any restrictions upon issuance of any grant existing at
          the date of this Agreement of restricted stock or stock bonus pursuant
          to the terms (as in effect on the date of this Agreement) of any
          Employee Plan of the Acquiror or any of its Subsidiaries, or (C) any
          periodic issuance of shares of Acquiror Common Stock or Acquiror Stock
          Options pursuant to the terms (as in effect on the date of this
          Agreement) of any Employee Plan of the Acquiror or any of its
          Subsidiaries, other than any such offer, sale, issuance or grant that
          would not have a Material Adverse Effect on the Acquiror or a Material
          Adverse Effect on the ability of the Acquiror to perform its
          obligations under this Agreement;

                   (iv)   acquire or agree to acquire, by merging or
          consolidating with, by purchasing an equity interest in or a portion
          of the assets of, or in any other manner, any business or any
          corporation, partnership, association or other business organization
          or division thereof, or otherwise to acquire any assets of any other
          Person (other than the purchase of assets from suppliers or vendors in
          the ordinary course of business and consistent with past practice and
          acquisitions of equity interests, assets and businesses that would not
          have a Material Adverse Effect on the Acquiror or the ability of the
          Acquiror to perform its obligations under this Agreement);

                   (v)    sell, lease, exchange or otherwise dispose of, or
          grant any Lien (other than a Permitted Encumbrance) with respect to,
          any of the assets of the Acquiror or any of its Subsidiaries that are
          Material to the Acquiror, except for dispositions of assets in the
          ordinary course of business and consistent with past practice and
          dispositions of assets and incurrences of Liens that would not have a
          Material Adverse Effect on the Acquiror or the ability of the Acquiror
          to perform its obligations under this Agreement;

                   (vi)   adopt any amendments to its charter or bylaws or other
          organizational documents that would alter the terms of the Acquiror's
          Common Stock or would have a Material Adverse Effect on the Acquiror
          or the ability of the Acquiror or Newco to perform its obligations
          under this Agreement;

                   (vii)  incur, assume, guarantee, endorse or otherwise become
          liable or responsible (whether directly, contingently or otherwise)
          for any obligations for borrowed money or purchase money indebtedness
          (other than purchase money indebtedness as to which Liens may be
          granted as permitted by Subsection 6.2(b)(v)) that are Material to the
                                  ---------------------           
          Acquiror, whether or not evidenced by a note, bond, debenture or
          similar instrument, except drawings under credit lines existing at the
          date of this Agreement, obligations incurred in the ordinary course of
          business consistent with past practice and obligations that would not
          have a Material Adverse Effect on the ability of the Acquiror to
          perform its obligations under this Agreement;

                                       41
<PAGE>
 
                   (viii) knowingly take or allow to be taken any action which
          would jeopardize the treatment of the Acquiror's acquisition of the
          Company as a pooling of interests for accounting purposes or knowingly
          take any action that would jeopar dize qualification of the Merger as
          a reorganization within the meaning of Section 368(a) of the Code; or

                   (ix)   agree in writing or otherwise to do any of the
          foregoing.

     Section 6.3   No Solicitation.  From the date of this Agreement until the
                   ---------------                                            
Effective Time or the termination of this Agreement pursuant to Article IX
                                                                ----------
hereof, the Company agrees that the Company and its Subsidiaries will not, and
will cause their respective officers, directors, employees, other agents
(including, without limitation, investment bankers, attorneys or accountants)
not to, directly or indirectly, (i) take any action to solicit, initiate,
encourage, enter into any agreement relating to or otherwise facilitate any
offer or proposal for, or any indication of interest in an Acquisition Pro
posal, (ii) waive any provision of any standstill or similar agreements entered
into by the Company of its Subsidiaries, or (iii) engage in or continue
discussions or negotiations with or otherwise facilitate any effort or attempt
to make or implement an Acquisition Proposal, or disclose any nonpublic
information relating to the Company or its Subsidiaries, respectively, or afford
access to their respective properties, books or records, to any Person that may
be considering making, or has made, an Acquisition Proposal.  Notwithstanding
the foregoing, (i) nothing contained in this Section 6.3 will prohibit the Board
                                             -----------                        
of Directors of the Company from (A) furnishing information to, or entering into
discussions or negotiations with, any Person in connection with an unsolicited
bona fide proposal in writing by such Person with respect to an Acquisition
Proposal, if, and only to the extent that (1) the Board of Directors of the
Company, after consulting with outside legal counsel to the Company, determines
in good faith that such action is required for the Board of Directors of the
Company to comply with its fiduciary duties to stockholders imposed by Law and
(2) prior to furnishing such information to, or entering into discussions or
negotiations with, such Person, the Company provides written notice to the
Acquiror to the effect that it is furnishing information to, or entering into
discussions or negotiations with, such Person and the Company keeps Acquiror
informed of the status of the principal financial terms of any such negotiations
or discussions; or (B) complying with Rule 14e-2 promulgated under the Exchange
Act with regard to an Acquisition Proposal and (ii) taking the actions
contemplated by (i) above under the circumstances described therein will not be
deemed to be a breach of this Agreement.

     Section 6.4   Access and Information.  Each of the parties will, and will
                   ----------------------                                     
cause its Subsidiaries to, (i) afford to the other party and its officers,
directors, employees, accountants, consultants, legal counsel, agents and other
representatives (collectively, the "Representatives") reasonable access at
                                    ---------------                       
reasonable times upon reasonable prior notice to the officers, employees,
agents, properties, offices and other facilities of such party and its
Subsidiaries and to their books and records and (ii) furnish promptly to the
other party and its Representatives such information concerning the business,
properties, contracts, records and personnel of such party and its Subsidiaries
(including financial, operating and other data and information) as may be
reasonably requested, from time to time, by or on behalf of the other party.
All information obtained by the Acquiror or the Company pursuant to this Section
                                                                         -------
6.4 shall be kept confidential in accordance with 
- ---                                                                            

                                       42
<PAGE>
 
the Confidentiality Agreement dated February 5, 1998, as the same has been
amended to date, between the Acquiror and the Company.


                                  ARTICLE VII

                             ADDITIONAL AGREEMENTS

     Section 7.1   Meeting of Stockholders.
                   ----------------------- 

             (a)   The Company, acting through its Board of Directors, shall, in
     accordance with the DGCL and its certificate of incorporation and bylaws
     promptly and duly call, give notice of, convene and hold on the same date
     and at the same time as the Acquiror's Stockholders' Meeting (as defined
     herein), a special meeting of the Company's stockholders to consider
     approval and adoption of this Agreement and the Merger (the "Company
                                                                  -------
     Stockholders' Meeting"), and the Company shall consult with the Acquiror in
     ---------------------                                                      
     connection therewith. Except as may be otherwise required for the Board of
     Directors of the Company to comply with its fiduciary duties to
     stockholders imposed by Law as set forth in Section 6.3 hereof, the Board
                                                 -----------                  
     of Directors of the Company shall recommend approval and adoption of this
     Agreement and the transactions contemplated hereby by the stockholders of
     the Company and include in the Registration Statement and Proxy Statement a
     copy of such recommendations.  Except as the Board of Directors of the
     Company, after consultation with outside legal counsel, shall determine in
     good faith to be required to comply with its fiduciary duty to stockholders
     imposed by law as set forth in Section 6.3, the Company shall use all
     reasonable efforts to solicit from stockholders of the Company proxies in
     favor of the approval and adoption of this Agreement and the Merger and to
     secure the vote or consent of stockholders required by the DGCL and its
     certificate of incorporation and bylaws to approve and adopt this Agreement
     and the Merger.

             (b)   The Acquiror, acting through its Board of Directors, shall,
     in accordance with the MGCL and its articles of incorporation and bylaws
     promptly and duly call, give notice of, convene and hold, on the same date
     and at the same time as the Company's Stockholders' Meeting, a special
     meeting of the Acquiror's stockholders to consider approval of the issuance
     of the shares of Acquiror Common Stock contemplated by this Agreement (the
     "Acquiror's Stockholders' Meeting", and together, with the Company
      --------------------------------                                 
     Stockholders' Meeting, the "Stockholders' Meetings") and the Acquiror shall
                                 ----------------------                         
     consult with the Company in connection therewith.  Except as the Board of
     Directors of the Acquiror, after consultation with outside legal counsel,
     shall determine in good faith to be required to comply with its fiduciary
     duty to stockholders imposed by Law, the Board of Directors of the Acquiror
     shall recommend approval and adoption of this Agreement and the
     transactions contemplated hereby by the stockholders of the Acquiror and
     include in the Registration Statement and Proxy Statement a copy of such
     recommendation.  Except as the Board of Directors, after consultation with
     outside legal counsel, shall determine in good faith to be required to
     comply with its fiduciary duty to stockholders imposed by Law, the Acquiror
     shall use all 

                                       43
<PAGE>
 
     reasonable efforts to solicit from stockholders of the Acquiror proxies in
     favor of the issuance of such shares of Acquiror Common Stock and to secure
     the vote or consent of stockholders required by the NYSE and its articles
     of incorporation and bylaws to approve such issuance.

     Section 7.2   Registration Statement; Proxy Statements.
                   ---------------------------------------- 

             (a)   As promptly as practicable after the execution of this
     Agreement, the Acquiror Companies will prepare and file with the Commission
     the Registration Statement and Proxy Statement. Each of the Acquiror
     Companies and the Company will use all reasonable efforts to have or cause
     the Registration Statement to become effective as promptly as practicable,
     and will take any action required to be taken under any applicable federal
     or state securities Laws in connection with the issuance of shares of
     Acquiror Common Stock in the Merger. The Acquiror Companies will use all
     reasonable efforts to cause the Registration Statement to remain effective
     through the Effective Time. Each of the Acquiror Companies and the Company
     will furnish all information concerning it and the holders of its capital
     stock as the other may reasonably request in connection with such actions.
     As promptly as practicable after the Registration Statement shall have
     become effective, the Company and the Acquiror will each mail the Proxy
     Statement to its respective stockholders entitled to notice of and to vote
     at the Company Stockholders' Meeting or the Acquiror Stockholders' Meeting,
     as applicable. Except as the Company's Board of Directors may otherwise
     determine in good faith, after consultation with outside counsel, to be
     necessary to comply with its fiduciary duty to stockholders as imposed by
     Law, the Proxy Statement will include the recommendation of the Company's
     Board of Directors in favor of the Merger. Except as the Acquiror's Board
     of Directors may otherwise determine in good faith, after consultation with
     outside counsel, to be necessary to comply with its fiduciary duty to
     stockholders as imposed by Law, the Proxy Statement will include the
     recommendation of the Acquiror's Board of Directors in favor of the
     issuance of shares of Acquiror Common Stock pursuant to the Merger. Subject
     in each case to compliance with their fiduciary duties to their
     stockholders, at the other's Stockholders' Meetings, each of the Acquiror
     and the Company shall vote in favor of approval and adoption of this
     Agreement or the issuance of Acquiror Common Stock in the Merger, as
     applicable, all Acquiror Common Stock or Company Common Stock, as the case
     may be, as to which it holds proxies at such time.

             (b)   If at any time prior to the Effective Time any event or
     circumstance relating to the Company or any of its Affiliates, or its or
     their respective officers or directors, should be discovered by the Company
     that should be set forth in an amendment to the Registration Statement or a
     supplement to the Proxy Statement, the Company will promptly inform the
     Acquiror, and the Company will undertake to amend or supplement the Proxy
     Statement accordingly.

             (c)   If at any time prior to the Effective Time any event or
     circumstance relating to the Acquiror or any of its Affiliates, or to their
     respective officers or directors, should be 

                                       44
<PAGE>
 
     discovered by the Acquiror that should be set forth in an amendment to the
     Registration Statement or a supplement to the Proxy Statement, the Acquiror
     will promptly inform the Company, and they will undertake to amend or
     supplement the Registration Statement, the prospectus contained therein
     and/or the Proxy Statement accordingly.

             (d)   No amendment or supplement to the Registration Statement or
     the Proxy Statement will be made by the Acquiror or the Company without
     prior consultation with the other party. The Acquiror and the Company each
     will advise the other, promptly after it receives notice thereof, of the
     time when the Registration Statement has become effective or any supplement
     or amendment has been filed, the issuance of any stop order suspending the
     effectiveness of the Registration Statement or the solicitation of proxies
     pursuant to the Proxy Statement, the suspension of the qualification of the
     Acquiror Common Stock issuable in connection with the Merger for offering
     or sale in any jurisdiction, any request by the staff of the Commission for
     amendment of the Registration Statement or the Proxy Statement, the receipt
     from the staff of the Commission of comments thereon or any request by the
     staff of the Commission for additional information with respect thereto.

     Section 7.3   Appropriate Action; Consents; Filings.
                   ------------------------------------- 

             (a)   The Company and the Acquiror will each use all reasonable
     efforts (i) to take, or to cause to be taken, all appropriate action, and
     to do, or to cause to be done, all things necessary, proper or advisable
     under applicable Law or otherwise to consummate and make effective the
     transactions contemplated by this Agreement, (ii) to obtain from any
     Governmental Authorities any Permits or Orders required to be obtained by
     the Acquiror or the Company or any of their Subsidiaries in connection with
     the authorization, execution, delivery and performance of this Agreement
     and the consummation of the transactions contemplated hereby, including the
     Merger, (iii) to make all necessary filings, and thereafter make any other
     required submissions, with respect to this Agreement and the Merger
     required under (A) the Securities Act and the Exchange Act, and any other
     applicable federal or state securities Laws, (B) the HSR Act, and (C) any
     other applicable Law; provided that the Acquiror and the Company will
     cooperate with each other in connection with the making of all such
     filings, including providing copies of all such documents to the nonfiling
     party and its advisors prior to filings and, if requested, will accept all
     reasonable additions, deletions or changes suggested in connection
     therewith. The Company and the Acquiror will furnish all information
     required for any application or other filing to be made pursuant to any
     applicable Law or any applicable Regulations of any Governmental Authority
     (including all information required to be included in the Proxy Statement
     or the Registration Statement) in connection with the transactions
     contemplated by this Agreement.

             (b)   Each of the Company and the Acquiror will give prompt notice
     to the other of (i) any notice or other communication from any Person
     alleging that the consent of such Person is or may be required in
     connection with the Merger, (ii) any notice or other communication from any
     Governmental Authority in connection with the Merger, (iii) any actions,
     suits, claims, investigations or proceedings commenced or threatened in
     writing 

                                       45
<PAGE>
 
     against, relating to or involving or otherwise affecting the Company, the
     Acquiror or their respective Subsidiaries that relate to the consummation
     of the Merger; (iv) the occurrence of a default or event that, with notice
     or lapse of time or both, will become a default under any Material Contract
     of the Acquiror or Material Contract of the Company; and (v) any change
     that is reasonably likely to have a Material Adverse Effect on the Company
     or the Acquiror or is likely to delay or impede the ability of either the
     Acquiror or the Company to consummate the transactions contemplated by this
     Agreement or to fulfill their respective obligations set forth herein.

             (c)   The Acquiror Companies and the Company agree to cooperate and
     use all reasonable efforts vigorously to contest and resist any action,
     including legislative, administrative or judicial action, and to have
     vacated, lifted, reversed or overturned any Order (whether temporary,
     preliminary or permanent) of any Court of Governmental Authority that is in
     effect and that restricts, prevents or prohibits the consummation of the
     Merger or any other transactions contemplated by this Agreement. Each of
     the Acquiror Companies and the Company also agree to take any and all
     actions, including the disposition of assets or the withdrawal from doing
     business in particular jurisdictions, required by any Court or Governmental
     Authority as a condition to the granting of any Permit or Order necessary
     for the consummation of the Merger or as may be required to avoid, lift,
     vacate or reverse any legislative or judicial action which would otherwise
     cause any condition to Closing not to be satisfied; provided, however, that
     in no event will either party be required to take, any action that would
     have an Material Adverse Effect on such party.

             (d)   (i)    Each of the Company and Acquiror will give (or will
             cause their respective Subsidiaries to give) any notices to third
             Persons, and use, and cause their respective Subsidiaries to use,
             all reasonable efforts to obtain any consents from third Persons
             (A) necessary, proper or advisable to consummate the transactions
             contemplated by this Agreement, (B) otherwise required under any
             contracts, licenses, leases or other agreements in connection with
             the consummation of the transactions contemplated hereby or (C)
             required to prevent a Material Adverse Effect on the Company or the
             Acquiror from occurring prior to or after the Effective Time.

                   (ii)   If any party shall fail to obtain any consent from a
             third Person described in Subsection 7.3(d)(i) above, such party
                                       -------------------- 
             will use all reasonable efforts, and will take any such actions
             reasonably requested by the other parties, to limit the adverse
             effect upon the Company and Acquiror, their respective
             Subsidiaries, and their respective businesses resulting, or which
             would result after the Effective Time, from the failure to obtain
             such consent.

