LATTICE SEMICONDUCTOR CORP
DEF 14A, 1996-07-05
SEMICONDUCTORS & RELATED DEVICES
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<PAGE>
                            SCHEDULE 14A INFORMATION
 
                  Proxy Statement Pursuant to Section 14(a) of
            the Securities Exchange Act of 1934 (Amendment No.    )
 
    Filed by the Registrant /X/
    Filed by a Party other than the Registrant / /
 
    Check the appropriate box:
    / /  Preliminary Proxy Statement
    / /  Confidential, for Use of the Commission Only (as permitted by Rule
         14a-6(e)(2))
    /X/  Definitive Proxy Statement
    / /  Definitive Additional Materials
    / /  Soliciting  Material  Pursuant  to  Section  240.14a-11(c)  or  Section
         240.14a-12
 
                        Lattice Semiconductor Corporation
- - --------------------------------------------------------------------------------
                (Name of Registrant as Specified In Its Charter)
 
- - --------------------------------------------------------------------------------
    (Name of Person(s) Filing Proxy Statement, if other than the Registrant)
 
Payment of Filing Fee (Check the appropriate box):
 
/X/  $125 per  Exchange Act  Rules 0-11(c)(1)(ii),  14a-6(i)(1), 14a-6(i)(2)  or
     Item 22(a)(2) of Schedule 14A.
/ /  $500  per  each party  to  the controversy  pursuant  to Exchange  Act Rule
     14a-6(i)(3).
/ /  Fee  computed  on   table  below   per  Exchange   Act  Rules   14a-6(i)(4)
     and 0-11.
     1) Title of each class of securities to which transaction applies:
        ------------------------------------------------------------------------
     2) Aggregate number of securities to which transaction applies:
        ------------------------------------------------------------------------
     3) Per unit price or other underlying value of transaction computed
        pursuant to Exchange Act Rule 0-11 (Set forth the amount on which the
        filing fee is calculated and state how it was determined):
        ------------------------------------------------------------------------
     4) Proposed maximum aggregate value of transaction:
        ------------------------------------------------------------------------
     5) Total fee paid:
        ------------------------------------------------------------------------
/ /  Fee paid previously with preliminary materials.
/ /  Check box if any part of the fee is offset as provided by Exchange Act Rule
     0-11(a)(2)  and identify the  filing for which the  offsetting fee was paid
     previously. Identify the previous filing by registration statement  number,
     or the Form or Schedule and the date of its filing.
     1) Amount Previously Paid:
        ------------------------------------------------------------------------
     2) Form, Schedule or Registration Statement No.:
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     3) Filing Party:
        ------------------------------------------------------------------------
     4) Date Filed:
        ------------------------------------------------------------------------
<PAGE>
                          [LATTICE SEMICONDUCTOR LOGO]
 
July 8, 1996
Dear Stockholder:
 
    You  are cordially invited  to attend the  Lattice Semiconductor Corporation
1996 Annual Meeting of  Stockholders to be  held on Monday,  August 12, 1996  at
1:00 p.m. at the Embassy Suites Hotel located at 9000 SW Washington Square Road,
Tigard, Oregon.
 
    At  the Annual Meeting, in addition  to electing two directors and approving
the appointment of Price Waterhouse LLP as the Company's independent accountants
for this fiscal year, you will be  asked to approve a new Stock Incentive  Plan.
The  1996 Stock Incentive Plan,  adopted by the Board  of Directors in May 1996,
succeeds the nearly  depleted 1988 Stock  Incentive Plan (as  amended in  1992).
Under  the new  Plan, 2,000,000 additional  shares are reserved  for issuance to
employees.   In   addition,   certain   changes   have   been   made   regarding
performance-based measurements to ensure that the Plan complies with current tax
law regulations. In all other material respects the new Plan is identical to the
previous plan approved by stockholders.
 
    Increasing  the number  of shares available  for issuance  to employees will
enable the  Company  to  continue  its policy  of  encouraging  employee  equity
participation.  Your  Board  of  Directors  and  management  feel  strongly that
employee equity participation motivates high levels of performance, provides  an
effective  means of  recognizing contributions and  aligns the  interests of the
employees with those of the stockholders.  Stock options granted under the  Plan
are  also an essential and effective mechanism to attract talented technical and
management employees required to sustain the Company's growth.
 
    At the meeting we will also report on the Company's business and provide  an
opportunity  for you  to ask questions.  Whether or  not you plan  to attend the
meeting, please  sign and  return the  enclosed  proxy card  to ensure  you  are
represented.
 
Thank you,
Cyrus Y. Tsui
CHAIRMAN, PRESIDENT AND CHIEF EXECUTIVE OFFICER
<PAGE>
                          [LATTICE SEMICONDUCTOR LOGO]
 
                       LATTICE SEMICONDUCTOR CORPORATION
                              5555 NE MOORE COURT
                          HILLSBORO, OREGON 97124-6421
                            ------------------------
                    NOTICE OF ANNUAL MEETING OF STOCKHOLDERS
                                AUGUST 12, 1996
                            ------------------------
 
TO THE STOCKHOLDERS:
 
    NOTICE  IS HEREBY GIVEN  that the Annual Meeting  of Stockholders of Lattice
Semiconductor Corporation (the  "Company") will  be held at  the Embassy  Suites
Hotel, 9000 S.W. Washington Square Road, Tigard, OR 97223, on Monday, August 12,
1996, at 1:00 p.m., Pacific Time, for the following purposes:
 
    1.   To elect two Class I directors to  serve a term of three years or until
       their successors are elected;
 
    2.  To approve the Company's 1996 Stock Incentive Plan;
 
    3.   To  ratify the  appointment  of  Price Waterhouse  LLP  as  independent
       accountants of the Company for the fiscal year ending March 29, 1997; and
 
    4.   To transact such other business as may properly come before the meeting
       or any adjournment of the meeting.
 
    The foregoing  items of  business  are more  fully  described in  the  Proxy
Statement accompanying this Notice.
 