                                       46
<PAGE>
 
     Section 7.4   Affiliates; Pooling; Tax Treatment.
                   ---------------------------------- 

             (a)   The Company will use all reasonable efforts to obtain an
     executed letter agreement substantially in the form of Annex C hereto from
                                                            ------- 
     (i) each Person identified in Section 4.20 of the Company's Disclosure
                                   ------------
     Letter within 15 days following the execution and delivery of this
     Agreement and (ii) from any Person who may be deemed to have become an
     Affiliate of the Company after the date of this Agreement and prior to the
     Effective Time as soon as practicable after attaining such status.

             (b)   The Acquiror will use all reasonable efforts to obtain an
     executed letter agreement substantially in the form of Annex D hereto from
     (i) each Person identified in Section 5.12 of the Acquiror's Disclosure
     Letter within 15 days following the execution and delivery of this
     Agreement and (ii) from any Person who may be deemed to have become an
     Affiliate of the Acquiror after the date of this Agreement and prior to the
     Effective Time as soon as practicable after attaining such status.

             (c)   The Acquiror Companies will not be required to maintain the
     effectiveness of the Registration Statement for the purpose of resale by
     stockholders of the Company who may be Affiliates of the Company pursuant
     to Rule 145 under the Securities Act.

             (d)   Each party hereto will use all reasonable efforts to cause
     the Merger to be treated for financial accounting purposes as a "pooling of
     interests" and will not take, and will use all reasonable efforts to
     prevent any Affiliate of such party from taking, any actions which could
     prevent the Merger from being treated for financial accounting purposes as
     a "pooling of interests" under GAAP.

             (e)   The parties hereto intend that the Merger will qualify as a
     reorganization within the meaning of Section 368(a) of the Code.  Each of
     the parties hereto shall, and shall cause its respective Subsidiaries to,
     and shall use its reasonable best efforts to cause the Merger to so
     qualify.

     Section 7.5   Public Announcements.  The parties will consult with each
                   --------------------                                     
other and will mutually agree upon any press release or public announcement
pertaining to the Merger and shall not issue any such press release or make any
such public announcement prior to such consultation and agreement, except as may
be required by applicable law or by obligations pursuant to any listing
agreement with any national securities exchange or national automated quotation
system, in which case the party proposing to issue such press release or make
such public announcement shall use reasonable efforts to consult in good faith
with the other party before issuing any such press release or making any such
public announcement.

     Section 7.6   Stock Exchange Listing.  The Acquiror will use all
                   ----------------------                            
reasonable efforts to cause the shares of Acquiror Common Stock (and the
associated Acquiror Rights) to be issued in the Merger to be approved for
listing (subject to official notice of issuance) on the NYSE prior to the
Effective Time.  To the Knowledge of the Acquiror, there are no facts and
circumstances that would 

                                       47
<PAGE>
 
preclude the Acquiror Common Stock (and the associated Acquiror Rights) to be
issued in the Merger from being approved for listing on the NYSE.

     Section 7.7   Employee Benefit Plans.
                   ---------------------- 

             (a)   Except for obligations of the Company and its ERISA
     Affiliates that are in violation of the provisions of Subsection 6.2(a)
                                                           -----------------  
     hereof, the Acquiror hereby acknowledges and agrees to honor and to cause
     the Surviving Corporation and its Subsidiaries to honor and perform all
     obligations of the Surviving Corporation and its Subsidiaries (including
     COBRA obligations) under all Employee Plans of the Company and its
     Subsidiaries, in accordance with their terms, including without limitation,
     the Indemnification Agreements set forth in Subsection 4.13 of the
                                                 ---------------  
     Company's Disclosure Letter.

             (b)   The Acquiror will cause the Surviving Corporation to maintain
     through December 31, 1998 (the "Benefit Continuation Period"), the Employee
                                     ---------------------------                
     Plans of the Company and its Subsidiaries set forth in Subsection 4.14(i)
                                                            ------------------
     of the Company's Disclosure Letter, substantially as in effect immediately
     prior to the Effective Time.

             (c)   From and after the Effective Time, including the Benefit
     Continuation Period, the Acquiror will grant to all individuals who are
     employed by the Company or its Subsidiaries on the Closing Date credit for
     all their service prior to the Effective Time with the Company and its
     Subsidiaries (and the respective predecessors of such entities) under all
     Employee Plans of the Acquiror and its Subsidiaries in which such employees
     will become eligible to participate, as if such service was service with
     the Acquiror or any Subsidiary thereof.  With respect to individuals who
     are employed by the Company or its Subsidiaries as of the Effective Time,
     Acquiror will waive all actively-at-work requirements and pre-existing
     condition limitations or exclusions under the Welfare Plans of the Acquiror
     and its Subsidiaries which provide medical, dental, or vision benefits or
     coverage (provided, however, that no such waiver will apply to a pre-
     existing condition of any employee of the Company or its Subsidiaries who
     was, as of the Effective Time, excluded from participation in a similar
     Welfare Plan of the Company or its Subsidiaries due to such pre-existing
     condition).  Furthermore, any covered expenses incurred on or before the
     Effective Time by an employee (or a covered dependent thereof) of the
     Company or its Subsidiaries under the Welfare Plans of the Company and its
     Subsidiaries which provide medical, dental, or vision benefits or coverage
     will be taken into account for purposes of satisfying any applicable
     deductible, coinsurance, and out-of-pocket maximum provisions under the
     Welfare Plans of the Acquiror and its Subsidiaries.

     Section 7.8   Indemnification of Directors and Officers.
                   ----------------------------------------- 

             (a)   Until six (6) years from the Effective Time, the certificate
     of incorporation and bylaws of the Surviving Corporation as in effect
     immediately after the Effective Time will not be amended to reduce or limit
     the rights of indemnity afforded to the present and former directors and
     officers of the Company thereunder, to reduce or limit the ability of the

                                       48
<PAGE>
 
     Company to indemnify such Persons, or to hinder, delay or make more
     difficult the exercise of such rights of indemnity or the ability to
     indemnify. The Surviving Corporation will at all times exercise the powers
     granted to it by its certificate of incorporation, its bylaws and
     applicable Law to indemnify to the fullest extent possible the present and
     former directors, officers, employees and agents of the Company against
     claims made against them arising from their service in such capacities
     prior to the Effective Time.

             (b)   If any claim or claims shall, subsequent to the Effective
     Time and within six (6) years thereafter, be made against any present or
     former director, officer, employee or agent of the Company based on or
     arising out of the services of such Person prior to the Effective Time in
     the capacity of such Person as a director, officer, employee or agent of
     the Company, the provisions of Subsection 7.8(a) hereof respecting the
                                    ----------------- 
     certificate of incorporation and bylaws of the Surviving Corporation will
     continue in effect until the final disposition of all such claims.

             (c)   The Acquiror hereby agrees after the Effective Time to
     guarantee the payment of the Surviving Corporation's indemnification
     obligations described in Subsection 7.8(a) hereof.
                              ----------------

             (d)   Notwithstanding subsection (a), (b) or (c) of this Section 
                                                                      ------- 
     7.8, the Acquiror and the Surviving Corporation will be released from the
     ----
     obligations imposed by such subsection if the Acquiror will assume the
     obligations of the Surviving Corporation thereunder by operation of Law or
     otherwise.  Notwithstanding anything to the contrary in this Section 7.8,
                                                                  ----------- 
     neither the Acquiror nor the Surviving Corporation will be liable for any
     settlement effected without its written consent, which will not be
     unreasonably withheld or delayed.

             (e)   The Acquiror will cause to be maintained in effect until six
     (6) years from the Effective Time the current policies of directors' and
     officers' liability insurance maintained by the Company (or substitute
     policies providing at least the same coverage and limits and containing
     terms and conditions that are not materially less advantageous) with
     respect to claims arising from facts or events which occurred before the
     Effective Time; provided, however, that in no event will the Acquiror or
     the Surviving Corporation be required to expend more than two hundred
     percent (200%) of the current annual premiums paid by the Company for such
     insurance; provided, further, that, if the Acquiror or the Surviving
     Corporation is unable to obtain insurance for any period for two hundred
     percent (200%) of the current annual premiums, then the obligation of the
     Acquiror and the Surviving Corporation pursuant hereto will be to obtain
     the best coverage reasonably available under the circumstances subject to
     the foregoing limitations on premiums.

             (f)   The provisions of this Section 7.8 are intended to be for the
                                          -----------                           
     benefit of, and will be enforceable by, each Person entitled to
     indemnification hereunder and the heirs and representatives of such Person.

                                       49
<PAGE>
 
             (g)   The Acquiror will not, and will not permit the Surviving
     Corporation to, merge or consolidate with any other Person unless the
     Surviving Corporation will ensure that the surviving or resulting entity
     assumes the obligations imposed by subsections (a), (b), (c) and (e) of
     this Section 7.8.
          ----------- 

     Section 7.9   Newco.  Prior to the Effective Time, Newco will not conduct
                   -----                                                      
any business or make any investments other than as specifically contemplated by
this Agreement and will not have any assets (other than the minimum amount of
cash required to be paid to Newco for the valid issuance of its stock to the
Acquiror).  The Acquiror will take all action necessary to cause Newco to
perform its obligations under this Agreement and to consummate the Merger on the
terms and conditions set forth in this Agreement.

     Section 7.10  Event Notices.  From and after the date of this Agreement
                   -------------                                            
until the Effective Time, each party hereto will promptly notify the other party
hereto of (i) the occurrence or nonoccurrence of any event the occurrence or
nonoccurrence of which would be likely to cause any condition to the obligations
of such party to effect the Merger and the other transactions contemplated by
this Agreement not to be satisfied and (ii) the failure of such party to comply
with any covenant or  agreement to be complied with by it pursuant to this
Agreement which would be likely to result in any condition to the obligations of
such party to effect the Merger and the other transactions contemplated by this
Agreement not to be satisfied.  No delivery of any notice pursuant to this
Section 7.10 will cure any breach of any representation or warranty of such
party contained in this Agreement or otherwise limit or affect the remedies
available hereunder to the party receiving such notice.

     Section 7.11  Assumption of Obligations to Issue Stock.
                   ---------------------------------------- 

             (a)   At the Effective Time, automatically and without any action
     on the part of the holder thereof, each outstanding Company Stock Option
     shall become an option to purchase that number of shares of Acquiror Common
     Stock (and associated Acquiror Rights) obtained by multiplying the number
     of shares of Company Common Stock issuable upon the exercise of such option
     by the Exchange Ratio at an exercise price per share equal to the per share
     exercise price of such option divided by the Exchange Ratio and otherwise
     upon the same terms and conditions as such outstanding options to purchase
     Company Common Stock; provided, however, that in the case of any option to
     which Section 421 of the Code applies by reason of the qualifications under
     Section 422 or 423 of the Code, the exercise price, the number of shares
     purchasable pursuant to such option and the terms and conditions of
     exercise of such option shall be determined in a manner that complies with
     Section 424(a) of the Code.

             (b)   On or prior to the Effective Time, the Company shall take or
     cause to be taken all such actions, reasonably satisfactory to the
     Acquiror, as may be necessary or desirable in order to authorize the
     transactions contemplated by Subsection 7.11(a) hereof. Except as provided
                                  ------------------ 
     in this Agreement or pursuant to the provisions of any Company Option Plans
     or employee or director stock option agreement as in effect on the date
     hereof, from the date 

                                       50
<PAGE>
 
     hereof the Company will not accelerate the vesting or exercisability of or
     otherwise modify the terms and conditions applicable to the Company Stock
     Options.

             (c)   The Acquiror shall take all corporate actions necessary to
     reserve for issuance a sufficient number of shares of Acquiror Common Stock
     (and associated Acquiror Rights) for delivery upon exercise of the Company
     Stock Options.

             (d)   As promptly as practicable after the Effective Time, the
     Acquiror shall file one or more Registration Statements on Form S-8 (or any
     successor or other appropriate forms) with respect to the shares of
     Acquiror Common Stock (and associated Acquiror Rights) subject to the
     Company Stock Options and shall use its reasonable efforts to maintain the
     effectiveness of such registration statement or registration statements
     (and maintain the current status of the prospectus or prospectuses
     contained therein) for so long as such options remain outstanding and to
     comply with applicable state securities and blue sky laws.

     Section 7.12  Real Estate Transfer Tax Returns.  The Company shall
                   --------------------------------                    
cooperate with the Acquiror and Newco in the preparation and filing of any Tax
Return required to be filed with any tax authority with respect to any transfer
or deemed transfer of the beneficial ownership of the Company's real property,
including supplying in a timely manner a complete list of all real property
interests held by the Company and any information with respect to such property
that is reasonably necessary to complete any such Tax Return.  The fair market
value of any such real property shall be determined by the Acquiror.

     Section 7.13  Acquiror's Board of Directors and Officers.  Acquiror shall
                   ------------------------------------------                 
take all steps necessary to cause (i) the size of the Acquiror's Board of
Directors to be expanded to a number no larger than eight and (ii) the
appointment as of the Effective Time of L.J. Sevin, Dietrich Erdmann and Alan R.
Schuele to the Board of Directors of Acquiror, or any substitute for such
persons as shall be selected prior to the Effective Time by the Company's Board
of Directors and as shall be reasonably acceptable to Acquiror, Acquiror shall
use its best efforts to cause Messrs. Sevin, Erdmann and Schuele to be nominated
to the Acquiror's Board of Directors at the Acquiror's next annual meeting and
solicit, in good faith and with reasonable diligence, proxies in support of such
nomination.  At such annual meeting Mr. Sevin shall be nominated to term of
office expiring  at the annual meeting of the Acquiror's stockholders to be held
in 1999.  Mr. Erdmann shall be nominated to term of office expiring at the
annual meeting of the Acquiror's stockholders to be held in 2000 and Mr. Schuele
shall be nominated to term of office expiring at the annual meeting of the
Acquiror's stockholders to be held in 2001.  Acquiror shall take all steps
necessary to cause the appointment as of the Effective Time of Mr. Schuele to
the office of President and Chief Operating Officer of Acquiror.

                                       51
<PAGE>
 
                                 ARTICLE VIII

                              CLOSING CONDITIONS

     Section 8.1   Conditions to Obligations of Each Party Under This
                   --------------------------------------------------
Agreement.  The respective obligations of each party to effect the Merger and
the other transactions contemplated hereby will be subject to the satisfaction
at or prior to the Effective Time of the following conditions, any or all of
which may be waived by the party entitled to the benefit thereof, in whole or in
part, to the extent permitted by applicable Law:

             (a)   Effectiveness of the Registration Statement.  The 
                   ------------------------------------------- 
     Registration Statement shall have become effective in accordance with the
     provisions of the Securities Act and no stop order suspending the
     effectiveness of the Registration Statement shall be pending before or
     threatened and no proceedings for that purpose shall be in effect by the
     Commission.

             (b)   Stockholder Approval.  This Agreement and the Merger shall 
                   -------------------- 
     have been approved and adopted by the requisite vote of the stockholders of
     the Company in accordance with the DGCL and the certificate of
     incorporation and by-laws of the Company. The issuance of shares of
     Acquiror Common Stock pursuant to this Agreement shall have been approved
     by the requisite vote of the stockholders of the Acquiror in accordance
     with the requirements of the NYSE and the articles of incorporation and
     bylaws of the Acquiror.

             (c)   No Order.  No Court or Governmental Authority having 
                   -------- 
     jurisdiction over the Company or the Acquiror shall have enacted, issued,
     promulgated, enforced or entered any Law, Regulation or Order (whether
     temporary, preliminary or permanent) which is then in effect and which has
     the effect of making the Merger illegal or otherwise prohibiting
     consummation of the Merger.

             (d)   Regulatory Approvals.  All approvals and consents of 
                   --------------------    
     applicable Courts or Governmental Authorities required to consummate the
     Merger which the failure to obtain would have a Material Adverse Effect on
     the Acquiror or the Surviving Corporation shall have been received and all
     applicable waiting periods shall have expired or been terminated.

             (e)   Stock Exchange Listing.  The shares of Acquiror Common 
                   ---------------------- 
     Stock (and the associated Acquiror Rights) to be issued pursuant to the
     Merger shall have been approved for listing, subject to official notice of
     issuance, on the NYSE.

             (f)   Pooling of Interests.  The Acquiror shall have been advised 
                   --------------------   
     in writing by Coopers & Lybrand L.L.P. as of the date upon which the
     Effective Time is to occur that such firm concurs with the management of
     Acquiror that there is no reason why the Merger cannot be treated for
     financial accounting purposes as a "pooling of interests" under GAAP. The
     Company shall have been advised in writing by Ernst & Young L.L.P. as of
     the date upon which the Effective Time is to occur that such firm concurs
     with the management of the 

                                       52
<PAGE>
 
     Company that there is no reason why the Merger cannot be treated for
     financial accounting purposes as a "pooling of interests" under GAAP.

     Section 8.2   Additional Conditions to Obligations of the Acquiror
                   ----------------------------------------------------
Companies.  The obligations of the Acquiror Companies to effect the Merger and
- ---------                                                                     
the other transactions contemplated hereby shall be subject to the satisfaction
at or prior to the Effective Time of the following additional conditions, any or
all of which may be waived by the Acquiror Companies, in whole or in part, to
the extent permitted by applicable Law:

             (a)   Representations and Warranties.  Each of the representations
                   ------------------------------ 
      and warranties of the Company contained in this Agreement to the extent it
     is qualified as to Material Adverse Effect shall be true and correct and
     each such representation and warranty to the extent that it is not so
     qualified shall be true and correct (without regard to any other
     materiality qualification) such that the aggregate effect of any
     inaccuracies in such representations and warranties will not have a
     Material Adverse Effect on the Company, in each case as of the date hereof
     and at and as of the Effective Time as if made at and as of such time,
     except that those representations and warranties which address matters only
     as of a particular date shall remain true and correct as of such date. The
     Acquiror Companies shall have received a certificate of the President and
     the Chief Financial Officer of the Company, dated the date of the Effective
     Time, to such effect.

             (b)   Agreements and Covenants.  The Company shall have performed 
                   ------------------------ 
     or complied in all respects with all agreements and covenants required by
     this Agreement to be performed or complied with by it on or prior to the
     Effective Time. The Acquiror Companies shall have received a certificate of
     the President and the Chief Financial Officer of the Company, dated the
     date of the Effective Time, to such effect.

             (c)   Tax Opinion.  The Acquiror shall have received the opinion 
                   ------------   
     of its tax counsel, Skadden, Arps, Slate, Meagher & Flom LLP, to the effect
     that the Merger will qualify as a reorganization within the meaning of
     Section 368(a) of the Code. The issuance of such opinion shall be
     conditioned on the receipt by such tax counsel of representation letters
     from each of the Acquiror, Newco and the Company, in each case, in form and
     substance reasonably satisfactory to Skadden, Arps, Slate, Meagher & Flom
     LLP. The specific provisions of each such representation letter shall be in
     form and substance reasonably satisfactory to such tax counsel, and each
     such representation letter shall be dated on or before the date of such
     opinion and shall not have been withdrawn or modified in any material
     respect.

     Section 8.3   Additional Conditions to Obligations of the Company.  The
                   ---------------------------------------------------      
obligations of the Company to effect the Merger and the other transactions
contemplated hereby shall be subject to the satisfaction at or prior to the
Effective Time of the following additional conditions, any or all of which may
be waived by the Company, in whole or in part, to the extent permitted by
applicable Law:

                                       53
<PAGE>
 
             (a)   Representations and Warranties.  Each of the representations
                   ------------------------------ 
     and warranties of the Acquiror Companies contained in this Agreement to the
     extent it is qualified as to Material Adverse Effect shall be true and
     correct and each such representation and warranty to the extent that it is
     not so qualified shall be true and correct (without regard to any other
     materiality qualification) such that the aggregate effect of any
     inaccuracies in such representations and warranties will not have a
     Material Adverse Effect on the Acquiror Companies, in each case as of the
     date hereof and at and as of the Effective Time as if made at and as of
     such time, except that those representations and warranties which address
     matters only as of a particular date shall remain true and correct as of
     such date. The Company shall have received a certificate of the President
     and the Chief Financial Officer of each of the Acquiror Companies, dated
     the date of the Effective Time, to such effect.

             (b)   Agreements and Covenants.  The Acquiror Companies shall have
                   ------------------------  
     performed or complied in all respects with all agreements and covenants
     required by this Agreement to be performed or complied with by them on or
     prior to the Effective Time.  The Company shall have received a certificate
     of the President and the Chief Financial Officer of each of the Acquiror
     Companies, dated the date of the Effective Time, to such effect.

             (c)   Tax Opinion.  The Company shall have received the opinion of 
                   ----------- 
     its tax counsel, Winstead Sechrest & Minick P.C., to the effect that the
     Merger will qualify as a reorganization within the meaning of Section
     368(a) of the Code. The issuance of such opinion shall be conditioned on
     the receipt by such tax counsel of representation letters from each of the
     Acquiror, Newco and the Company, in each case, in form and substance
     reasonably satisfactory to Winstead Sechrest & Minick P.C. The specific
     provisions of each such representation letter shall be in form and
     substance reasonably satisfactory to such tax counsel, and each such
     representation letter shall be dated on or before the date of such opinion
     and shall not have been withdrawn or modified in any material respect.

                                  ARTICLE IX

                       TERMINATION, AMENDMENT AND WAIVER

     Section 9.1   Termination.  This Agreement may be terminated at any time
                   -----------                                               
prior to the Effective Time, whether before or after approval of this Agreement
and the Merger by the stockholders of the Company:

             (a)   by mutual consent of the Acquiror and the Company;

             (b)   by the Acquiror, upon a breach of any covenant or agreement
     on the part of the Company set forth in this Agreement, or if any
     representation or warranty of the Company shall have become untrue, in
     either case such that the conditions set forth in Subsection 8.2(a) or
                                                       -----------------
     Subsection 8.2(b) would not be satisfied (a "Terminating Company Breach");
     -----------------                            -------------------------- 
     provided that, if such Terminating Company Breach is curable by the Company
     through the exercise of reasonable efforts, provided the Company continues
     to exercise such

                                       54
<PAGE>
 
     reasonable efforts, the Acquiror may not terminate this Agreement under
     this Subsection 9.1(b) unless such Terminating Company Breach is not cured
          -----------------                                              
     within 20 days after written notice of such breach is given by the Acquiror
     to the Company;

             (c)   by the Company, upon breach of any covenant or agreement on
     the part of the Acquiror Companies set forth in this Agreement, or if any
     representation or warranty of the Acquiror Companies shall have become
     untrue, in either case such that the conditions set forth in Subsection
                                                                  ----------
     8.3(a) or Subsection 8.3(b) would not be satisfied (a "Terminating Acquiror
     ------    -----------------                            --------------------
     Breach"); provided that, if such Terminating Acquiror Breach is curable by
     ------                                                                    
     the Acquiror Companies through the exercise of their reasonable efforts,
     provided the Acquiror Companies continue to exercise such reasonable
     efforts, the Company may not terminate this Agreement under this Subsection
                                                                      ----------
     9.1(c) unless such Terminating Acquiror Breach is not cured within 20 days
     ------                                                                    
     after written notice of such breach is given by the Company to the
     Acquiror;

             (d)   by either Acquiror or the Company, if there shall be any
     Order which is final and nonappealable permanently enjoining, restraining
     or prohibiting the consummation of the Merger, unless the party relying on
     such Order has not complied with its obligations under Section 7.3 hereof;
                                                            -----------        

             (e)   by either Acquiror or the Company, if the Merger shall not
     have been consummated before October 31, 1998; unless the party seeking to
     terminate this Agreement has not complied with its obligations under
     Section 7.3 hereof, provided, however, that the right to terminate this
     -----------          --------  -------                                  
     Agreement under this Subsection 9.1(e) shall not be available to any party
                          -----------------                                    
     whose failure to fulfill any obligation under this Agreement has been the
     cause of, or resulted in, the failure of the Effective Time to occur on or
     before the Termination Date;

             (f)   by either Acquiror or the Company, if this Agreement shall
     fail to receive the requisite vote for approval and adoption by the
     stockholders of the Company at the Company Stockholders' Meeting;

             (g)   by either Acquiror or the Company if the issuance of Acquiror
     Common Stock pursuant to this Agreement shall fail to receive the requisite
     vote for approval by the stockholders of Acquiror at the Acquiror's
     Stockholders' Meeting;

             (h)   by the Company, if the Pre-Closing Average Price is less than
     $12.00 per share;

             (i)   by the Acquiror, if the Board of Directors of the Company (i)
     fails to recommend approval and adoption of this Agreement and the Merger
     by the stockholders of the Company or withdraws or modifies (or publicly
     announces an intention to withdraw or modify) in any adverse manner its
     approval or recommendation of this Agreement or the Merger; (ii) makes any
     recommendation with respect to any Acquisition Proposal other than a
     recommendation to reject such Acquisition Proposal; (iii) takes any action
     prohibited by 

                                       55
<PAGE>
 
     Section 6.3, or which would be prohibited by Section 6.3 but for the second
     -----------                                  -----------    
     sentence thereof; (iv) enters into any agreement relating to an Acquisition
     Proposal other than this Agreement or the Option Agreement; or (v) resolves
     to do any of the foregoing; and

             (j)   by the Company, if the Board of Directors of the Acquiror
     fails to recommend approval of the issuance of shares of Acquiror Common
     Stock pursuant to this Agreement by the stockholders of the Acquiror or
     withdraws or modifies (or publicly announces an intention to withdraw or
     modify) its approval and recommendation in a manner materially adverse to
     the Company or shall have resolved to do any of the foregoing;

     The right of any party hereto to terminate this Agreement pursuant to this
Section 9.1 hereof will remain operative and in full force and effect regardless
- -----------                                                                     
of any investigation made by or on behalf of any party hereto, any Person
controlling any such party or any of their respective officers, directors,
representatives or agents, whether prior to or after the execution of this
Agreement.

      Section 9.2. Effect of Termination.
                   --------------------- 

             (a)   In the event of the termination of this Agreement pursuant to
     Section 9.1, this Agreement will forthwith become void, and there will be
     -----------                                                              
     no liability on the part of the Acquiror Companies or the Company or any of
     their respective officers or directors to the other and all rights and
     obligations of any party hereto will cease, except (i) as set forth in this
     Section 9.2 and in Section 10.1 hereof and (ii)  nothing herein will
     -----------        ------------                                     
     relieve any party from liability for any breach of this Agreement.

             (b)   If this Agreement is terminated (i) by the Acquiror pursuant
     to clause (i) of Subsection 9.1(i) hereof (except under circumstances which
                      -----------------
     would permit the Company to terminate this Agreement under Subsection
                                                                ----------
     9.1(h)); (ii) by the Acquiror pursuant to Subsection 9.1(i) hereof under
     ------                                    -----------------             
     any circumstances other than those described in clause (i) of this
     Subsection 9.2(b); (iii) by Acquiror or Company pursuant to Subsection
     -----------------                                           ----------
     9.1(f) hereof because of the failure to obtain the required approval from
     ------                                                                   
     the Company stockholders and at the time of such termination or prior to
     the Company Stockholders' Meeting there shall have been an Acquisition
     Proposal (whether or not such offer, proposal, announcement or agreement
     shall have been rejected or shall have been withdrawn prior to the time of
     such termination or of the Company Stockholders' Meeting); or (iv) by
     Acquiror as a result of Company's material breach of Section 7.3 or
                                                          -----------   
     Subsection 7.1(a) hereof, the Company shall promptly pay to Acquiror or the
     -----------------                                                          
     Company by wire transfer of same day funds not later than two Business Days
     after the date of such termination a termination fee of $4,528,000 (the
     "Termination Fee") provided, however, that if this Agreement is terminated
     by Acquiror or the Company pursuant to Subsection 9.1(f) hereof under the
                                            -----------------                 
     circumstances described in Subsection 9.2(b)(ii) hereof, and at the time of
     such termination the stockholders of the Acquiror shall have failed to
     approve the issuance of Acquiror Common Stock pursuant to this Agreement,
     the Acquiror shall not be entitled to the Termination Fee.

                                       56
<PAGE>
 
             (c)   If  this Agreement is terminated by the Company pursuant to
     Subsection 9.1(i) hereof, and at the time of such termination there shall
     -----------------                                                        
     have been an Acquiror Acquisition Proposal (whether or not such offer,
     proposal, announcement or agreement shall have been rejected or shall have
     been withdrawn prior to the time of such termination), and the stockholders
     of Acquiror shall have failed to approve the issuance of Acquiror Common
     Stock pursuant this Agreement, the Acquiror shall promptly pay to the
     Company by wire transfer of same day funds not later than two Business Days
     after the date of such termination a termination fee of $2,000,000.

     Section 9.3   Amendment.  Subject to the requirements of Law, this
                   ---------                                           
Agreement may be amended by the parties hereto by action taken by or on behalf
of their respective Boards of Directors at any time prior to the Effective Time;
provided, however, that, after approval of the Merger by the stockholders of the
Company, no amendment may be made which would reduce the amount or change the
type of consideration into which each share of Company Common Stock will be
converted pursuant to this Agreement upon consummation of the Merger.  This
Agreement may not be amended except by an instrument in writing signed by the
parties hereto.

     Section 9.4   Waiver.  At any time prior to the Effective Time, any party
                   ------                                                     
hereto may (a) extend the time for the performance of any of the obligations or
other acts of the other party hereto, (b) waive any inaccuracies in the
representations and warranties of the other party contained herein or in any
document delivered pursuant hereto and (c) waive compliance by the other party
with any of the agreements or conditions contained herein.  Any such extension
or waiver will be valid only if set forth in an instrument in writing signed by
the party or parties to be bound thereby. For purposes of this Section 9.4, the
                                                               -----------     
Acquiror Companies will be deemed to be one party.

     Section 9.5   Expenses.  All Expenses incurred by the parties hereto will
                   --------                                                   
be borne solely and entirely by the party which has incurred such Expenses;
provided, however, that the allocable share of the Acquiror Companies as a group
and the Company for all Expenses related to printing, filing and mailing the
Registration Statement and the Proxy Statement and all Commission and other
regulatory filing fees incurred in connection with the Registration Statement
and  the Proxy Statement will be one-half each; and provided, further, that the
Acquiror may, at its option, pay any Expenses of the Company that are solely and
directly related to the Merger.
 
                                   ARTICLE X

                              GENERAL PROVISIONS

     Section 10.1  Effectiveness of Representations, Warranties and Agreements.
                   ----------------------------------------------------------- 

             (a)   Except as set forth in Subsection 10.1(b) of this Agreement,
                                          ------------------
     the representations, warranties and agreements of each party hereto will
     remain operative and in full force and effect regardless of any
     investigation made by or on behalf of any other party hereto, any Person
     controlling any such party or any of their officers, directors,
     representatives or agents whether prior to or after the execution of this
     Agreement.

                                       57
<PAGE>
 
             (b)   The representations, warranties and agreements in this
     Agreement will terminate at the Effective Time or upon the termination of
     this Agreement pursuant to Article IX hereof, except that the agreements
                                ----------
     set forth in Articles II and III and Sections 7.7, 7.8, 7.11 and 7.13
                  -----------     ---     ------------  ---  ----     ----
     hereof will survive the Effective Time and those set forth in Sections 7.5
                                                                   -------- ---
     and 9.2 and Article X hereof will survive termination.
         ---     ---------                                 

     Section 10.2  Notices.  All notices and other communications given or made
                   -------                                                     
pursuant hereto will be in writing and will be deemed to have been duly given
upon receipt, if delivered personally, mailed by registered or certified mail
(postage prepaid, return receipt requested) to the parties at the following
addresses or sent by electronic transmission to the telecopier number specified
below:

             (a)   If to any of the Acquiror Companies, to:

                   Unitrode Corporation
                   7 Continental Boulevard
                   Merrimack, New Hampshire 03054-4334
                   Attention: Allan R. Campbell, Esq.
                   Telecopier No.: (603) 429-8771

             with a copy to:

                   Skadden, Arps, Slate, Meagher & Flom LLP
                   One Beacon Street
                   Boston, Massachusetts  02108
                   Attention: Margaret A. Brown, Esq.
                   Telecopier No.: (617) 573-4822

             (b)   If to the Company, to:
  
                   BENCHMARQ Microelectronics, Inc.
                   17919 Waterview Parkway
                   Dallas, Texas 75252
                   Attention: Alan R. Schuele
                   Telecopier No.: (972) 437-9198

             with a copy to:

                   Winstead Sechrest & Minick P.C
                   5400 Renaissance Tower
                   1201 Elm Street
                   Dallas, Texas  75270
                   Attention:  Robert E. Crawford, Jr., Esq.
                   Telecopier No.:  (214) 745-5390

                                       58
<PAGE>
 
             and

                   Brobeck Phleger & Harrison LLP
                   Spear Street Tower 26/th/ Floor
                   One Market
                   San Francisco, CA  94105
                   Attention:  Steve L. Camahort, Esq.
                   Telecopier No.:  (415) 442-1010

or to such other address or telecopier number as any party may, from time to
time, designate in a written notice given in a like manner.  Notice given by
telecopier will be deemed delivered on the day the sender receives telecopier
confirmation that such notice was received at the telecopier number of the
addressee.  Notice given by mail as set out above will be deemed delivered three
days after the date the same is postmarked.
 
     Section 10.3  Headings.  The headings contained in this Agreement are for
                   --------                                                   
reference purposes only and will not affect in any way the meaning or
interpretation of this Agreement.

     Section 10.4  Severability.  If any term or other provision of this
                   ------------                                         
Agreement is invalid, illegal or incapable of being enforced by any rule of law
or public policy, all other conditions and provisions of this Agreement will
nevertheless remain in full force and effect so long as the economic or legal
substance of the transactions contemplated hereby is not affected in any manner
materially adverse to any party.  Upon such determination that any term or other
provision is invalid, illegal or incapable of being enforced, the parties hereto
will negotiate in good faith to modify this Agreement so as to effect the
original intent of the parties as closely as possible in an acceptable manner to
the end that transactions contemplated hereby are fulfilled to the extent
possible.