    Only  stockholders of record at  the close of business  on June 26, 1996 are
entitled to notice  of and to  vote at the  meeting. The meeting  is subject  to
adjournment  from time to time as the stockholders present in person or by proxy
may determine.
 
    All stockholders are invited to attend the meeting in person. WHETHER OR NOT
YOU PLAN TO ATTEND  THE MEETING, TO ASSURE  YOUR REPRESENTATION AT THE  MEETING,
PLEASE  PROMPTLY SIGN AND RETURN THE ACCOMPANYING  FORM OF PROXY IN THE ENCLOSED
RETURN ENVELOPE. Any  stockholder of record  attending the meeting  may vote  in
person even if he or she has returned a proxy.
 
                                          By Order of the Board of Directors
 
                                          Rodney F. Sloss
                                          SECRETARY
Hillsboro, Oregon
July 8, 1996
<PAGE>
                          [LATTICE SEMICONDUCTOR LOGO]
 
                       LATTICE SEMICONDUCTOR CORPORATION
 
                              5555 NE MOORE COURT
                          HILLSBORO, OREGON 97124-6421
                            ------------------------
               PROXY STATEMENT FOR ANNUAL MEETING OF STOCKHOLDERS
                             ---------------------
 
                 INFORMATION CONCERNING SOLICITATION AND VOTING
 
GENERAL
 
    A  proxy in the accompanying form is  solicited by the Board of Directors of
Lattice Semiconductor Corporation  (the "Company")  for use at  the 1996  Annual
Meeting  of Stockholders (the "Annual Meeting") to be held at the Embassy Suites
Hotel, 9000 S.W. Washington Square Road, Tigard, OR 97223, on Monday, August 12,
1996 at 1:00 p.m.,  Pacific Time, or  at any adjournment  thereof. The proxy  is
solicited  for the purposes set  forth herein and in  the accompanying Notice of
Annual Meeting of Stockholders. The Company's  mailing address is 5555 NE  Moore
Court, Hillsboro, Oregon 97124-6421, and its telephone number is (503) 681-0118.
 
    These  proxy solicitation  materials were mailed  on or about  July 8, 1996,
together  with  the  Company's  1996  Annual  Report  to  Stockholders,  to  all
stockholders entitled to vote at the meeting.
 
    The  power of  the proxy  holders will  be suspended  if the  stockholder of
record executing the  proxy is  present at  the meeting  and elects  to vote  in
person.  Any proxy may be  revoked prior to its  exercise upon written notice to
the Secretary of the Company or upon delivery to the Secretary of the Company of
a duly  executed proxy  bearing a  later date.  The shares  represented by  each
valid,  unrevoked  proxy  will  be voted  in  accordance  with  the instructions
specified in  the  proxy,  if given.  If  a  signed proxy  is  returned  without
instructions,  it will be voted for the  nominees for director, for the approval
of the proposals presented,  and in accordance with  the recommendations of  the
Board  of Directors  on any  other business which  may properly  come before the
meeting or matters incident to the conduct of the meeting.
 
    The Company's outstanding voting securities at the close of business on June
26, 1996 consisted  of 22,272,439  shares of Common  Stock, $.01  par value  per
share (the "Common Stock"), each of which is entitled to one vote on all matters
to  be presented  at the meeting.  Only stockholders  of record at  the close of
business on June 26, 1996 (the "record  date") are entitled to notice of and  to
vote  at the meeting or any adjournment  thereof. The Common Stock does not have
cumulative voting rights.
 
    The required quorum for the transaction of business at the Annual Meeting is
a majority of shares of Common Stock outstanding on the Record Date. Shares that
are voted "FOR", "AGAINST", "ABSTAIN" or "WITHHELD" from a matter are treated as
being present at the meeting for purposes of establishing a quorum and are  also
treated  as votes eligible to  be cast by the Common  Stock present in person or
represented by proxy at the Annual Meeting and "entitled to vote on the  subject
matter" (the "Votes Cast") with respect to such matter.
 
    "Abstentions"   and  votes  "withheld"  will  be  counted  for  purposes  of
determining both the  presence or  absence of a  quorum for  the transaction  of
business and the total number of Votes Cast with respect to a particular matter.
Broker  non-votes with  respect to proposals  set forth in  this Proxy Statement
will be counted only for  purposes of determining the  presence or absence of  a
quorum  and  will  not be  considered  "Votes  Cast", and  will  not  affect the
determination as  to whether  the  requisite majority  of  Votes Cast  has  been
obtained with respect to a particular matter.
<PAGE>
                       PROPOSAL 1: ELECTION OF DIRECTORS
 
DIRECTORS
 
    Pursuant  to the Company's Certificate of Incorporation (the "Certificate"),
the Board of Directors is divided into three classes. The directors are  elected
to  serve  staggered  three-year terms,  such  that  the term  of  one  class of
directors expires each year. Two classes consist of two directors, and one class
consists of one director. Two Class I directors are to be elected at the  Annual
Meeting  for a three-year term ending in  1999. The proxy holders intend to vote
the proxies  received by  them for  Mr. Merlo  and Mr.  Sonsini, who  have  been
nominated  to  the  Board of  Directors.  If  the nominees  for  director become
unavailable for election for any reason, pursuant to the proxy the proxy holders
will have discretionary authority to vote for suitable substitutes. The  Company
is  not aware of any reason that Mr. Merlo or Mr. Sonsini will be unable or will
decline to serve as a  director. The terms of office  of the persons elected  as
director will continue until their terms expire in 1999 or until successors have
been elected and qualified.
 
    The  following table briefly  describes the Company's  nominees for director
and the directors whose terms will continue. Except as otherwise noted, each has
held his  principal occupation  for at  least five  years. There  are no  family
relationships among any directors or officers of the Company.
 