     Section 10.5  Entire Agreement.  This Agreement (together with the Voting
                   ----------------                                           
Agreement and Option Agreement) constitutes the entire agreement of the parties,
and supersedes all prior agreements and undertakings (other than that certain
Mutual Confidentiality Agreement, dated as of February 5, 1998, executed by the
Acquiror and the Company), both written and oral, among the parties, with
respect to the subject matter hereof.

     Section 10.6  Assignment.  This Agreement may not be assigned by operation
                   ----------                                                  
of Law or otherwise without the prior written consent of each of the parties
hereto.

     Section 10.7  Parties in Interest.  This Agreement will be binding upon
                   -------------------                                      
and inure solely to the benefit of each party hereto, and, other than pursuant
to Section 7.7, 7.8, 7.11 and 7.13 hereof, nothing in this Agreement, express or
   -------------------------------                                              
implied, is intended to or will confer upon any other Person any right, benefit
or remedy of any nature whatsoever under or by reason of this Agreement.

                                       59
<PAGE>
 
     Section 10.8  Failure or Indulgence Not Waiver;  Remedies Cumulative.  No
                   ------------------------------------------------------     
failure or delay on the part of any party hereto in the exercise of any right
hereunder will impair such right or be construed to be a waiver of, or
acquiescence in, any breach of any representation, warranty or agreement herein,
nor will any single or partial exercise of any such right preclude other or
further exercise thereof or of any other right.  All rights and remedies
existing under this Agreement are cumulative to, and not exclusive to, and not
exclusive of, any rights or remedies otherwise available.

     Section 10.9  Governing Law.  THIS AGREEMENT AND THE AGREEMENTS,
                   -------------                                     
INSTRUMENTS AND DOCUMENTS CONTEMPLATED HEREBY WILL BE GOVERNED BY AND CONSTRUED
IN ACCORDANCE WITH THE LAWS OF THE STATE OF DELAWARE (EXCLUSIVE OF CONFLICTS OF
LAW PRINCIPLES). COURTS WITHIN THE STATE OF DELAWARE WILL HAVE JURISDICTION OVER
ANY AND ALL DISPUTES BETWEEN THE PARTIES HERETO, WHETHER IN LAW OR EQUITY,
ARISING OUT OF OR RELATING TO THIS AGREEMENT AND THE AGREEMENTS, INSTRUMENTS AND
DOCUMENTS CONTEMPLATED HEREBY. THE PARTIES CONSENT TO AND AGREE TO SUBMIT TO THE
JURISDICTION OF SUCH COURTS. EACH OF THE PARTIES HEREBY WAIVES, AND AGREES NOT
TO ASSERT IN ANY SUCH DISPUTE, TO THE FULLEST EXTENT PERMITTED BY APPLICABLE
LAW, ANY CLAIM THAT (I) SUCH PARTY IS NOT PERSONALLY SUBJECT TO THE JURISDICTION
OF SUCH COURTS, (II) SUCH PARTY AND SUCH PARTY'S PROPERTY IS IMMUNE FROM ANY
LEGAL PROCESS ISSUED BY SUCH COURTS OR (III) ANY LITIGATION COMMENCED IN SUCH
COURTS IS BROUGHT IN AN INCONVENIENT FORUM.

     Section 10.10 Counterparts.  This Agreement may be executed in multiple
                   ------------                                             
counterparts, and by the different parties hereto in separate counterparts, each
of which when executed will be deemed to be an original but all of which taken
together will constitute one and the same agreement.

                                       60
<PAGE>
 
     IN WITNESS WHEREOF, each of the parties hereto has caused this Agreement to
be executed as of the date first written above by their respective officers
thereunto duly authorized.

                                        UNITRODE CORPORATION



                                        By:/s/ ROBERT J. RICHARDSON
                                           -------------------------------------
                                            Name:  Robert J. Richardson
                                            Title: President and Chief
                                                   Executive Officer


                                        MERRIMACK CORPORATION



                                        By:/s/ ROBERT J. RICHARDSON
                                           -------------------------------------
                                            Name:  Robert J. Richardson 
                                            Title: President


                                        BENCHMARQ MICROELECTRONICS, INC.



                                        By:/s/ ALAN R. SCHUELE
                                           -------------------------------------
                                            Name:  Alan R. Schuele
                                            Title: President and Chief
                                                   Executive Officer

                                       61
<PAGE>
                                                                        ANNEX A 

                                VOTING AGREEMENT

     VOTING AGREEMENT, dated as of March 2, 1998 (this "Voting Agreement") by
                                                        ----------------     
and among Alan R. Schuele, Derrell C. Coker, L.J. Sevin, Harvey B. Cash,
Dietrich Erdmann, Jack Kilby and Charles H. Phipps (the "Stockholders"), and
                                                         ------------       
Unitrode Corporation, a Maryland corporation ("Acquiror").
                                               --------   

     WHEREAS, BENCHMARQ Microelectronics, Inc., a Delaware corporation, Acquiror
and Merrimack Corporation, a Delaware corporation and a wholly owned subsidiary
of Acquiror ("Newco"), have contemporaneously with the execution of this Voting
              -----                                                            
Agreement, entered into an Agreement and Plan of Merger dated March 2, 1998 (the
"Merger Agreement") which provides, among other things, that Newco shall be
 ----------------                                                          
merged (the "Merger")with and into the Company pursuant to the terms and
             ------                                                     
conditions thereof;

     WHEREAS, as an essential condition and inducement to Acquiror to enter into
the Merger Agreement and in consideration therefor, the undersigned Stockholders
have agreed to enter into this Voting Agreement; and

     WHEREAS, as of the date hereof, the Stockholders own of record and
beneficially the shares of common stock, par value $.001 per share, of the
Company (the "Company Common Stock") set forth opposite their respective names
              --------------------                                            
on Schedule A hereto and wish to enter into this Agreement with respect to such
shares of Company Common Stock and the options to purchase shares of Company
Common Stock ("Options");
               -------   

     NOW, THEREFORE, in consideration of the foregoing and the mutual covenants
and agreements contained herein and in the Merger Agreement, and intending to be
legally bound hereby, the parties hereto hereby agree as follows:

                                   ARTICLE I

                                Voting of Shares

     Section 1.1    Voting Agreement.  Each Stockholder hereby agrees to:  (a)
appear, or cause the holder of record on the applicable record date (the "Record
                                                                          ------
Holder") to appear for the purpose of obtaining a quorum at any annual or
- ------                                                                   
special meeting of stockholders of the Company and at any adjournment thereof;
(b) vote, or cause the Record Holder to vote, in person or by proxy, at every
meeting of the stockholders of the Company at which such matters are considered
and at every adjournment thereof, all of the shares of the Company Common Stock
owned or with respect to which such Stockholder has or shares voting power or
control and all of the shares of Company Common Stock which shall, or with
respect to which voting power or control shall, hereafter be acquired by such
Stockholder (collectively, the "Shares") in favor the Merger, the Merger
                                ------                                  
Agreement and the transactions contemplated by the Merger Agreement; and (c)
vote, or cause the Record Holder to vote, in person or by proxy, at every
meeting of the stockholders of the Company at which such matters are considered
and at every adjournment thereof, such Stockholder's Shares against any
<PAGE>
 
action, proposal or agreement that could reasonably be expected to result,
directly or indirectly, in a breach in any material respect of any covenant,
representation or warranty or any other obligation of the Company under the
Merger Agreement or the Stock Option Agreement dated March 2, 1998 between the
Company and Acquiror (the "Option Agreement"), or which could reasonably be
                           ----------------
expected to result in any of the conditions to the Company's obligations under
the Merger Agreement or the Option Agreement not being fulfilled.

     Section 1.2    No Ownership Interest.  Nothing contained in this Voting
Agreement shall be deemed to vest in Acquiror any direct or indirect ownership
or incidence of ownership of or with respect to any Shares.  All rights,
ownership, and economic benefits of and relating to the Shares or Options shall
remain and belong to the Stockholders, and Acquiror shall have no authority to
manage, direct, superintend, restrict, regulate, govern, or administer any of
the policies or operations of the Company or exercise any power or authority to
direct the Stockholders in the voting of any of the Shares, except as otherwise
provided herein, or the performance of the Stockholders' duties or
responsibilities as stockholders of the Company.

     Section 1.3    Evaluation of Investment.  Each Stockholder, by reason of
its knowledge and experience in financial and business matters, believes itself
capable of evaluating the merits and risks of the investment in shares of common
stock, par value $.01 per share, of Acquiror ("Acquiror Common Stock"),
                                               ---------------------   
contemplated by the Merger Agreement.

     Section 1.4    Documents Delivered.  Each Stockholder acknowledges receipt
of copies of the following documents:

          (a) the Merger Agreement and all Annexes thereto;

          (b) the Option Agreement;

          (c) Acquiror's 1996 Annual Report (including Annual Report on
              Form 10-K for the year ended January 31, 1996);

          (d) Acquiror's Proxy Statement dated for the stockholders meeting
              dated June 2, 1997; and

          (e) Acquiror's Quarterly Report for the quarter ended November 1, 1997
              (including Report on Form 10-Q).

     Section 1.5    No Inconsistent Agreements. Each Stockholder hereby
covenants and agrees that, except as contemplated by this Voting Agreement and
the Merger Agreement, the Stockholder (a) has not entered, and shall not enter
at any time while this Voting Agreement remains in effect into any voting
agreement and (b) has not granted, and shall not grant at any time while this
Voting Agreement remains in effect, a proxy or power of attorney, in either case
which is inconsistent with this Agreement.
<PAGE>
 
                                  ARTICLE II

                            Restrictions on Transfer

     Section 2.1    Transfer of Title.

          (a) Each Stockholder hereby covenants and agrees that such Stockholder
will not, prior to the termination of this Voting Agreement, either directly or
indirectly, offer or otherwise agree to sell, assign, pledge, hypothecate,
transfer, exchange, or dispose of any Shares or Options or any other securities
or rights convertible into or exchangeable for shares of Company Common Stock,
owned either directly or indirectly by such Stockholder or with respect to which
such Stockholder has the power of disposition, whether now or hereafter
acquired, without the prior written consent of Acquiror (provided nothing
contained herein will be deemed to restrict the exercise of Options).

          (b) Each Stockholder hereby agrees and consents to the entry of stop
transfer instructions with the Company against the transfer of any Shares
consistent with the terms of Section 2.1(a) hereof.
                             --------------        


                                  ARTICLE III

                         Representations and Warranties
                              of the Stockholders

     Each Stockholder hereby severally represents and warrants to Acquiror as
follows:

     Section 3.1    Authority Relative to This Agreement.  Such Stockholder is
competent to execute and deliver this Voting Agreement, to perform it
obligations hereunder and to consummate the transactions contemplated hereby.
This Voting Agreement has been duly and validly executed and delivered by such
Stockholder and, assuming the due authorization, execution and delivery by
Acquiror, constitutes a legal, valid and binding obligation of such Stockholder,
enforceable against such Stockholder in accordance with its terms except that
(i) the enforceability thereof may be subject to applicable bankruptcy,
insolvency or other similar laws, now or hereinafter in effect affecting
creditors' rights generally and (ii) the availability of the remedy of specific
performance or injunctive or other forms of equitable relief may be subject to
equitable defenses and would be subject to the discretion of the court before
which any proceeding therefor may be brought.

     Section 3.2    No Conflict.  The execution and delivery of this Voting
Agreement by such Stockholder does not, and the performance of this Voting
Agreement by such Stockholder shall not result in any breach of or constitute a
default (or an event that with notice or lapse of time or both would become a
default) under, or give to others any rights of termination, amendment,
acceleration or cancellation of, or result in the creation of a lien or
encumbrance, on any of the Shares or Options pursuant to, any note, bond,
mortgage, indenture, contract, agreement, lease, license, permit, franchise or
other instrument or obligation to which such Stockholder is a party or by which
such Stockholder or the Shares or Options are bound or affected.
<PAGE>
 
     Section 3.3    Title to the Shares.  The Shares and Options held by such
Stockholder are owned free and clear of all security interests, liens, claims,
pledges, options, rights of first refusal, agreements, limitations on such
Stockholder's voting rights, charges and other encumbrances of any nature
whatsoever and such Stockholder has not appointed or granted any proxy, which
appointment or grant is still effective, with respect to the Shares.


                                  ARTICLE IV

                                 Miscellaneous

     Section 4.1    Termination.  This Agreement shall terminate upon the
earliest to occur of (a) the termination of the Merger Agreement in accordance
with its terms or (b) the Effective Time (as defined in the Merger Agreement).
Upon such termination, no party shall have any further obligations or
liabilities hereunder, provided that no such termination shall relieve any party
from liability for any breach of this Agreement prior to such termination.

     Section 4.2    Enforcement of Agreement.  The parties hereto agree that
irreparable damage would occur in the event that any of the provisions of this
Voting Agreement were not performance in accordance with its specified terms or
were otherwise breached.  It is accordingly agreed that the parties shall be
entitled to an injunction or injunctions to prevent breaches of this Voting
Agreement and to specific performance of the terms and provisions hereof in
addition to any other remedy to which they are entitled at law or in equity.

     Section 4.3    Successors and Affiliates.  This Voting Agreement shall
inure to the benefit of and shall be binding upon the parties hereto and their
respective heirs, legal representatives and assigns.  If any Stockholder shall
at any time hereafter acquire ownership of, or voting power with respect to, any
additional Shares in any manner, whether by the exercise of any Options or any
securities or rights convertible into or exchangeable for shares of Company
Common Stock, operation of law or otherwise, such Shares shall be held subject
to all of the terms and provisions of this Voting Agreement.  Without limiting
the foregoing, each Stockholder specifically agrees that the obligations of such
Stockholder hereunder shall not be terminated by operation of law, whether by
death or incapacity of the Stockholder or otherwise.

     Section 4.4    Entire Agreement.  This Voting Agreement constitutes the
entire agreement among Acquiror and the Stockholders with respect to the subject
matter hereof and supersedes all prior agreements and understandings, both
written and oral, among Acquiror and the Stockholders with respect to the
subject matter hereof.

     Section 4.5    Captions and Counterparts.  The captions in this Voting
Agreement are for convenience only and shall not be considered a part of or
affect the construction of interpretation of any provision of this Voting
Agreement.  This Voting Agreement may be executed in several counterparts, each
of  which shall constitute one in the same instrument.

     Section 4.6    Amendment.  This Voting Agreement may not be amended except
by an instrument in writing signed by the parties hereto.
<PAGE>
 
     Section 4.7    Waivers.  Except as provided in this Voting Agreement, no
action taken pursuant to this Voting Agreement, including without limitation any
investigation by or on behalf of any party, shall be deemed to constitute a
waiver by the party taking such action of compliance with any representations,
warranties, covenants or agreements contained in this Voting Agreement. The
wavier by any party hereto of a breach of any provision hereunder shall not
operate or be construed as a wavier of any prior or subsequent breach of the
same or any other provision hereunder.

     Section 4.8    Severability.  If any term of other provision of this Voting
Agreement is invalid, illegal or incapable of being enforced by any rule of law,
or public policy, all other conditions and provisions of this Voting Agreement
shall nevertheless remain in full force and effect. Upon such determination that
any term or other provision is invalid, illegal or incapable of being enforced,
the parties hereto shall negotiate in good faith to modify this Voting Agreement
so as to effect the original intent of the parties as closely as possible to the
fullest extent permitted by applicable law in a mutually acceptable manner in
order that the terms of this Voting Agreement remain as originally contemplated
to the fullest extent possible.

     Section 4.9    Notices.  All notices and other communications given or made
pursuant hereto shall be in writing and shall be deemed to have been duly given
or made and shall be effective upon receipt, if delivered personally, mailed by
registered or certified mail (postage prepaid, return receipt requested) to the
parties at the following addresses (or at such other address for a party as
shall be specified by like changes of address) or sent by electronic
transmission (provided that a confirmation copy is sent by another approved
means) to the telecopier number specified below:

     If to a Stockholder:

               c/o Benchmarq Microelectronics, Inc.
               17919 Waterview Parkway
               Dallas, Texas  75252
               Fax:  (972) 437-9198

     If to Acquiror:

               Unitrode Corporation
               7 Continental Boulevard
               Merrimack, New Hampshire  03054
               Attention:  Allan R. Campbell
               Fax: (603) 429-8771

     with a copy to:

               Margaret A. Brown, Esq.
               Skadden, Arps, Slate, Meagher & Flom LLP
               One Beacon Street
               31/st/ Floor
               Boston, Massachusetts  02108
               Telephone:  (617) 573-4800
               Fax:  (617) 573-4822
<PAGE>
 
     Section 4.10   Governing Law.  This Voting Agreement shall be governed by,
and construed in accordance with, the laws of the State of Delaware regardless
of the laws that might otherwise govern under applicable principles of conflicts
of law.

     Section 4.11   Definitions.  Capitalized terms used and not defined herein
shall have the meaning set forth in the Merger Agreement.