<TABLE>
<CAPTION>
                                                                               DIRECTOR    TERM
NOMINEE               AGE     PRINCIPAL OCCUPATION AND OTHER DIRECTORSHIPS      SINCE     EXPIRES   CLASS
- - --------------------  ---  --------------------------------------------------  --------   -------   -----
<S>                   <C>  <C>                                                 <C>        <C>       <C>
Harry A. Merlo         71  President of Merlo Corporation, a holding company       1983      1996     I
                            (since August 1995); President and Chairman of
                            the Board of Louisiana Pacific Corporation, a
                            building materials company (until July 1995).
Larry W. Sonsini       55  Officer of and Chairman of the Executive Committee      1991      1996     I
                            of Wilson, Sonsini, Goodrich & Rosati, attorneys;
                            Director of Novell, Inc., Silicon Valley Group,
                            Inc., Pure Software, and Pixar Inc.
DIRECTORS WHOSE TERMS CONTINUE
Daniel S. Hauer        59  Chairman of the Board of S-MOS Systems, Inc., a         1987      1997    II
                            supplier of CMOS integrated circuits and silicon
                            wafers (since August 1994); President and Chief
                            Executive Officer of S-MOS Systems, Inc. (until
                            October 1994).
Douglas C. Strain      76  Vice Chairman and Founder of Electro Scientific         1986      1997    II
                            Industries, Inc., a manufacturer of industrial
                            lasers and electro-optical equipment.
Cyrus Y. Tsui          50  Chairman of the Board of the Company (effective         1988      1998    III
                            March 31, 1991); President and Chief Executive
                            Officer of the Company (since 1988); Director of
                            Asante Technologies.
</TABLE>
 
REQUIRED VOTE
 
    The  two nominees receiving  the highest number of  affirmative votes of the
Votes Cast at the Annual Meeting on this matter shall be elected as the Class  I
directors. See "Information Concerning Solicitation and Voting -- General".
 
    THE  BOARD OF DIRECTORS RECOMMENDS THAT THE STOCKHOLDERS VOTE "FOR" HARRY A.
MERLO AND LARRY W. SONSINI AS THE CLASS I DIRECTORS OF THE COMPANY.
 
                                       2
<PAGE>
BOARD MEETINGS AND COMMITTEES
 
    In fiscal  1996,  the  Company's  Board of  Directors  held  four  regularly
scheduled meetings and two special meetings. No member of the Board of Directors
attended  fewer than 75% of the total  number of board and committee meetings of
the Board of Directors held during fiscal 1996.
 
    The  Board  of  Directors  currently  has  three  standing  committees:  the
Compensation  Committee, the Audit  Committee and the  Nominating Committee. The
Compensation  Committee  makes  recommendations   to  the  Board  of   Directors
concerning  the salaries and other compensation  paid to the executive officers,
the granting of  employee stock options  and other compensation-related  issues.
Its members during fiscal 1996 were Mr. Strain and Mr. Sonsini. The Compensation
Committee  met twice in fiscal 1996. During  the May 13, 1996 Board Meeting, Mr.
Sonsini resigned from the Compensation Committee and was replaced by Mr. Merlo.
 
    The Audit  Committee  recommends  engagement of  the  Company's  independent
accountants  and is primarily responsible for  reviewing and approving the scope
of  the  audit  and  other  services  performed  by  the  Company's  independent
accountants and for reviewing and evaluating the Company's accounting principles
and  its systems of internal accounting controls. The Audit Committee meets with
management and the  Company's independent  accountants, who have  access to  the
Audit  Committee with  and without  the presence  of management representatives.
During fiscal 1996, the Audit Committee was composed of Mr. Merlo and Mr.  Hauer
and met twice.
 
    A  Nominating Committee comprising  Mr. Tsui exists  to identify persons for
future nomination for election to the Board of Directors. No meetings were  held
in  fiscal 1996  by the  Nominating Committee.  Stockholders who  wish to submit
names to the  Nominating Committee  for consideration  should do  so in  writing
addressed   to  the  Nominating  Committee,  c/o  Corporate  Secretary,  Lattice
Semiconductor Corporation, 5555 NE Moore Court, Hillsboro, Oregon 97124-6421.
 
DIRECTORS' COMPENSATION
 
    Directors who are employees of the Company (currently only Mr. Tsui) receive
no  additional  or   special  remuneration  for   serving  as  directors.   Each
non-employee  director receives  an annual retainer  of $12,000  plus $1,500 for
each board meeting attended and $750 for each committee meeting attended.
 
    Non-employee directors  also  receive  options to  purchase  shares  of  the
Company's  Common Stock. Prior to May 1993,  these options were issued under the
Company's Outside Directors Stock  Option Plan (the  "1990 Directors Plan").  In
August  1993, the stockholders approved the  1993 Outside Directors Stock Option
Plan (the "1993  Directors Plan") which  replaced the 1990  Directors Plan.  The
1993   Directors  Plan  provides  for  automatic  grants  of  stock  options  to
non-employee directors. Under this plan, each outside director received a  grant
of 18,000 shares in August 1993. In addition, each outside director will receive
a grant of 18,000 shares on the date any previously granted option becomes fully
vested. These shares generally vest quarterly over a four-year period.
 
TRANSACTIONS WITH MANAGEMENT
 
    Mr. Hauer, a director of the Company, is the Chairman of S-MOS Systems, Inc.
("S-MOS").  The  Company  has  a  manufacturing  agreement  with  S-MOS  for the
production and delivery of silicon  wafers. Wafer purchases under the  preceding
arrangement by the Company from S-MOS totalled $34.7 million for fiscal 1996. In
July  1994, the Company entered into an advance payment agreement and a research
and development agreement with Seiko Epson Corporation and its affiliate  S-MOS.
Pursuant  to the  terms of  these agreements, the  Company made  payments of $44
million to Seiko Epson, in approximately  even quarterly amounts from July  1994
to March 1995. Repayment will be made in the form of semiconductor wafers over a
multi-year period. In fiscal 1996, $10.7 million of wafers were delivered to the
Company in connection with these two agreements.
 
    Mr. Sonsini, a director of the Company, is an officer of and Chairman of the
Executive  Committee of Wilson, Sonsini, Goodrich &  Rosati, a law firm based in
Palo Alto, California. This firm serves  as the Company's primary outside  legal
counsel.
 
                                       3
<PAGE>
EMPLOYMENT AGREEMENTS
 
    In  September 1988, the  Company entered into an  employment letter with Mr.
Tsui pursuant to which Mr. Tsui serves as President and Chief Executive  Officer
of  the Company. In  addition to providing  for an annual  base salary and bonus
arrangements, the letter provides that  in the event of  a change in control  of
the  Company as described in  the letter, then any  unvested options to purchase
common stock  of  the  Company held  by  Mr.  Tsui shall  become  fully  vested.
Additionally,  in the event Mr. Tsui  is involuntarily terminated other than for
cause, the Company  will continue to  pay his salary  for up to  six months,  or
until Mr. Tsui begins employment elsewhere, whichever occurs sooner, and options
vesting during that period are exercisable.
 
COMPENSATION COMMITTEE INTERLOCKS AND INSIDER PARTICIPATION
 
    The members of the Compensation Committee during fiscal 1996 were Mr. Strain
and  Mr. Sonsini.  Both members  are non-employee  directors. Mr.  Sonsini is an
officer of and Chairman of  the Executive Committee of  the law firm of  Wilson,
Sonsini, Goodrich & Rosati, primary outside legal counsel to the Company.
 
REPORT OF THE COMPENSATION COMMITTEE
 
    The  Compensation  Committee  sets, reviews  and  administers  the executive
compensation program of the Company and  is comprised of the individuals  listed
below,  both of whom are non-employee directors  of the Company. The role of the
Compensation  Committee  is  to  establish   and  approve  salaries  and   other
compensation paid to the executive officers of the Company and to administer the
Company's  stock  option  plan,  in which  capacity  the  Compensation Committee
reviews and approves stock option grants to all employees.
 
    COMPENSATION PHILOSOPHY.   Lattice's  compensation philosophy  is that  cash
compensation  should be  directly linked  to the  short-term performance  of the
Company and  that  longer-term incentives,  such  as stock  options,  should  be
aligned  with the objective  of enhancing stockholder value  over the long term.
The use  of  stock options  clearly  links the  interests  of the  officers  and
employees  of the Company to the interests of the stockholders. In addition, the
Compensation Committee  believes that  the total  compensation package  must  be
competitive  with other companies in the industry to ensure that the Company can
continue to attract, retain and motivate  key employees who are critical to  the
long-term success of the Company.
 
    COMPONENTS  OF  EXECUTIVE COMPENSATION.   The  principal cash  components of
executive compensation  are  base  salary,  cash  bonuses  under  the  Executive
Incentive Plan and participation in the Company-wide Profit Sharing Plan.
 
    Base  salary is  set based  on competitive  factors and  the historic salary
structure  for  various  levels  of  responsibility  within  the  Company.   The
Compensation  Committee  periodically  conducts  surveys  of  companies  in  the
industry in order to determine whether the Company's executive base salaries are
in a competitive range. Generally, salaries are set at the middle to high end of
the range. In addition, the Company relies on variable compensation in order  to
emphasize  the importance of performance. As a  result, in the fiscal year ended
March 30, 1996, which was a profitable year for the Company, the salaries of the
named executive officers (as subsequently defined) comprised only 27% to 41%  of
their total cash compensation.
 
    The Executive Incentive Plan is a cash bonus plan that is linked directly to
the  profitability  of  the  Company. This  plan  in  particular  emphasizes the
Compensation Committee's  belief  that,  when the  Company  is  successful,  the
executives should be highly compensated, but that, conversely, if the Company is
not  successful  and  is  not  profitable,  no  bonuses  should  be  paid absent
extraordinary circumstances. Each individual executive officer's portion of  the
total  bonus pool is  determined by a  formula that is  based on the executive's
base salary and  his or her  contribution to  the Company. With  respect to  the
Chief  Executive Officer, the formula is based on his salary and the performance
of the Company. With respect to other executives, the bonus is based both on the
formula and on individual
 
                                       4
<PAGE>
performance relative to key objectives.  In addition to the Executive  Incentive
Plan,  the Company has a Profit Sharing  Plan under which a specified percentage
of operating profit is  set aside and distributed  equally among all  employees,
including executives.
 
    The principal equity component of executive compensation is the stock option
program. Stock options are generally granted when an executive joins the Company
and  on an  annual basis thereafter  under a replenishment  program. Options are
occasionally granted for promotions or  other special achievements. The  initial
option  granted to the executive vests over  a period of four years. The purpose
of the annual replenishment option grant program is to ensure that the executive
always has options that vest in increments over the following four-year  period.
This  provides  a  method  of  retention and  motivation  for  the  senior level
executives of the Company  and also aligns  senior management's objectives  with
long-term  stock price  appreciation. In addition  to the  stock option program,
executives are eligible  to participate  in a payroll  deduction employee  stock
purchase plan pursuant to which stock may be purchased at 85% of the fair market
value  at the  beginning or  end of  each offering  period (up  to a  maximum of
$25,000 worth of stock per calendar year or 10% of salary, whichever is less).
 
    The Board of  Directors has approved  a new stock  incentive plan which,  if
approved  by  the stockholders,  will  allow the  Company  to continue  to grant
certain stock-related benefits  and to utilize  additional tax deductions  which
may  be available  under Section  162(m) of the  Internal Revenue  Code of 1986.
Section 162(m) limits  to $1  million the deductibility  of annual  compensation
paid  by a public corporation  to the chief executive  officer and the next four
most  highly  compensated  executive   officers  unless  such  compensation   is
performance-based  within  the meaning  of  Section 162(m)  and  the regulations
thereunder.
 