     Section 4.12   Obligations of Stockholders.  The obligations of the
Stockholders hereunder shall be "several" and not (i) "joint" or (ii) "joint and
several."  Without limiting the generality of the foregoing, under no
circumstances will any Stockholder have any liability or obligation with respect
to any misrepresentation or breach of covenant of any other Stockholder.

     Section 4.13   Officers and Directors.  No person who is or becomes (during
the term hereof) a director or officer of the Company makes any agreement or
understanding herein in his or her capacity as such director or officer, and
nothing herein will limit or affect any actions taken by any Stockholder in his
or her capacity as an officer or director of the Company in exercising its
rights under the Merger Agreement.
<PAGE>
 
     IN WITNESS WHEREOF, each of the parties hereto have caused this Voting
Agreement to be duly executed as of the date first written above.

 

                              By:
                                 --------------------------------------
                                    Name:  Alan R. Schuele
 

 
                              By:
                                 --------------------------------------
                                    Name:  Derrell C. Coker
 
 

                              By:
                                 --------------------------------------
                                    Name:  L.J. Sevin


 
                              By:
                                 --------------------------------------
                                    Name:  Harvey B. Cash
 
 

                              By:
                                 --------------------------------------
                                    Name:  Dietrich Erdmann

 

                              By:
                                 --------------------------------------
                                    Name:  Jack Kilby
 
 

                              By:
                                 --------------------------------------
                                    Name:  Charles H. Phipps


                              UNITRODE CORPORATION
 
 

                              By:
                                 --------------------------------------
                                    Name:
                                    Title:
<PAGE>
 
                               VOTING AGREEMENT
                                  SCHEDULE A

                                          Number of Shares of Company Common
Stockholder:                                  Stock Owned by Stockholder:
- ------------                                  ---------------------------

L.J. Sevin                                           695,120
Jack Kilby                                             6,250
Derrell C. Coker                                      72,755
Dietrich Erdmann                                     602,212
Harvey B. Cash                                        43,850
Charles H. Phipps                                     40,422
Alan R. Schuele                                            0
<PAGE>
                                                                        ANNEX B 

                             STOCK OPTION AGREEMENT

          STOCK OPTION AGREEMENT (this "Agreement"), dated as of March 2, 1998,
                                        ---------                              
between Unitrode Corporation, a Maryland corporation ("Grantee"), and BENCHMARQ
                                                       -------                 
Microelectronics, Inc., a Delaware corporation (the "Company").
                                                     -------   

          WHEREAS, the Company, Grantee and Merrimack Corporation, a Delaware
corporation and a wholly owned subsidiary of Grantee ("Newco"), have
                                                       -----        
contemporaneously with the execution of this Agreement, entered into an
Agreement and Plan of Merger dated March 2, 1998 (the "Merger Agreement")  which
                                                       ----------------         
provides, among other things, that Newco shall be merged with and into the
Company pursuant to the terms and conditions thereof; and

          WHEREAS, as an essential condition and inducement to Grantee's
entering into the Merger Agreement and in consideration therefor, the Company
has agreed to grant Grantee the Option (as hereinafter defined);

          NOW, THEREFORE, in consideration of the foregoing and the mutual
covenants and agreements contained herein and in the Merger Agreement, and
intending to be legally bound hereby, the parties hereby agree as follows:

 
          1.   GRANT OF OPTION.  The Company hereby grants to Grantee an
unconditional, irrevocable option (the "Option") to purchase, subject to the
                                        ------                              
terms hereof, 955,158 shares (such shares being referred to herein as the
                                                                         
"Option Shares") of fully paid and nonassessable common stock, par value $.001
 -------------                                                                
per share, of the Company ("Company Common Stock"), equal to approximately ten
                            --------------------                              
percent (10%) of the number of shares of Company Common Stock issued and
outstanding (on a fully diluted basis after giving effect to the exercise of the
Option) as of the date hereof at a purchase price of $17.53 per share of Company
Common Stock, as adjusted in accordance with the provisions of Section 8 (such
                                                               ---------      
price, as adjusted if applicable, the "Option Price").
                                       ------------   

          2.   (a)  EXERCISE OF OPTION.  Grantee may exercise the Option, in
whole or part, and from time to time, if, but only if, a Triggering Event (as
hereinafter defined) shall have occurred prior to the occurrence of an Option
Termination Event (as hereinafter defined), provided that Grantee shall have
sent the written notice of such exercise (as provided in Subsection 2(e) on or
                                                         ---------------      
prior to the last date of the one (1) year period following such Triggering
Event (the "Option Expiration Date").
            ----------------------   

               (b) OPTION TERMINATION EVENTS.  The term "Option Termination
                                                         ------------------
Event" shall mean any of the following events:
- -----

                                      1-
<PAGE>
 
               (i)   the Effective Time (as defined in the Merger Agreement); or

               (ii)  termination of the Merger Agreement (A) by either party
          pursuant to Subsection 9.1(d) of the Merger Agreement, provided that
                      -----------------
          the matter giving rise to the Order (as defined in the Merger
          Agreement) providing the basis for termination under Subsection 9.1(d)
                                                               -----------------
          of the Merger Agreement shall not have been initiated by the Company
          or any Person who initiates an Acquisition Proposal (as such item is
          defined in the Merger Agreement), (B) by the Company pursuant to
          Subsection 9.1(c), Subsection 9.1(h) or Subsection 9.1(j) of the
          -----------------  -----------------    -----------------     
          Merger Agreement, (C) by either the Company or the Grantee pursuant to
          Subsection 9.1(g) of the Merger Agreement, (D) by both parties
          -----------------
          pursuant to Subsection 9.1(a) of the Merger Agreement, (E) by the
                      -----------------
          Company or the Grantee pursuant to Subsection 9.1(e) of the Merger
                                             -----------------
          Agreement (if there then exists circumstances that would permit
          termination of the Merger Agreement by the Company pursuant to
          Subsection 9.1(e) of the Merger Agreement), (F) by the Acquiror
          -----------------
          pursuant to Subsection 9.1(i)(i) (if circumstances exist that would
                      --------------------
          allow the Company to terminate the Merger Agreement pursuant to
          Subsection 9.1(h) of the Merger Agreement) or (G) by either party
          -----------------
          pursuant to any other provision of the Merger Agreement; provided (in
          the case of this Subsection 2(b)(ii)(G)) such termination occurs prior
                           ----------------------
          to the occurrence of an Acquisition Proposal.

          (c) TRIGGERING EVENTS.  The term "Triggering Event" shall mean the
                                            ----------------                
occurrence (after the date hereof) of any of the following events:

               (i)   any Person (other than the Grantee or any Subsidiary of the
          Grantee) shall have commenced (as such term is defined in Rule 14d-2
          under the Exchange Act) or shall have filed a registration statement
          under the Securities Act with respect to a tender offer or exchange
          offer to purchase any shares of Company Common Stock such that, upon
          consummation of such offer, such Person would own or control 10% or
          more of the then outstanding Company Common Stock;

               (ii)  the Company or any Subsidiary of the Company shall have
          authorized, recommended, proposed or publicly announced an intention
          to authorize, recommend or propose, or entered into, an agreement with
          any Person (other than the Grantee or any Subsidiary of the Grantee)
          to (A) effect a merger, reorganization, consolidation, share exchange
          or other business combination or similar transaction involving the
          Company or any of its Significant Subsidiaries, (B) sell, lease or
          otherwise dispose of assets of the Company or its Subsidiaries
          representing 10% or more of the consolidated assets of the Company
          other than in the ordinary course of business or (C) issue, sell or
          otherwise dispose of (including by way of merger, reorganization,
          consolidation, share exchange or other business combination or any
          similar transaction) securities (or options, rights or warrants to
          purchase, or securities convertible into or exchangeable for, such
          securities) representing 10% or more of the voting power of the
          Company or any of its Significant Subsidiaries; or

               (iii) any Person (other than the Grantee or any Subsidiary of
          the Grantee or the Company or, in a fiduciary capacity, any Subsidiary
          of the Company) shall have,

                                      2-
<PAGE>
 
          subsequent to the date of this Agreement, acquired beneficial
          ownership (as such term is defined in Rule 13d-3 under the Exchange
          Act) or the right to acquire beneficial ownership of, or any "Group"
          (as such term is defined under the Exchange Act) shall have been
          formed which beneficially owns or has the right to acquire beneficial
          ownership of, 10% or more of the then outstanding Company Common
          Stock.


          (d) NOTICE OF TRIGGERING EVENT.  The Company shall notify Grantee in
writing as promptly as practicable, and in any event within 24 hours, of the
occurrence of any Triggering Event, it being understood that the giving of such
notice by the Company shall not be a condition to the right of Grantee to
exercise the Option or for a Triggering Event to have occurred.

          (e) NOTICE OF EXERCISE; CLOSING.  In the event that Grantee is
entitled to and wishes to exercise the Option, it shall send to the Company a
written notice (such notice being herein referred to as an "Exercise Notice" and
                                                            ---------------     
the date of issuance of an Exercise Notice being herein referred to as the
                                                                          
"Notice Date") specifying (i) the total number of shares (or other Option
 -----------                                                             
Securities (as hereinafter defined)) it will purchase pursuant to such exercise
and (ii) a place and date not earlier than three (3) Business Days nor later
than forty (40) Business Days from the Notice Date for the closing of such
purchase (the "Option Closing Date"); provided, that if the closing of the
               -------------------                                        
purchase and sale pursuant to the Option (the "Option Closing") cannot be
                                               --------------            
consummated, by reason of any applicable Order, the period of time that
otherwise would run pursuant to this sentence shall run instead from the date on
which such restriction on consummation has expired or been terminated; and
provided further, without limiting the foregoing, that if, in the reasonable
opinion of Grantee, prior notification to or approval of any regulatory agency
is required in connection with such purchase, the Company or Grantee, as the
case may be, shall promptly file the required notice or application for approval
and shall expeditiously process the same and the period of time that otherwise
would run pursuant to this sentence shall run instead from the date on which any
required notification periods have expired or been terminated or such approvals
have been obtained and any requisite waiting period or periods shall have
passed.  In the event that (x) Grantee receives official notice that an approval
of any regulatory authority required for the purchase of Option Shares (or other
Option Securities) would not be issued or granted or (y) an Option Closing Date
shall not have occurred within one (1) year after the related Notice Date due to
the failure to obtain any such required approval, Grantee shall, to the extent
permitted by applicable Law, nevertheless be entitled to exercise its rights as
set forth herein, including without limitation the rights set forth in
Subsection 8(a) and Grantee shall be entitled to exercise the Option (or
- ---------------                                                         
Substitute Option (as defined herein)) in connection with the resale of the
Company Common Stock or other Option Securities pursuant to a registration
statement as provided in Section 9.
                         --------- 

          (f) PURCHASE PRICE.  At the Option Closing, Grantee shall pay to the
Company the aggregate Option Price in immediately available funds by wire
transfer to a bank account designated by the Company, provided that failure or
refusal of the Company to designate such a bank account shall not preclude
Grantee from exercising the Option.

                                      3-
<PAGE>
 
          (g) ISSUANCE OF COMPANY COMMON STOCK.  At the Option Closing,
simultaneously with the delivery of immediately available funds as provided in
Subsection 2(f), the Company shall deliver to Grantee a certificate or
- ---------------                                                       
certificates representing the number of shares of Company Common Stock (or other
Option Securities) purchased by Grantee and, if the Option should be exercised
in part only, a new Option evidencing the rights of Grantee thereof to purchase
the balance of the shares (or other Option Securities) purchasable hereunder.
If at the time of issuance of any Option Shares pursuant to an exercise of all
or part of the Option hereunder, the Company shall have issued any rights or
other securities which are attached to or otherwise associated with the Company
Common Stock, then each Option Share issued pursuant to such exercise shall also
represent such rights or other securities with terms substantially the same as
and at least as favorable to Grantee as are provided under any shareholder
rights agreement or similar agreement of the Company then in effect.

          (h) LEGEND.  Certificates for Company Common Stock (or other Option
Securities) delivered at a closing hereunder may be endorsed with a restrictive
legend that shall read substantially as follows:

     "The transfer of the shares represented by this certificate is subject to
resale restrictions arising under the Securities Act of 1933, as amended."

It is understood and agreed that the reference to the resale restrictions of the
Securities Act of 1933, as amended (the "Securities Act"), in the above legend
                                         --------------                       
shall be removed by delivery of substitute certificate(s) without such reference
if Grantee shall have delivered to the Company a copy of a letter from the staff
of the SEC, or an opinion of counsel, reasonably satisfactory to the Company, to
the effect that such legend is not required for purposes of the Securities Act.
In addition, such certificates shall bear any other legend as may be required by
Law.

          (i) RECORD GRANTEE; EXPENSES.  Upon the delivery by Grantee to the
Company of the Exercise Notice and the tender of the applicable Option Price in
immediately available funds, Grantee shall be deemed to be the holder of record
of the shares of Company Common Stock (or other Option Securities) issuable upon
such exercise, notwithstanding that the stock transfer books of the Company
shall then be closed or that certificates representing such shares of Company
Common Stock (or other Option Securities) shall not then be actually delivered
to Grantee or the Company shall have failed or refused to designate the bank
account described in Subsection 2(f). The Company shall pay all expenses, and
                     ---------------                                         
any and all United States federal, state and local taxes and other charges that
may be payable in connection with the preparation, issuance and delivery of
stock certificates under this Section 2 in the name of Grantee.  The Grantee
                              ---------                                     
shall pay all expenses and any and all United States federal, state, local or
other taxes or charges that may be payable in connection with the issuance and
delivery of stock certificates or a substitute option agreement in the name of
any assignee, transferee or designee of Grantee.

          3.  EVALUATION OF INVESTMENTS.  Grantee, by reason of its knowledge
and experience in financial and business matters, believes itself capable of
evaluating the merits and risks

                                      4-
<PAGE>
 
of an investment in the Option and the securities to be purchased/sold pursuant
to this Agreement (collectively the "Option Securities.")
                                     -----------------

          4.  DOCUMENTS DELIVERED.   Grantee acknowledges receipt of copies of
the following documents:

          (a) The Company's Annual Report on Form 10-K for the year ended
              December 31, 1996;

          (b) The Company's Proxy Statement for the meeting of the Company's
              stockholder held April 16, 1997; and

          (c) The Company's Quarterly Report on Form 10-Q for the quarter ended
              September 30, 1997.

          5.  INVESTMENT INTENT.  Grantee represents and warrants that it is
entering into this Agreement and is acquiring and/or will acquire the Option
Securities for its own account and not with a view to resale or distribution of
all or any part of the Option Securities in violation of applicable Law.

          6.  RESERVATION OF SHARES.  The Company agrees (i) that it shall at
all times maintain, free from preemptive rights, sufficient authorized but
unissued or treasury shares of Company Common Stock (and other Option
Securities) issuable pursuant to this Agreement so that the Option may be
exercised without additional authorization of Company Common Stock (or such
other Option Securities) after giving effect to all other options, warrants,
convertible securities and other rights to purchase Company Common Stock (or
such other Option Securities); (ii) that it will not, by charter amendment or
through reorganization, consolidation, merger, dissolution or sale of assets, or
by any other voluntary act, avoid or seek to avoid the observance or performance
of any of the covenants, stipulations or conditions to be observed or performed
hereunder by the Company; (iii) promptly to take all action as may from time to
time be required in order to permit Grantee to exercise the Option and the
Company to duly and effectively issue shares of Company Common Stock (or other
Option Securities) pursuant hereto; and (iv) (to the extent agreed to herein)
promptly to take all action provided herein to protect the rights of Grantee
against dilution.

          7.  DIVISION OF OPTION; LOST OPTIONS. This Agreement (and the Option
granted hereby) are exchangeable, without expense, at the option of Grantee,
upon presentation and surrender of this Agreement at the principal office of the
Company, for other Agreements providing for Options of different denominations
entitling the holder thereof to purchase, on the same terms and subject to the
same conditions as are set forth herein, in the aggregate the same number of
shares of Company Common Stock purchasable hereunder.  The terms "Agreement" and
                                                                  ---------     
"Option" as used herein include any Stock Option Agreements and related Options
 ------                                                                        
for which this Agreement (and the Option granted hereby) may be exchanged.  Upon
receipt by the Company of evidence reasonably satisfactory to it of the loss,
theft, destruction or mutilation of this Agreement, and (in the case of loss,
theft or destruction) of reasonably satisfactory indemnification, and upon
surrender and

                                      5-
<PAGE>
 
cancellation of this Agreement, if mutilated, the Company will execute and
deliver a new Agreement of like tenor and date.