    Other elements of executive compensation are participation in a Company-wide
life insurance  program  as  well  as a  supplemental  life  insurance  program,
long-term disability insurance, Company-wide medical benefits and the ability to
defer  compensation  pursuant  to  a 401(k)  plan  and  a  supplemental deferred
compensation plan. In fiscal  year 1996, the Company  did not make any  matching
contributions under the latter two plans.
 
                                          COMPENSATION COMMITTEE OF THE
                                          BOARD OF DIRECTORS
 
                                          Douglas C. Strain, Chairman
                                          Larry W. Sonsini
 
                                       5
<PAGE>
                             EXECUTIVE COMPENSATION
 
SUMMARY OF COMPENSATION
 
    The   following  table  provides   certain  summary  information  concerning
compensation paid to or  accrued for the Company's  Chief Executive Officer  and
each of the four other most highly compensated executive officers of the Company
(hereafter  referred to as the "named  executive officers") for the fiscal years
ended March 30, 1996, April 1, 1995, and April 2, 1994:
 
                           SUMMARY COMPENSATION TABLE
 
<TABLE>
<CAPTION>
                                                                                             LONG-TERM
                                                                                           COMPENSATION
                                                         ANNUAL COMPENSATION               -------------
                                             --------------------------------------------  STOCK OPTION
                                   FISCAL                                  OTHER ANNUAL       GRANTS        ALL OTHER
  NAME AND PRINCIPAL POSITION       YEAR     SALARY (1)     BONUS (2)    COMPENSATION (3)  (# OF SHARES)      COMP.
- - --------------------------------  ---------  -----------  -------------  ----------------  -------------  -------------
<S>                               <C>        <C>          <C>            <C>               <C>            <C>
Tsui, Cyrus Y.                         1996  $   402,505  $   1,082,983   $    10,885(4)      131,250     $   21,669(5)
 President & CEO                       1995      350,000        684,078         4,371          87,500         16,935(5)
                                       1994      290,400        537,843         3,586          87,500         20,175(5)
 
Laub, Steven A.                        1996  $   186,678  $     381,000   $     6,175          37,500     $    4,069(6)
 V.P. & General                        1995      174,164        270,812         4,371          25,000          2,550(6)
 Manager                               1994      162,273        236,526         3,586          25,000          3,695(6)
 
Yu, Kenneth K.                         1996  $   158,099  $     244,000   $     6,175          18,750     $      821(6)
 V.P. & Managing                       1995      147,855        148,874         4,371          10,000
 Director, Lattice Asia                1994      136,494        135,177         3,586          10,000            788(6)
 
Kollar, Paul T.                        1996  $   152,109  $     222,000   $     8,063(4)       18,750     $    7,340(6)
 V.P. -- Sales                         1995      146,368        155,000         4,371          12,500          5,000(6)
                                       1994      141,691        148,000         3,586          15,000          7,360(6)
 
Yu, Jonathan K.                        1996  $   151,474  $     221,000   $     7,847(4)       18,750     $   10,448(6)
 V.P. -- Operations                    1995      145,345        141,000         4,371          12,500          7,900(6)
                                       1994      140,112        137,000         3,586          15,000          7,900(6)
</TABLE>
 
- - ------------------------
 
(1) Salary includes amounts  deferred pursuant to  the Company's 401(k)  savings
    plan.
 
(2)  Bonuses for each year include amounts earned for such year, even if paid in
    the subsequent year,  and exclude bonuses  paid during such  year that  were
    earned for a prior year.
 
(3)  Unless otherwise  noted, represents  participation in  the Company's profit
    sharing plan.
 
(4) Includes tax payments by the Company related to non-cash compensation during
    fiscal 1996 in the amounts of $4,710,  $1,888, and $1,672 for Mr. Tsui,  Mr.
    Kollar, and Mr. Jonathan Yu, respectively,
 
(5)  Includes payments by the Company for  patent issuance, $300 in 1994, $2,900
    in 1995, and  $1,400 in  1996 and  by the  Company for  life and  disability
    insurance, $19,875 in 1994, $14,035 in 1995, and $20,269 in 1996.
 
(6) Represents payments by the Company for life and disability insurance.
 
                                       6
<PAGE>
OPTIONS GRANTED AND OPTIONS EXERCISED IN THE LAST FISCAL YEAR
 
    The  following tables set forth  information regarding stock options granted
to and exercised by the named executive officers during the last fiscal year, as
well as options held by the named executive officers as of March 30, 1996:
 
                       OPTION GRANTS IN LAST FISCAL YEAR
 
<TABLE>
<CAPTION>
                                                                                          POTENTIAL REALIZABLE VALUE
                                                                                          AT ASSUMED ANNUAL RATES OF
                                                     INDIVIDUAL GRANTS                     STOCK PRICE APPRECIATION
                                   -----------------------------------------------------  (THROUGH EXPIRATION DATE)
                                   OPTION GRANTS   % OF TOTAL     EXERCISE                --------------------------
                                       (# OF         OPTIONS        PRICE     EXPIRATION      5%            10%
   NAME AND PRINCIPAL POSITION       SHRS) (1)       GRANTED     ($/SHR) (1)     DATE     PER YEAR(2)  PER YEAR (2)
- - ---------------------------------  -------------  -------------  -----------  ----------  -----------  -------------
<S>                                <C>            <C>            <C>          <C>         <C>          <C>
Tsui, Cyrus Y.                          87,500          10.8%     $   31.63      8/14/00   $ 764,523   $   1,689,396
 President & CEO                        43,750           5.4%     $   36.50     11/14/00   $ 441,187   $     974,908
Laub, Steven A.                         25,000           3.1%     $   31.63      8/14/00   $ 218,435   $     482,684
 V.P. & General Manager                 12,500           1.5%     $   36.50     11/14/00   $ 126,053   $     278,545
Yu, Kenneth K.                          12,500           1.5%     $   31.63      8/14/00   $ 109,218   $     241,342
 V.P. & Managing                         6,250           0.8%     $   36.50     11/14/00   $  63,027   $     139,273
 Director, Lattice Asia
Kollar, Paul T.                         12,500           1.5%     $   31.63      8/14/00   $ 109,218   $     241,342
 V.P. -- Sales                           6,250           0.8%     $   36.50     11/14/00   $  63,027   $     139,273
Yu, Jonathan K.                         12,500           1.5%     $   31.63      8/14/00   $ 109,218   $     241,342
 V.P. -- Operations                      6,250           0.8%     $   36.50     11/14/00   $  63,027   $     139,273
</TABLE>
 