          8.  ADJUSTMENT UPON CHANGES IN CAPITALIZATION.  The number of shares
of Company Common Stock purchasable upon the exercise of the Option shall be
subject to adjustment from time to time as provided in this Section 8.
                                                            --------- 

          (a) ADDITIONAL SHARES ADJUSTMENT.  Excluding issuances contemplated by
                                                                                
Subsection 8(b), in the event that any additional shares of Company Common
- ---------------                                                           
Stock, or any rights, options, warrants, subscriptions, calls, convertible
securities or other agreements or commitments obligating the Company to issue
any shares of Company Common Stock, are issued or otherwise become outstanding
after the date hereof (an "Increase"), the number of shares of Company Common
                           --------                                          
Stock subject to the Option shall be increased by a number of shares equal to
the product of (A) a fraction, the numerator of which is the number of shares of
Company Common Stock for which the Option was exercisable immediately prior to
the Increase and the denominator of which is the number of shares of Company
Common Stock specified in Section 1 and (B) the product of (i) ten percent (10%)
                          ---------                                             
and (ii) the number of shares of Company Common Stock issued and outstanding on
a fully diluted basis immediately after the Increase minus the number of shares
of Company Common Stock issued and outstanding on a fully diluted basis
immediately prior to the Increase; provided that the number of shares of Company
Common Stock subject to the Option shall in no event exceed ten percent (10%) of
the issued and outstanding shares of Company Common Stock on a fully diluted
basis immediately prior to exercise.

          (b) TRANSACTION ADJUSTMENT.  In the event of any change in Company
Common Stock by reason of stock dividends, splits, mergers, recapitalization,
combinations, subdivisions, conversions, exchanges of shares or other similar
transactions then, the type and number of shares of Company Common Stock
purchasable upon exercise hereof shall be appropriately adjusted so that Grantee
shall receive upon exercise of the Option and payment of the aggregate Option
Price hereunder the number and class of shares or other securities or property
that Grantee would have received in respect of Company Common Stock if the
Option had been exercised in full immediately prior to such event, or the record
date therefor, as applicable.

          (c) OPTION PRICE ADJUSTMENT.  Whenever the number of shares of Company
Common Stock subject to this Option are adjusted pursuant to Subsection 8(a) or
                                                             ------------------
8(b) the Option Price shall be adjusted by multiplying the Option Price by a
- ----                                                                        
fraction, the numerator of which shall be equal to the aggregate number of
shares of Company Common Stock purchasable under the Option prior to the
adjustment and the denominator of which shall be equal to the aggregate number
of shares of Company Common Stock purchasable under the Option immediately after
the adjustment.

          9.  REGISTRATION RIGHTS.  The Company will, if requested by the
Grantee at any time and from time to time within two (2) years of a Triggering
Event (the "Registration Period"), as expeditiously as practicable prepare, file
            -------------------                                                 
and cause to be made effective up to two registration statements under the
Securities Act if such registration is necessary or desirable in order to permit

                                      6-
<PAGE>
 
the offering, sale and delivery of any or all shares of Company Common Stock (or
other Option Securities) that have been acquired by or are issuable to the
Grantee upon exercise of the Option in accordance with the intended method of
sale or other disposition stated by the Grantee, including, at the sole
discretion of the Company,  a "shelf" registration statement under Rule 415
under the Securities Act or any successor provision, and the Company will use
all reasonable efforts to qualify such shares or other Option Securities under
any applicable state securities laws.  Without the Grantee's prior written
consent, no other securities may be included in any such registration.  The
Grantee agrees to use all reasonable efforts to cause, and to cause any
underwriters of any sale or other disposition to cause, any sale or other
disposition pursuant to such registration statement to be effected on a widely
distributed basis so that upon consummation thereof no purchaser or transferee
will own beneficially more than 5% of the then outstanding voting power of the
Company.  The Company will use all reasonable efforts to cause each such
registration statement to become effective, to obtain all consents or waivers of
other parties which are required therefor and to keep such registration
statement effective for such period not in excess of 180 days from the day such
registration statement first becomes effective as may be reasonably necessary to
effect such sale or other disposition.  The obligations of the Company hereunder
to file a registration statement and to maintain its effectiveness may be
suspended for one or more periods of time not exceeding ninety (90) days in the
aggregate if the Board of Directors of the Company shall have determined in good
faith that the filing of such registration or the maintenance of its
effectiveness would require disclosure of nonpublic information that would
materially and adversely affect the Company.  The expenses associated with the
preparation and filing of any such registration statement pursuant to this
Section 9 and any sale covered thereby (including any fees related to blue sky
- ---------                                                                     
qualifications and filing fees in respect of the Securities and Exchange
Commission or the National Association of Securities Dealers, Inc.)
("Registration Expenses") will be for the account of the Company except for
  ---------------------                                                    
underwriting discounts or commissions or brokers' fees in respect to shares of
Company Common Stock (or other Option Securities) to be sold by the Grantee and
the fees and disbursements of the Grantee's counsel; provided, however, that the
Company will not be required to pay for any Registration Expenses with respect
to such registration if the registration request is subsequently withdrawn at
the request of the Grantee unless the Grantee agrees to forfeit its right to
request one registration; provided further, however, that, if at the time of
such withdrawal the Grantee has learned of a material adverse change in the
results of operations, condition, business or prospects of the Company from that
known to the Grantee at the time of its request and has withdrawn the request
with reasonable promptness following disclosure by the Company of such material
adverse change, then the Grantee will not be required to pay any of such
expenses and will retain all remaining rights to request registration.  The
Grantee will provide all information reasonably requested by the Company for
inclusion in any registration statement to be filed hereunder.  If during the
Registration Period the Company shall propose to register under the Securities
Act the offering, sale and delivery of Company Common Stock for cash for its own
account or for any other stockholder of the Company pursuant to a firm
underwriting, it will, in addition to the Company's other obligations under this
Section 9, allow the Grantee the right to participate in such registration
- ---------                                                                 
provided that the Grantee participates in the underwriting; provided, however,
that, if the managing underwriter of such offering advises the Company in
writing that in its opinion the number of shares of Company Common Stock (or
other Option Securities) requested to be included in such registration exceeds
the number which can be sold in such offering, the Company will, after fully
including therein all

                                      7-
<PAGE>
 
shares of Company Common Stock and/or Option Securities to be sold by the
Company, include the shares of Company Common Stock (or other Option Securities)
requested to be included therein by Grantee pro rata (based on the number of
shares of Company Common Stock or other Option Securities intended to be
included therein) with the shares of Company Common Stock or other Option
Securities intended to be included therein by Persons other than the Company. In
connection with any offering, sale and delivery of Company Common Stock pursuant
to a registration statement effected pursuant to this Section 9, the Company and
                                                      ---------
the Grantee will provide each other and each underwriter of the offering with
customary representations, warranties and covenants, including covenants of
indemnification and contribution. For purposes of determining whether two
requests have been made under this Section 9, only requests relating to a 
                                   ---------
registration statement that has become effective under the Securities Act and
pursuant to which the Grantee has disposed of all shares of Company Common Stock
covered thereby in the manner contemplated therein will be counted. The
registration rights granted under this Section 9 are subject to and are limited
                                       ---------
by any registration rights previously granted by the Company and the Grantee
acknowledges the registration rights granted under this Section 9 shall be
                                                        ---------
construed subject to any such limitations.

          10.  REPURCHASE OF OPTION AND OPTION SHARES.  (b)  Within ten (10)
Business Days following the occurrence of a Repurchase Event (as defined
herein), the Company shall (i) deliver an offer (an "Option Repurchase Offer")
                                                     -----------------------  
to repurchase the Option from Grantee at a price (the "Option Repurchase Price")
                                                       -----------------------  
equal to the amount by which (A) the Competing Transaction Price (as defined
below) exceeds (B) the Option Price, multiplied by the maximum number of shares
for which the Option may then be exercised by the Grantee, and (ii) deliver an
offer (an "Option Share Repurchase Offer") to repurchase the Option Shares from
           -----------------------------                                       
each owner of Option Shares from time to time (each, an "Owner") at a price (the
                                                         -----                  
"Option Share Repurchase Price") equal to the amount by which (A) the Competing
 -----------------------------                                                 
Transaction Price exceeds (B) the Option Price, multiplied by the number of
Option Shares then held by such Owner.  The term "Competing Transaction Price"
                                                  --------------------------- 
shall mean, as of any date for the determination thereof, the price per share of
Common Stock paid pursuant to the consummation of any Acquisition Proposal (such
consummated Acquisition Proposal being referred to herein as a "Competing
                                                                ---------
Transaction") or, in the event of a sale of assets of the Company, the last per-
- -----------                                                                    
share sale price of Company Common Stock on the fourth trading day following the
announcement of such sale.  If the consideration paid or received in the
Competing Transaction shall be other than in cash, the per share value of such
consideration (on a fully diluted basis) shall be determined by a nationally
recognized investment banking firm selected by Grantee and reasonably acceptable
to the Company, which determination shall be conclusive for all purposes of this
Agreement.

          (b) REPURCHASE REQUEST.  Upon the occurrence of a Repurchase Event and
whether or not the Company shall have made an Option Repurchase Offer or Option
Share Repurchase Offer under Section 10(a), (i) at the request (the date of such
                             -------------                                      
request being the "Option Repurchase Request Date") of Grantee delivered prior
                   ------------------------------                             
to the Option Termination Date, the Company shall repurchase the Option from
Grantee at the Option Repurchase Price and (ii) at the request (the date of such
request being the "Option Share Repurchase Request Date") of any Owner delivered
                   ------------------------------------                         
prior to the Option Termination Date, the Company shall repurchase such number
of the Option

                                      8-
<PAGE>
 
Shares (to the extent clearly identifiable as such) from the Owner as the Owner
shall designate at the Option Share Repurchase Price.

          (c) REPURCHASE PROCEDURES.  Grantee or the Owner, as the case may be,
may (i) accept the Company's Option Repurchase Offer or Option Share Repurchase
Offer under Subsection 10(a) or (ii) exercise its right to require the Company
            ----------------                                                  
to repurchase the Option or any Option Shares, as the case may be, pursuant to
                                                                              
Subsection 10(b) by a written notice or notices stating that Grantee or the
- ----------------                                                           
Owner, as the case may be, elects to accept such offer or to require the Company
to repurchase the Option or the Option Shares in accordance with the provisions
of this Section 10. As promptly as practicable, and in any event within five (5)
        ----------                                                              
Business Days, after the surrender to the Company of this Agreement or
Certificates for Option Shares, as applicable, following receipt of a notice
under this Subsection 10(c), the Company shall deliver or cause to be delivered
           ----------------                                                    
to Grantee the Option Repurchase Price or to the Owner the Option Share
Repurchase Price, as the case may be.

          (d) REGULATORY APPROVALS.  The Company hereby undertakes to use its
best efforts to obtain all required regulatory and legal approvals and to file
any required notices as promptly as practicable in order to accomplish any
repurchase contemplated by this Section 10. Nonetheless, to the extent that the
                                ----------                                     
Company is prohibited under applicable Law from repurchasing the Option or any
Option Shares in full, the Company shall immediately so notify Grantee or the
Owner and thereafter deliver or cause to be delivered, from time to time, to
Grantee or the Owner, as appropriate, the portion of the Option Repurchase Price
and the Option Share Repurchase Price, respectively, that it is no longer
prohibited from delivering, within five (5) Business Days after the date on
which the Company is no longer so prohibited; provided, however, that if the
Company at any time after delivery of a notice of repurchase pursuant to Section
                                                                         -------
10(b) hereof is prohibited under applicable Law, from delivering to Grantee or
- -----                                                                         
the Owner, as appropriate, the Option Repurchase Price or the Option Share
Repurchase Price, respectively, in full, Grantee  or the Owner, as appropriate,
may revoke its notice of repurchase of the Option or the Option Shares,
respectively, either in whole or in part whereupon, in the case of a revocation
in part, the Company shall promptly (i) deliver to Grantee or the Owner, as
appropriate, that portion of the Option Repurchase Price or the Option Share
Repurchase Price that the Company is not prohibited from delivering after taking
into account any such revocation and (ii) deliver, as appropriate, either (A) to
Grantee, a new Agreement evidencing the right of Grantee to purchase that number
of shares of Company Common Stock equal to the number of shares of Company
Common Stock purchasable immediately prior to the delivery of the notice of
repurchase less the number of shares of Company Common Stock covered by the
portion of the Option repurchased or (B) to the Owner, a certificate for the
number of Option Shares covered by the revocation.  If an Option Termination
Event shall have occurred prior to the date of the notice by the Company
described in the first sentence of this Subsection 10(d), or shall be scheduled
                                        ----------------                       
to occur at any time before the expiration of a period ending on the thirtieth
day after such date, Grantee shall nonetheless have the right to exercise the
Option until the expiration of such thirty (30) day period.

                                      9-
<PAGE>
 
          (e) DEFINITION.  The term "Repurchase Event" shall mean a Triggering
                                     ----------------                         
Event followed by the consummation of any transaction included in the definition
of Competing Transaction.

          (f) COMPETING TRANSACTION.  Notwithstanding anything to the contrary
in Subsections 2(a), the delivery of a notice by Grantee or an Owner under
    ---------------                                                       
Subsection 10(b) hereof specifying that such notice is based on the Company's
- ----------------                                                             
public announcement of the execution of an agreement providing for a Competing
Transaction shall be deemed to constitute an election to exercise the Option, as
to the number of Option Shares not heretofore purchased pursuant to one or more
prior exercises of the Option, on the fifth Business Day following the public
announcement of the consummation of the transaction contemplated by such
agreement, in which event a closing shall occur with respect to such unpurchased
Option Shares in accordance with Subsection 2(e).
                                 --------------- 

          (g) REPRESENTATIONS.  In connection with any purchase/sale of the
Option or the Option Shares pursuant to this Section 10, the Grantee and/or the
                                             ----------                        
Owner, as applicable, will be required to represent and warrant to the Company
that such Person is the owner of the Option/Option Shares being purchased, free
and clear of all adverse claims and that such Person will deliver good title to
such Option/Option Shares to the Company, free and clear of all adverse claims,
upon consummation of any purchase/sale pursuant to this Section 10.
                                                        ---------- 

          11.  SUBSTITUTE OPTION IN THE EVENT OF CORPORATE CHANGE.  (a)  In the
event that prior to an Option Termination Event, the Company shall enter into an
agreement (i) to consolidate with or merge into any person, other than Grantee
or one of its Subsidiaries, and shall not be the continuing or surviving
corporation of such consolidation or merger, (ii) to permit any person, other
than Grantee or one of its Subsidiaries, to merge into the Company and the
Company shall be the continuing or surviving corporation, but, in connection
with such merger, the then outstanding shares of Company Common Stock shall be
changed into or exchanged for stock or other securities of any other person or
cash or any other property or the then outstanding shares of Company Common
Stock shall after such merger represent less than 50% of the outstanding shares
and share equivalents of the merged company, or (iii) to sell or otherwise
transfer all or substantially all of its assets to any person, other than
Grantee or one of its Subsidiaries, then, and in each such case, the agreement
governing such transaction shall make proper provision so that the Option shall,
upon the consummation of any such transaction and upon the terms and conditions
set forth herein, be converted into, or exchanged for, an option (the
                                                                     
"Substitute Option"), at the election of Grantee, of either (x) the Acquiring
 -----------------                                                           
Corporation (as hereinafter defined) or (y) any person that controls the
Acquiring Corporation subsequent to the consolidation, merger or sale in
question.

          (b) DEFINITIONS.  The following terms have the meanings indicated:

              (1) "Acquiring Corporation" shall mean (i) the continuing or
                   ---------------------                                  
          surviving corporation of a consolidation or merger with the Company
          (if other than the Company), (ii) the Company in a merger in which the
          Company is the continuing or surviving person, and (iii) the
          transferee of all or substantially all of the Company's assets.

                                      10-
<PAGE>
 
               (2) "Substitute Common Stock" shall mean the common stock issued
                    -----------------------                                    
          by the Company upon exercise of the Substitute Option.

               (3) "Assigned Value" shall mean the Competing Transaction Price,
                    --------------                                             
          as defined in Section 10.
                        ---------- 

               (4) "Average Price" shall mean the average closing price of a
                    -------------                                           
          share of the Substitute Common Stock for the ninety (90) days
          immediately preceding the consolidation, merger or sale in question;
          provided that if the Company is the issuer of the Substitute Option,
          the Average Price shall be computed with respect to a share of common
          stock issued by the Company, the Person merging into the Company or by
          any company which controls or is controlled by such Person subsequent
          to the consideration merger or sale in question, as Grantee may elect.

          (c) TERMS OF THE SUBSTITUTE OPTION.  The Substitute Option shall have
the same terms as the Option; provided that if the terms of the Substitute
Option cannot, for legal reasons, be the same as the Option, such terms shall be
as similar as possible and in no event less advantageous to Grantee.  The issuer
of the Substitute Option shall also enter into an agreement with Grantee in
substantially the same form as this Agreement, which agreement shall be
applicable to the Substitute Option.

          (d) SUBSTITUTE COMMON STOCK.  The Substitute Option shall be
exercisable for such number of shares of Substitute Common Stock as is equal to
the Assigned Value multiplied by the number of shares of Company Common Stock
for which the Option is then exercisable, divided by the Average Price.  The
exercise price of the Substitute Option per share of Substitute Common Stock
shall then be equal to the Option Price multiplied by a fraction, the numerator
of which shall be the number of shares of Company Common Stock for which the
Option is then exercisable and the denominator of which shall be the number of
shares of Substitute Common Stock for which the Substitute Option is
exercisable.

          (e) LIMITATION.  In no event, pursuant to any of the foregoing
paragraphs, shall the Substitute Option be exercisable for more than ten percent
(10%) of the shares of Substitute Common Stock issued and outstanding prior to
exercise of the Substitute Option.

          (f) ASSUMPTION OF OBLIGATION.  The Company shall not enter into any
transaction described in Subsection 11(a) unless the Acquiring Corporation and
                         ----------------                                     
any person that controls the Acquiring Corporation assume in writing all the
obligations of the Company hereunder.

          12. EXTENSION OF TIME FOR REGULATORY APPROVALS.  The periods related
to exercise of the Option and the other rights of Grantee hereunder shall be
extended (i) to the extent necessary to obtain all regulatory approvals for the
exercise of such rights, and for the expiration of all statutory waiting periods
and (ii) to the extent necessary to avoid liability under Section 10(b) of the
Exchange Act by reason of such exercise.

                                      11-
<PAGE>
 
          13. REPRESENTATIONS AND WARRANTIES OF THE COMPANY.  The Company
hereby represents and warrants to Grantee as follows:

          (a) AUTHORITY.  The Company has full corporate power and authority to
execute and deliver this Agreement and to consummate the transactions
contemplated hereby.  The execution and delivery of this Agreement and the
consummation of the transactions contemplated hereby have been duly and validly
authorized by the Board of Directors of the Company and no other corporate
proceedings on the part of the Company are necessary to authorize this Agreement
or to consummate the transactions so contemplated.  This Agreement has been duly
and validly executed and delivered by the Company.  This Agreement is the valid
and legally binding obligation of the Company, enforceable against the Company
in accordance with its terms subject to bankruptcy, insolvency, reorganization,
moratorium or similar laws now or hereafter in effect relating to creditors'
rights generally or to general principles of equity.

          (b) CORPORATE ACTION.  The Company has taken all necessary corporate
action to authorize and reserve and to permit it to issue, and at all times from
the date hereof through the termination of this Agreement in accordance with its
terms will have reserved for issuance upon the exercise of the Option, that
number of shares of Company Common Stock equal to the maximum number of shares
of Company Common Stock at any time and from time to time issuable hereunder,
and all such shares of Company Common Stock, upon issuance pursuant hereto, will
be duly authorized, validly issued, fully paid, nonassessable, and will be
delivered free and clear of all Liens and not subject to any preemptive rights.

          (c) NO CONFLICT.  The execution and delivery of this Agreement does
not, and the consummation of the transactions contemplated hereby will not,
conflict with, or result in any violation pursuant to any provisions of the
Certificate of Incorporation or by-laws of the Company or any Subsidiary of the
Company, subject to obtaining any approvals or consents contemplated hereby,
result in any violation of any loan or credit agreement, note, mortgage,
indenture, lease, plan or other agreement, obligation, instrument, permit,
concession, franchise, license, judgment, order, decree, statute, law,
ordinance, rule or regulation applicable to the Company or any Subsidiary of the
Company or their respective properties or assets.

          (d) ANTI-TAKEOVER STATUTES.  The provisions of Section 203 of the
General Corporation Law of the State of Delaware will not, prior to the
termination of this Agreement, apply to this Agreement or the transactions
contemplated hereby and thereby.  The Company has taken, and will in the future
take, all steps necessary to irrevocably exempt the transactions contemplated by
this Agreement from any other applicable state takeover law and from any
applicable charter or contractual provision containing change of control or
anti-takeover provisions.

          14. ASSIGNMENT.  The Company may not assign any of its rights or
obligations under this Agreement or the Option created hereunder to any other
Person, without the express written consent of Grantee.  Grantee may not assign
any of its rights or obligations under this Agreement or the Option created
hereunder to any other Person without the consent of the Company (which consent
will not be unreasonably withheld).

                                      12-
<PAGE>
 
          15.  APPLICATION FOR REGULATORY APPROVAL.  Each of Grantee and the
Company will use its best efforts to make all filings with, and to obtain
consents of, all third parties and governmental authorities necessary to the
consummation of the transactions contemplated by this Agreement, including
without limitation making application to list the shares of Company Common Stock
issuable hereunder on the Nasdaq National Market of The Nasdaq Stock Market,
Inc. upon official notice of issuance.

          16.  SPECIFIC PERFORMANCE.  The parties hereto acknowledge that
damages would be an inadequate remedy for a breach of this Agreement by either
party hereto and that the obligations of the parties hereto shall be enforceable
by either party hereto through injunctive or other equitable relief.

          17.  SEPARABILITY OF PROVISIONS.  If any term, provision, covenant or
restriction contained in this Agreement is held by a court or a federal or state
regulatory agency of competent jurisdiction to be invalid, void or
unenforceable, the remainder of the terms, provisions and covenants and
restrictions contained in this Agreement shall remain in full force and effect,
and shall in no way be affected, impaired or invalidated.

          18.  NOTICES.  All notices, claims, demands and other communications
hereunder shall be deemed to have been duly given or made when delivered in
person, by registered or certified mail (postage prepaid, return receipt
requested), by overnight courier or by facsimile at the respective addresses of
the parties set forth in the Merger Agreement.

          19.  GOVERNING LAW.  This Agreement shall be governed by and construed
in accordance with the laws of the State of Delaware, regardless of the laws
that might otherwise govern under applicable principles of conflicts of laws
thereof.

          20.  COUNTERPARTS.  This Agreement may be executed in two or more
counterparts, each of which will be deemed to be an original, but all of which
shall constitute one and the same agreement.

          21.  DEFINITIONS.  Capitalized terms used and not defined herein shall
have the meanings set forth in the Merger Agreement.

          22.  EXPENSES.  Except as otherwise expressly provided herein or in
the Merger Agreement, each of the parties hereto shall bear and pay all costs
and expenses incurred by it or on its behalf in connection with the transactions
contemplated hereunder, including fees and expenses of its own financial
consultants, investment bankers, accountants and counsel.

          23.  ENTIRE AGREEMENT.  Except as otherwise expressly provided herein
or in the Merger Agreement, this Agreement contains the entire agreement between
the parties with respect to the transactions contemplated hereunder and
supersedes all prior arrangements or understandings with respect thereof,
written or oral.  The terms and conditions of this Agreement shall inure to the
benefit of and be binding upon the parties hereto and their respective
successors and permitted

                                      13-
<PAGE>
 
assigns. Nothing in this Agreement, expressed or implied, is intended to confer
upon any party, other than the parties hereto, and their respective successors
and permitted assigns, any rights, remedies, obligations or liabilities under or
by reason of this Agreement, except as expressly provided herein. Any provision
of this Agreement may be waived only in writing at any time by the party that is
entitled to the benefits of such provision. This Agreement may not be modified,
amended, altered or supplemented except upon the execution and delivery of a
written agreement executed by the parties hereto.

          24.  FIRST REFUSAL.  If the Grantee shall desire to sell, assign,
transfer or otherwise dispose of all or any of the shares of Company Common
Stock or other Option Securities acquired by it pursuant to the Option, it will
give the Company written notice of the proposed transaction (an "Offeror's
                                                                 ---------
Notice"), identifying the proposed transferee, accompanied by a copy of a
- ------                                                                   
binding to purchase such shares of Company Common Stock, Options or other Option
Securities signed by such transferee and setting forth the terms of the proposed
transaction.  An Offeror's Notice will be deemed an offer by the Grantee to the
Company, which may be accepted, in whole but not in part, within ten (10)
Business Days of the receipt of such Offeror's Notice, on the same terms and
conditions and at the same price at which the Grantee is proposing to transfer
such shares of Company Common Stock, Options or other Option Securities to such
transferee.  The purchase of any such shares of Company Common Stock, Options or
other Option Securities by the Company will be settled within ten (10) Business
Days of the date of the acceptance of the offer and the purchase price will be
paid to the Grantee in immediately available funds.  In the event of the failure
or refusal of the Company to purchase all the shares of Company Common Stock,
Options or other Option Securities covered by an Offeror's Notice, the Grantee
may, within sixty (60) days from the date of the Offeror's Notice, sell all, but
not less than all, of such shares of Company Common Stock, Options or other
Option Securities to the proposed transferee at no less than the price specified
and on terms no more favorable than those set forth in the Offeror's Notice;
provided, however, that the provisions of this sentence will not limit the
rights the Grantee may otherwise have if the Company has accepted the offer
contained in the Offeror's Notice and wrongfully refuses to purchase the shares
of Company Common Stock, Options or other Option Securities subject thereto. The
requirements of this Section 24 will not apply to (a) any disposition as a
                     ----------                                           
result of which the proposed transferee would own beneficially not more than 2%
of the outstanding voting power of the Company, (b) any disposition of Company
Common Stock or other Option Securities by a Person to whom the Grantee has
assigned its rights under the Option with the consent of the Company, (c) any
sale by means of a public offering registered under the Securities Act or (d)
any transfer to a wholly-owned Subsidiary of the Grantee which agrees in writing
to be bound by the terms hereof.

          25.  LIMITATION OF GRANTEE PROFIT.  (a)  Notwithstanding any other
provision of this Agreement, in no event shall Grantee's Total Profit (as
hereinafter defined) exceed in the aggregate $7,278,000 and, if it otherwise
would exceed such amount, Grantee, at its sole election, shall either (i) reduce
the number of shares of Company Common Stock subject to this Option, (ii)
deliver to the Company for cancellation Option Shares previously purchased by
Grantee, (iii) pay cash to the Company, or (iv) any combination thereof, so that
Grantee's actually realized Total Profit shall not exceed in the aggregate
$7,278,000 after taking into account the foregoing actions.

                                      14-
<PAGE>
 
          (b)  As used herein, the term "Total Profit" shall mean the sum of (i)
                                         ------------                           
(x) the amount (before taxes but net of reasonable and customary commissions
paid or payable in connection with such transaction) received or receivable by
the Grantee pursuant to the sale of Option Shares (or any other securities or
property into which such Option Shares are converted or exchanged) to any
unaffiliated Person(s) or to the Company with respect to such Option Shares (or
any other securities or property into which such Option Shares are converted or
exchanged), less (y) Grantee's purchase price for such Option Shares (or any
other securities or property into which such Option Shares are converted or
exchanged), (ii) any amounts (before taxes but net of reasonable and customary
commissions paid or payable in connection with such transaction) received or
receivable by the Grantee on the transfer of the Option (or any portion thereof)
to any unaffiliated Person(s) (if permitted hereunder) or to the Company, (iii)
any equivalent amount(s) with respect to the Substitute Option, and (iv) the
amount received by the Grantee pursuant to Subsection 9.2(b) of the Merger
                                          ------------------              
Agreement.

          26.  FURTHER ASSURANCES.  In the event of any exercise of the Option
by Grantee, the Company and Grantee shall execute and deliver all other
documents and instruments and take all other action that may be reasonably
necessary in order to consummate the transactions provided for by such exercise.
Nothing contained in this Agreement shall be deemed to authorize the Company or
Grantee to breach any provision of the Merger Agreement.

                                      15-
<PAGE>
 
          IN WITNESS WHEREOF,  each of the parties hereto has caused this
Agreement to be executed as of the date first written above by their respective
officers thereunto duly authorized.

                         UNITRODE CORPORATION


                         By:
                            --------------------------------------------
                            Name:
                            Title:


                         BENCHMARQ MICROELECTRONICS, INC.


                         By:
                            --------------------------------------------
                            Name:
                            Title:

<PAGE>
 
                                                        ANNEX C
                                                   BENCHMARQ Affiliates

                             AFFILIATE'S AGREEMENT

                                         , 1998


Unitrode Corporation
7 Continental Boulevard
Merrimack, New Hampshire 03054-4334



Ladies and Gentlemen:

     The undersigned has been advised that, as of the date hereof, the
undersigned may be deemed to be an "affiliate" of BENCHMARQ Microelectronics,
Inc., a Delaware corporation (the "Company"), as that term is defined for
purposes of paragraphs (c) and (d) of Rule 145 of the Regulations of the
Securities and Exchange Commission under the Securities Act of 1933, as amended
(the "Securities Act").

     Pursuant to the terms and subject to the conditions of that certain
Agreement and Plan of Merger by and among Unitrode Corporation, a Maryland
corporation ("Acquiror"), Merrimack Corporation, a newly formed Delaware
corporation and a wholly-owned Subsidiary of Acquiror ("Newco"), and the
Company, dated as of March 2, 1998 (the "Merger Agreement"), providing for,
among other things, the merger of Newco with and into the Company (the
"Merger"), the undersigned will be entitled to receive shares of Acquiror Common
Stock in exchange for shares of Company Common Stock owned by the undersigned at
the Effective Time of the Merger as determined pursuant to the Merger Agreement.
Capitalized terms used but not defined herein are defined in the Merger
Agreement and are used herein with the same meanings ascribed to them therein.
 
     The undersigned understands that the Merger will be treated for financial
accounting purposes as a "pooling of interests" in accordance with GAAP and that
the staff of the Commission has issued certain guidelines that should be
followed to ensure the application of pooling of interests accounting to the
transaction.
 
     In consideration of the agreements contained herein, the Acquiror's
reliance on this letter in connection with the consummation of the Merger and
for other good and valuable consideration, the receipt and sufficiency of which
are hereby acknowledged, the undersigned hereby agrees that the undersigned will
not make any sale, transfer, assignment, pledge, hypothecation or other
encumbrance or disposition of, or in any way reduce the undersigned's risk with
respect to (i) Company Common Stock during the period from the date hereof until
the earlier of the Effective Time and the termination of the Merger Agreement
(which period, if the Merger is consummated, will be greater than thirty (30)
days) or (ii) Acquiror Common Stock now owned or hereafter acquired by the
undersigned, including, without limitation, the Acquiror Common Stock to be
received by the undersigned pursuant to the Merger, until such time as financial
statements that include at least thirty (30) days of combined operations of the
Company and the Acquiror after the Merger will have been publicly reported,
unless the undersigned will have delivered to the Acquiror, prior to any such
sale, transfer or other disposition, a written opinion from Coopers & Lybrand
L.L.P. independent public accountants for the Acquiror, or a written no-action
letter from the accounting staff of the Commission, in either case in form and
substance reasonably satisfactory to the Acquiror, to the effect that such sale,
transfer or other disposition will not cause the Merger not to be treated as a
"pooling of interests" for financial accounting purposes in accordance with GAAP
and the Regulations of the Commission.
<PAGE>
 
     The undersigned has been advised that the offering, sale and delivery of
the shares of Acquiror Common Stock pursuant to the Merger will have been
registered with the Commission under the Securities Act on a Registration
Statement on Form S-4.  The undersigned also has been advised, however, that,
because the undersigned may be deemed to be an Affiliate of the Company at the
time the Merger is submitted for a vote of the stockholders of the Company, the
Acquiror Common Stock received by the undersigned pursuant to the Merger can be
sold by the undersigned only (i) pursuant to an effective registration statement
under the Securities Act, (ii) in conformity with the volume and other
limitations of Rule 145 promulgated by the Commission under the Securities Act
or (iii) in reliance upon an exemption from registration that is available under
the Securities Act.

     The undersigned also understands that "stop transfer" instructions will be
given to the transfer agent for the Company Common Stock with respect to shares
of the Company Common Stock now owned or hereafter acquired by the undersigned
and that there will be placed on the certificates representing such shares of
Company Common Stock, or any substitutions therefor, a legend stating in
substance as follows:

     "These shares may be transferred only in accordance with the terms of an
     Affiliate's Agreement between the original holder of such shares and
     Unitrode Corporation, a copy of which agreement is on file at the principal
     offices of Unitrode Corporation.

It is understood and agreed that the legend set forth above will be removed upon
surrender of certificates bearing such legend by delivery of substitute
certificates without such legend (i) if the undersigned will have delivered to
the Acquiror the above-referenced opinion of Coopers & Lybrand L.L.P. or the
above-referenced no-action letter from the accounting staff of the Commission or
(ii) upon the termination of the Merger Agreement.

     The undersigned also understands that "stop transfer" instructions will be
given to the transfer agent for the Acquiror Common Stock with respect to shares
of the Acquiror Common Stock now owned or hereafter acquired by the undersigned
(other than shares of Acquiror Common Stock to be received by the undersigned
pursuant to the Merger) and that there will be placed on the certificates
representing such shares of Acquiror Common Stock, or any substitutions
therefor, a legend stating in substance as follows:

     "These shares may be transferred only in accordance with the terms of an
     Affiliate's Agreement between the original holder of such shares and
     Unitrode Corporation, a copy of which agreement is on file at the principal
     offices of Unitrode Corporation."

It is understood and agreed that the legend set forth above will be removed upon
surrender of certificates bearing such legend by delivery of substitute
certificates without such legend (i) if the undersigned will have delivered to
the Acquiror the above-referenced opinion of Coopers & Lybrand L.L.P. or the
above-referenced no-action letter from the accounting staff of the Commission or
(ii) upon the termination of the Merger Agreement.