- - ------------------------
 
(1) These options were granted under the Company's 1988 Stock Incentive Plan  in
    August  and November  1995, and  have an  exercise price  equal to  the fair
    market value of the Company's  Common Stock as of  the dates of the  grants.
    These  options vest quarterly over  a four year period  ending in August and
    November 1999, respectively.
 
(2) The 5% and 10%  assumed rates of appreciation are  mandated by the rules  of
    the  Securities and Exchange  Commission and do  not represent the Company's
    estimate or projection of future prices for its Common Stock.
 
     OPTION EXERCISES IN LAST FISCAL YEAR AND FISCAL YEAR-END OPTION VALUES
 
<TABLE>
<CAPTION>
                                                                NUMBER OF UNEXERCISED
                                                                OPTIONS AT FISCAL YEAR
                                                                         END             VALUE OF UNEXERCISED OPTIONS
                                     SHARES                    ------------------------       AT FISCAL YEAR END
                                  ACQUIRED ON       VALUE        VESTED      UNVESTED    ----------------------------
  NAME AND PRINCIPAL POSITION       EXERCISE      REALIZED     (# OF SHRS)  (# OF SHRS)   VESTED (1)    UNVESTED (1)
- - --------------------------------  ------------  -------------  -----------  -----------  -------------  -------------
<S>                               <C>           <C>            <C>          <C>          <C>            <C>
Tsui, Cyrus Y.                        193,125   $   5,344,970     161,326      276,174   $   1,619,207  $   1,776,450
 President & CEO
Laub, Steven A.                        43,750   $   1,110,302      55,468       69,532   $     616,896  $     353,291
 V.P. & General Manager
Yu, Kenneth K.                         30,000   $     750,928      18,827       38,673   $     228,203  $     264,728
 V.P. & Managing
 Director, Lattice Asia
Kollar, Paul T.                        26,250   $     747,391      46,951       40,549   $     737,500  $     258,843
 V.P. -- Sales
Yu, Jonathan K.                             0   $           0      73,451       31,174   $   1,165,919  $     104,577
 V.P. -- Operations
</TABLE>
 
- - ------------------------
 
(1) Represents the difference between the exercise price of the options and  the
    closing price of the Company's stock on March 30, 1996.
 
                                       7
<PAGE>
               COMPARISON OF TOTAL CUMULATIVE STOCKHOLDER RETURN
 
    The  following graph sets  forth the Company's  total cumulative stockholder
return as compared to the  S&P 500 Index and the  S&P High Technology Index  for
the  period November 8, 1989 (the date  of the Company's initial public offering
("IPO")) through  March 29,  1996.  The total  stockholder return  assumes  $100
invested  at the beginning of the period in Common Stock of the Company, the S&P
500, and the S&P High Technology Index. Historic stock price performance is  not
necessarily indicative of future stock price performance.
 
EDGAR REPRESENTATION OF DATA POINTS USED IN PRINTED GRAPHIC
 
<TABLE>
<CAPTION>
                                  1989 (IPO)       1990       1991       1992       1993       1994       1995       1996
<S>                              <C>          <C>        <C>        <C>        <C>        <C>        <C>        <C>
LATTICE SEMICONDUCTOR                    100        187        163        258        460        401        616        712
S&P HIGH TECH COMPOSITE                  100        104        114        116        128        150        190        258
S&P 500                                  100        101        116        129        148        151        174        230
</TABLE>
 
    All data points are at March 31 except 1989, which is October 31 for the S&P
indexes and November 8 for the Company's Common Stock.
 
                                       8
<PAGE>
         SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT
 
    The  following table sets forth, as of  June 26, 1996, information about (i)
persons known to  the Company  to be  the beneficial  owners of  more than  five
percent  of the Company's outstanding Common Stock, (ii) each director and named
executive officer and (iii) all directors and executive officers as a group:
 
<TABLE>
<CAPTION>
                                                                                                   NUMBER OF        PERCENT OF
                                       BENEFICIAL OWNER                                           SHARES (1)          CLASS
- - -----------------------------------------------------------------------------------------------  -------------      ----------
<S>                                                                                              <C>                <C>
J. & W. Seligman & Co., Inc.                                                                     2,739,432(2)           12.3%
100 Park Avenue
New York, NY 10017
 
State Farm Mutual Automobile Insurance Company                                                   1,625,000(2)            7.3%
One State Farm Plaza
Bloomington, IL 61710
 
AIM Management Group Inc.                                                                        1,304,500(2)            5.9%
11 Greenway Plaza
Houston TX 77046
 
Cyrus Y. Tsui, Chairman of the Board,                                                              709,000(3)            3.1%
President and Chief Executive Officer
 
Steven A. Laub, Vice President                                                                     104,196(4)         *
and General Manager
 
Kenneth K. Yu, Vice President                                                                       70,000(5)         *
and Managing Director, Lattice Asia
 
Paul T. Kollar, Vice President -- Sales                                                             94,740(6)         *
 
Jonathan K. Yu, Vice President -- Operations                                                       106,457(7)         *
 
Daniel S. Hauer, Director                                                                           33,525(8)         *
 
Harry A. Merlo, Director                                                                            37,925(9)         *
 
Larry W. Sonsini, Director                                                                          22,577(10)        *
 
Douglas C. Strain, Director                                                                         46,000(11)        *
 
All directors and executive officers as a group (12 persons)                                     1,425,472(12)           6.1%
</TABLE>
 
- - ------------------------
 *  Less than one percent.
 
 (1) Unless otherwise indicated, the named beneficial owner has sole voting  and
    investment  power with respect to the  shares, subject to community property
    laws where applicable.
 
 (2) Based upon information received from  the named beneficial owner as of  May
    31,  1996 and on Schedule  13G filings under the  Securities Exchange Act of
    1934, as amended.
 
 (3) Includes 437,500 shares issuable upon exercise of options.
 
 (4) Includes 100,000 shares issuable upon exercise of options.
 
 (5) Includes 57,500 shares issuable upon exercise of options.
 
 (6) Includes 65,000 shares issuable upon exercise of options.
 
 (7) Includes 104,625 shares issuable upon exercise of options.
 
 (8) Includes 11,250 shares issuable upon exercise of options.
 
                                       9
<PAGE>
 (9) Excludes  an  aggregate  of  20,765  shares held  by  the  Harry  A.  Merlo
    Charitable  Remainder  Trust and  the  Domenic W.  Merlo  Educational Trust;
    includes 25,875 shares issuable upon exercise of options.
 
(10) Includes 22,125 shares issuable upon exercise of options.
 
(11) Includes 28,125 shares issuable upon exercise of options.
 
(12) Includes 1,042,750 shares issuable upon exercise of options.
 
COMPLIANCE WITH SECTION 16(a) OF THE EXCHANGE ACT
 
    Section 16(a) of the Securities Exchange  Act of 1934, as amended,  requires
the  Company's officers and  directors, and persons  who own more  than 10% of a
registered class  of  the  Company's  equity  securities,  to  file  reports  of
ownership  on Form  3 and  changes in  ownership on  Form 4  or Form  5 with the
Securities and Exchange  Commission ("SEC").  Such officers,  directors and  10%
stockholders  are also required by SEC rules  to furnish the Company with copies
of all Section 16(a) forms they file.  Based solely on its review of the  copies
of  such forms received by it, or written representations from certain reporting
persons, the Company believes that, during the fiscal year ended March 30, 1996,
all Section 16(a) filing requirements applicable to its officers, directors  and
10% stockholders were complied with.
 
               PROPOSAL 2: ADOPTION OF 1996 STOCK INCENTIVE PLAN
 
    A total of 5,775,000 shares of Common Stock were reserved for issuance under
the  1988  Stock Incentive  Plan  (as amended  in 1992).  As  of June  26, 1996,
3,251,829 shares  have been  issued, options  to purchase  2,101,691 shares  are
outstanding under the plan and 421,480 shares remain available for future grants
(without  the effect  of the  new 1996  Stock Incentive  Plan being  proposed to
stockholders for approval at the Annual Meeting).
 
1996 STOCK INCENTIVE PLAN PROPOSAL
 
    The 1996 Stock  Incentive Plan  (the "Incentive  Plan") was  adopted by  the
Board  of  Directors in  May  1996, subject  to  the approval  of  the Company's
stockholders. A  total of  2,000,000 shares  of Common  Stock are  reserved  for
issuance  under  the  Incentive  Plan  for the  grant  of  stock  options, stock
appreciation rights, stock bonus awards, restricted stock awards and cash  bonus
rights.  The Board of Directors believes  that the availability of stock options
is  an  important  factor  in  the  Company's  ability  to  attract  and  retain
experienced  key employees and to provide incentives for such employees to exert
their best efforts for the Company and its stockholders. Currently, the Board of
Directors grants options  under the  Company's 1988 Stock  Incentive Plan  which
will  expire in 1998. Except for the  number of shares reserved for issuance and
terms relating to 162(m) of the Internal  Revenue Code of 1986, as amended  (the
"Code"),  the Incentive Plan is substantially  unchanged from the Company's 1988
Stock Incentive Plan. The Board of  Directors has adopted the Incentive Plan  to
enable the Company to continue to provide stock incentives to its employees.
 
    A  copy  of the  Incentive  Plan is  attached as  Appendix  A to  this Proxy
Statement.
 
DESCRIPTION OF INCENTIVE PLAN
 
    ELIGIBILITY.  All permanent employees  of the Company and its  subsidiaries,
including  employees who are officers or  directors, are eligible to participate
in the Incentive Plan.
 
    ADMINISTRATION.   The  Incentive  Plan  is  administered  by  the  Board  of
Directors.  The  Board of  Directors may  delegate  authority to  administer the
Incentive Plan to a  committee of the  Board of Directors  consisting of two  or
more  directors.  The Board  of Directors,  or  such committee  of the  Board of
Directors with authority to administer the Incentive Plan, shall hereinafter  be
referred to as the "Administrator".
 
                                       10
<PAGE>
    TERM  OF PLAN.   The Incentive  Plan became  effective in May  1996 and will
continue until options have been exercised and shares have been awarded or  sold
and  are free of restrictions  with respect to all  shares reserved. However, no
incentive stock option may be granted under  the Incentive Plan on or after  the
tenth  anniversary of the  Incentive Plan's adoption by  the Board of Directors.
The Administrator has  the power to  terminate the Incentive  Plan at any  time,
except  with  respect  to  options  or  stock  subject  to  restrictions already
outstanding.
 