     The undersigned also understands that "stop transfer" instructions will be
given to the transfer agent for the Acquiror Common Stock with respect to shares
of the Acquiror Common Stock to be received by the undersigned pursuant to the
Merger and that there will be placed on the certificates representing such
shares of Acquiror Common Stock, or any substitutions therefor, a legend stating
in substance as follows:

     "These shares were issued in a transaction to which Rule 145 promulgated
     under the Securities Act of 1933, as amended, applies.  These shares may be
     transferred only in accordance with the terms of such Rule and an
     Affiliate's Agreement between the original holder of such shares and
     Unitrode Corporation, a copy of which agreement is on file at the principal
     offices of Unitrode Corporation.

It is understood and agreed that the legend set forth above will be removed upon
surrender of certificates bearing such legend by delivery of substitute
certificates without such legend if the undersigned will have delivered to the
Acquiror an opinion of counsel, in form and substance reasonably satisfactory to
the Acquiror, to the effect that 

                                       2
<PAGE>
 
(i) the sale or disposition of the shares represented by the surrendered
certificates may be effected without registration of the offering, sale and
delivery of such shares under the Securities Act, (ii) the shares to be so
transferred may be publicly offered, sold and delivered by the transferee
thereof without compliance with the registration provisions of the Securities
Act and (iii) the undersigned will have delivered to the Acquiror the above-
referenced opinion of Coopers & Lybrand L.L.P. or the above-referenced no-action
letter from the accounting staff of the Commission.

     The Acquiror agrees that it will not unreasonably refuse to consent to, or
unreasonably delay, the removal of the foregoing legends.

     By its execution hereof, the Acquiror agrees that it will, as long as the
undersigned owns any Acquiror Common Stock to be received by the undersigned
pursuant to the Merger, take all reasonable efforts to make timely filings with
the Commission of all reports required to be filed by it pursuant to the
Exchange Act and will promptly furnish upon written request of the undersigned a
written statement confirming that such reports have been so timely filed.

     If you are in agreement with the foregoing, please so indicate by signing
below and returning a copy of this letter to the undersigned, at which time this
letter will become a binding agreement between us.

                                        Very truly yours,


                                        By:
                                           -------------------------------------
                                            Name:
                                                 -------------------------------
                                            Title:
                                                  ------------------------------
                                            Date:
                                                 -------------------------------
                                            Address:
                                                    ----------------------------

ACCEPTED this ___ day
of _____________________, 1998

Unitrode Corporation

By:
   ------------------------------------
   Name:
        -------------------------------
   Title:
         ------------------------------

                                       3
<PAGE>
 
                                                                         ANNEX D
                                                             Unitrode Affiliates


                             AFFILIATE'S AGREEMENT

                                     , 1998


Unitrode Corporation
7 Continental Boulevard
Merrimack, New Hampshire 03054-4334



Ladies and Gentlemen:

     The undersigned has been advised that, as of the date hereof, the
undersigned may be deemed to be an "affiliate" of Unitrode Corporation, a
Maryland corporation (the "Acquiror"), as that term is defined in the
Regulations of the Securities and Exchange Commission under the Securities Act
of 1933, as amended (the "Securities Act").

     The undertakings contained in this Affiliate's Agreement are being given by
the undersigned in connection with that certain Agreement and Plan of Merger by
and among Acquiror, Merrimack Corporation, a newly formed Delaware corporation
and a wholly-owned Subsidiary of Acquiror ("Newco"), and BENCHMARQ
Microelectronics, Inc., a Delaware corporation (the "Company"), dated as of
March 2, 1998 (the "Merger Agreement"), providing for, among other things, the
merger of Newco with and into the Company (the "Merger"). Capitalized terms used
but not defined herein are defined in the Merger Agreement and are used herein
with the same meanings ascribed to them therein.
 
     The undersigned understands that the Merger will be treated for financial
accounting purposes as a "pooling of interests" in accordance with GAAP and that
the staff of the Commission has issued certain guidelines that should be
followed to ensure the application of pooling of interests accounting to the
transaction.
 
     In consideration of the agreements contained herein, the Acquiror's
reliance on this letter in connection with the consummation of the Merger and
for other good and valuable consideration, the receipt and sufficiency of which
are hereby acknowledged, the undersigned hereby agrees that the undersigned will
not make any sale, transfer, assignment, pledge, hypothecation or other
encumbrance or disposition of, or in any way reduce the undersigned's risk with
respect to (i) Company Common Stock during the period from the date hereof until
the earlier of the Effective Time and the termination of the Merger Agreement
(which period, if the Merger is consummated, will be greater than thirty (30)
days) or (ii) Acquiror Common Stock now owned or hereafter acquired by the
undersigned, including, without limitation, the Acquiror Common Stock, if any,
received by the undersigned pursuant to the Merger, until such time as financial
statements that include at least thirty (30) days of combined operations of the
Company and the Acquiror after the Merger will have been publicly reported,
unless the undersigned will have delivered to the Acquiror, prior to any such
sale, transfer or other disposition, a written opinion from Coopers & Lybrand
L.L.P., independent public accountants for the Acquiror, or a written no-action
letter from the accounting staff of the Commission, in either case in form and
substance reasonably satisfactory to the Acquiror, to the effect that such sale,
transfer or other disposition will not cause the Merger not to be treated as a
"pooling of interests" for financial accounting purposes in accordance with GAAP
and the Regulations of the Commission.

     The undersigned also understands that "stop transfer" instructions will be
given to the transfer agent for the Company Common Stock with respect to shares
of the Company Common Stock now owned or hereafter acquired 
<PAGE>
 
by the undersigned that there will be placed on the certificates representing
such shares of Company Common Stock, or any substitutions therefor, a legend
stating in substance as follows:

     "These shares may be transferred only in accordance with the terms of an
     Affiliate's Agreement between the original holder of such shares and
     Unitrode Corporation, a copy of which agreement is on file at the principal
     offices of Unitrode Corporation."

It is understood and agreed that the legend set forth above will be removed upon
surrender of certificates bearing such legend by delivery of substitute
certificates without such legend (i) if the undersigned will have delivered to
the Acquiror the above-referenced opinion of Coopers & Lybrand L.L.P. or the
above-referenced no-action letter from the accounting staff of the Commission or
(ii) upon the termination of the Merger Agreement.

     The undersigned also understands that instructions will be given to the
transfer agent for the Acquiror Common Stock with respect to shares of the
Acquiror Common Stock now owned or hereafter acquired by the undersigned (other
than shares of Acquiror Common Stock to be received by the undersigned pursuant
to the Merger) and that there will be placed on the certificates representing
such shares of Acquiror Common Stock, or any substitutions therefor, a legend
stating in substance as follows:

     "These shares may be transferred only in accordance with the terms of an
     Affiliate's Agreement between the original holder of such shares and
     Unitrode Corporation, a copy of which agreement is on file at the principal
     offices of Unitrode Corporation."

It is understood and agreed that the legend set forth above will be removed upon
surrender of certificates bearing such legend by delivery of substitute
certificates without such legend (i) if the undersigned will have delivered to
the Acquiror the above-referenced opinion of Coopers & Lybrand L.L.P. or the
above-referenced no-action letter from the accounting staff of the Commission or
(ii) upon the termination of the Merger Agreement.

     The undersigned also understands that "stop transfer" instructions will be
given to the transfer agent for the Acquiror Common Stock with respect to shares
of the Acquiror Common Stock to be received by the undersigned pursuant to the
Merger and that there will be placed on the certificates representing such
shares of Acquiror Common Stock, or any substitutions therefor, a legend stating
in substance as follows:

     "These shares were issued in a transaction to which Rule 145 promulgated
     under the Securities Act of 1933, as amended, applies.  These shares may be
     transferred only in accordance with the terms of such Rule and an
     Affiliate's Agreement between the original holder of such shares and
     Unitrode Corporation, a copy of which agreement is on file at the principal
     offices of Unitrode Corporation."

It is understood and agreed that the legend set forth above will be removed upon
surrender of certificates bearing such legend by delivery of substitute
certificates without such legend if the undersigned will have delivered to the
Acquiror an opinion of counsel, in form and substance reasonably satisfactory to
the Acquiror, to the effect that (i) the sale or disposition of the shares
represented by the surrendered certificates may be effected without registration
of the offering, sale and delivery of such shares under the Securities Act, (ii)
the shares to be so transferred may be publicly offered, sold and delivered by
the transferee thereof without compliance with the registration provisions of
the Securities Act and (iii) the undersigned will have delivered to the Acquiror
the above-referenced opinion of Coopers & Lybrand L.L.P. or the above-referenced
no-action letter from the accounting staff of the Commission.

     The Acquiror agrees that it will not unreasonably refuse to consent to, or
unreasonably delay, the removal of the foregoing legends.

                                       2
<PAGE>
 
     If you are in agreement with the foregoing, please so indicate by signing
below and returning a copy of this letter to the undersigned, at which time this
letter will become a binding agreement between us.

                                        Very truly yours,


                                        By:
                                           -------------------------------------
                                           Name:
                                                --------------------------------
                                           Title:
                                                 -------------------------------
                                           Date:
                                                --------------------------------
                                           Address:
                                                   -----------------------------

ACCEPTED this ___ day
of __________, 1998

Unitrode Corporation

By:
   -------------------------------------
   Name:
        --------------------------------
   Title:
         -------------------------------


                                       3

<PAGE>
 
                                                                    EXHIBIT 99.1


For further information, please contact:

At BENCHMARQ:                           At Unitrode:
- -------------                           -----------
Patty Smith                             S. Kelley MacDonald, Vice President
Manager, Corporate Communications       Corporate Communications,
BENCHMARQ Microelectronics, Inc.        Unitrode Corporation,
17919 Waterview Parkway                 7 Continental Boulevard
Dallas, TX 75252                        Merrimack, NH 03054
(972)-437-9195                          (603) 429-8767
e-mail: [email protected]       e-mail: [email protected]


                    UNITRODE AND BENCHMARQ ANNOUNCE MERGER
                    --------------------------------------

          MERGER EXPANDS MARKET OPPORTUNITIES IN PORTABLE SEGMENT
          -------------------------------------------------------

Merrimack, NH (March 2, 1998) -- Unitrode Corporation (NYSE--UTR) and BENCHMARQ
Microelectronics, Inc. (NASDAQ-BMRQ) jointly announced today that their
respective boards of directors have unanimously approved a merger in order to
accelerate penetration of the portable power market and increase growth
opportunities in other rapidly growing markets targeted by the new company.

The parties have entered into a definitive merger agreement under which
BENCHMARQ shareholders will receive one share of Unitrode Common Stock for each
share of BENCHMARQ Common Stock outstanding, subject to adjustment under certain
conditions. Based on the February 27, 1998 closing price of Unitrode Common
Stock on the New York Stock Exchange and the current number of shares
outstanding, the transaction is valued at approximately $135 million. The
exchange ratio will be subject to adjustment in the event that the average per
share trading prices of Unitrode Common Stock over a specified period is less
than $16 per share or greater than $24 per share. Under the adjustment
provision, the number of shares of Unitrode Common Stock to be issued for each
BENCHMARQ share will not exceed 1.33 shares of Unitrode Common Stock.

Robert J. Richardson, currently president and chief executive officer of
Unitrode, will become Chairman and Chief Executive Officer of the combined
companies, and Alan R.
<PAGE>
 
Schuele, currently President and Chief Executive Officer of BENCHMARQ, will
assume the position of President and Chief Operating Officer. Robert L. Gable
and Derrell C. Coker, currently serving as Chairmen of the Boards of Unitrode
and BENCHMARQ, respectively, will step down from these positions upon completion
of the merger.

Commenting on the merger, Richardson said, "The combination of Unitrode and
BENCHMARQ will create a strong market presence in power management and battery
management ICs and modules. Each company has a well-established competence in
complementary technologies which will allow the combined companies to accelerate
the development of proprietary products for the rapidly growing portable power
segment of computer and communications markets."

Schuele also commented, "Both companies bring significant value to the new
company. BENCHMARQ's highly regarded mixed-signal CMOS design expertise and
strong relationships with customers for battery management combines well with
Unitrode's comprehensive management team, access to BiCMOS process technology,
and expanded manufacturing capabilities. The combination of two well-established
sales channels will provide an excellent basis for growth."

Richardson concluded, "Al and I are committed to make this merger a true
partnership of the two former companies which draws on the strength of each to
enhance the value of the new entity to stockholders, customers, and employees.
With no debt from the outset, this enterprise is in the strongest possible
position to pursue profitable growth through product and market expansion."

Commenting on the outlook for the combined businesses, CEO Richardson said, "The
prospects for long-term growth of the new company are significant. Certain areas
of power management, particularly portable power, and interface applications,
are rapidly growing and these will become increasingly larger portions of the
combined companies. However, both companies have indicated in previous public
statements that the near-term
<PAGE>
 
results of each are constrained by current market conditions. An important
benefit of the merger is that, over time, it will reduce the significance of the
disk drive market and the NVSRAM products, which are impacting the near-term
results of Unitrode and BENCHMARQ, respectively. The continuing success of the
faster-growing and more stable product groups will foster the long-term
profitable growth of the combined companies."

The combined company would be a $222 million manufacturer of broad-based analog
and mixed-signal integrated circuits, with recognized leadership in power
management and battery management applications. Products will be sold worldwide
to a diversified customer base in computer, industrial, communications, and
consumer markets. The combined companies will be headquartered in Merrimack, New
Hampshire, and will employ a total of approximately 875 people worldwide. All
present manufacturing and design centers of both companies will remain in
operation. Organizational and operating details of the new business will be
announced over the next few months.

The merger is subject to the approval of the stockholders of both companies, as
well as other customary closing conditions. Shareholders of BENCHMARQ holding an
aggregate of approximately 20% of the outstanding stock have committed to vote
in favor of the transaction. The transaction is expected to be tax-free and to
be accounted for on a "pooling of interests" basis.

At the same time, the Board of Unitrode Corporation announced that it has
rescinded its unused and previously authorized repurchase of up to one million
shares of its common stock.

Unitrode Corporation designs and manufactures analog/linear and mixed-signal
integrated circuits, principally to perform power management, motion control,
and interface functions. Its products are sold throughout the world for a
variety of computer, tele- and data- communications, defense/aerospace,
industrial, and automotive
<PAGE>
 
applications. Further information about Unitrode may be found at the Company's
homepage site: http://www.unitrode.com.

BENCHMARQ Microelectronics, Inc. designs and manufactures battery management ICs
and modules and nonvolatile product, which include RTC ICs and modules, and
NVSRAM modules and nonvolatile controller ICs and modules. BENCHMARQ markets its
products world wide through a network of distributors and independent
manufacturers' representatives.

Regarding BENCHMARQ Microelectronics, Inc:
- ------------------------------------------

The statements contained in this press release, other than historical
information, constitute forward-looking statements within the meaning of the
Private Securities Litigation Reform Act of 1995 and various factors may impact
upon such statements, including, without limitation, (i) certain risks detailed
from time-to-time in the Company's filings with the SEC, including, without
limitation, its: prospectus, dated Dec. 1, 1995, as supplemented on Dec. 21,
1995; Annual Report on Form 10-K for the fiscal year ended Dec.31, 1996; and
Quarterly Report on Form 10-Q for the three-and nine month periods ended
Sept.30, 1997, (ii) inability of the Company to satisfy its production/delivery
obligations due to disruption of production, (iii) inability to obtain raw
materials, (iv) cancellation of orders by customers, (v) changes in the credit
worthiness of customers, (vi) political and/or economic disruption in the
markets for the Company's products, (ix) obsolescence of the Company's products,
(x) expenses related to legal disputes and adverse legal rulings in such
disputes, (xi) inability of the Company to timely complete the development of
certain of its products, (xii) inability of the Company to manage its effective
income tax rate and (xiii) inability of the Company to utilize or renegotiate
its option wafers under its wafer supply arrangements.
<PAGE>
 
Regarding Unitrode Corporation:
- -------------------------------

Statements in this news release are made pursuant to the safe-harbor provisions
of the Private Securities Litigation Reform Act of 1995. Except for historical
information, the matters set forth in this release are forward-looking and
involve risk and uncertainty, including such factors, among others, the ability
to book and ship within the quarter, the demand for semiconductors generally and
the specific demand for the Company's products, production capacity constraints,
the timely introduction of new processes and products, and specifically the
qualification and start-up of the Company's new wafer fabrication facility, the
impact of competitive products and prices, unsettled conditions in the hard disk
drive market, and other risk factors described in the Company's filings with the
Securities and Exchange Commission.


Financial inquiries on BENCHMARQ Microelectronics, Inc:
- -------------------------------------------------------

Investor Relations
c/o Shelton Associates, Inc.
Galleria Tower 1 
13355 Noel Road, Suite 1345, LB83 
Dallas, TX 75240 
FAX: 972-774-4577 
TEL: 972-239-5119
trademark: BENCHMARQ is a registered trademark of BENCHMARQ Microelectronics,
Inc.

                              (END)


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