    AMENDMENT.  The Board of Directors may amend or modify the Incentive Plan at
any  time  without  approval  of  the  stockholders;  provided,  however,   that
stockholder  approval is  required for any  amendment which  increases the total
number of shares that may  be awarded or purchased  under the Incentive Plan  or
otherwise  changes  the  Plan  so  as  to  require  stockholder  approval  under
applicable law. No amendment or modification may change or modify any option  or
award already granted without the consent of the holder of such option or award.
 
    CHANGE OF CONTROL.  If the outstanding shares of Common Stock of the Company
are  increased or decreased or changed into  or exchanged for a different number
or kind  of  shares  or  other  securities of  the  Company  by  reason  of  any
reorganization, merger, consolidation, stock split, stock dividend or otherwise,
the  Administrator may  make appropriate  adjustment in  the number  and kind of
shares for which grants, sales and awards may be made under the Plan and in  the
number and kind of shares as to which outstanding grants, sales and awards shall
be  exercisable.  In the  event of  a dissolution  of the  Company or  a merger,
consolidation or plan of exchange  affecting the Company, the Administrator  may
in  its discretion  provide that  prior to such  event, optionees  will have the
right to exercise options without any limitation on exercisability.
 
    STOCK OPTIONS.  The Administrator determines the persons to whom options are
granted, the option price, the  number of shares to  be covered by each  option,
the  period of each option, the times at which options may be exercised, whether
the option is an incentive stock option  or a nonstatutory option and the  other
terms applicable to each option. If the option is an incentive stock option, the
option  price cannot be less  than the fair market value  of the Common Stock on
the date of grant and  the option may not be  exercised after the expiration  of
ten  years from the date  of grant. If an  optionee receiving an incentive stock
option at the time of grant owns stock representing more than 10 percent of  the
combined  voting power of the Company, (i) the option price may not be less than
110 percent of the fair  market value of the Common  Stock on the date of  grant
and  (ii) such option may not be  exercisable after the expiration of five years
from the date  of grant.  To the  extent that  the aggregate  fair market  value
(determined  as  of  the date  of  grant) of  the  stock with  respect  to which
incentive stock options become exercisable for the first time by an employee  in
any  calendar  year  exceeds  $100,000,  such  excess  shall  be  treated  as  a
nonstatutory stock option.  If the option  is a nonstatutory  stock option,  the
option  price may not  be less than 50  percent of the fair  market value of the
Common Stock on the  date of the  grant. Nonstatutory stock  options may not  be
exercised  after 10  years and seven  days from  the date of  grant. No monetary
consideration is paid to the Company upon the granting of options.
 
    Options  are  nontransferable  except  on  death  of  the  holder,  and  are
exercisable  in accordance with the terms of an option agreement entered into at
the time of  the grant  between the  Company and  the optionee.  Options may  be
exercised  only while an optionee is employed  by the Company or a subsidiary or
(i) within 12 months following termination  of employment by reason of death  or
disability  or (ii) within the time specified in the optionee's option agreement
following termination  for  any other  reason.  The purchase  price  for  shares
purchased  pursuant to exercise  of options must  be paid in  cash, a promissory
note, cashless exercise,  in shares of  Common Stock, which  shares if  acquired
directly  from  the Company  have been  held by  the optionee  for at  least six
months, or, with the consent of the Administrator, held for a lesser period,  or
in  a combination of cash and Common  Stock, as determined by the Administrator.
With the consent of  the Administrator, an optionee  may request the Company  to
automatically  apply the shares  received upon the  exercise of a  portion of an
option (even though stock certificates have not yet been issued) to satisfy  the
exercise price for additional portions of the option.
 
                                       11
<PAGE>
    Section  162(m) of the Code limits the deductibility of compensation paid to
certain executive officers of the Company. To maximize the Company's ability  to
deduct  compensation attributable to  options or SARs  (as described and defined
below) granted to such persons, the Incentive Plan provides that no employee may
be granted, in any fiscal year of the Company, options or SARs to purchase  more
than  500,000 shares of Common Stock, provided, however, that in connection with
an employee's initial employment, he  or she may be  granted options or SARs  to
purchase up to an additional 500,000 shares of Common Stock.
 
    STOCK  APPRECIATION  RIGHTS.    Stock appreciation  rights  ("SARs")  may be
granted under  the  Incentive Plan,  subject  to  the terms  prescribed  by  the
Administrator.  SARs may, but need not, be  granted in connection with an option
grant or an outstanding  option previously granted under  the Incentive Plan.  A
SAR gives the holder the right to payment from the Company of an amount equal in
value  to the excess of the fair market value  of a share of Common Stock of the
Company on the date of exercise over its fair market value on the date of grant,
or if granted in connection with an option, the option price per share under the
option to which  the SAR  is related.  A SAR is  exercisable only  at the  times
established  by the  Administrator. If  a SAR is  granted in  connection with an
option, it is exercisable only to the extent and on the same conditions that the
related option is exercisable. If a SAR is granted independent of an option,  it
is  not exercisable later than ten years and  seven days from the date of grant.
Payment by the Company upon  exercise of a SAR may  be made in shares of  Common
Stock,  in cash,  or partly  in shares of  Common Stock  and partly  in cash, as
determined by the Administrator. The Administrator may withdraw any SAR  granted
under  the Incentive  Plan at any  time and  may impose any  conditions upon the
exercise of a SAR or  adopt rules affecting the rights  of holders of SARs.  The
existence  of SARs, as well as certain bonus rights described below, may require
charges to income for accounting purposes (typically recognized over the life of
the right) based upon the amount of appreciation, if any, in the market value of
the Common Stock  over the exercise  price of  shares subject to  SARs or  bonus
rights.
 
    STOCK  BONUS AWARDS.  The Administrator  may award Common Stock to employees
as a stock bonus under the Incentive Plan. The Administrator will determine  the
employees  to receive awards, the number of shares to be awarded and the time of
the award. Stock received as a stock  bonus is subject to the terms,  conditions
and  restrictions  determined by  the  Administrator at  the  time the  stock is
awarded.
 
    RESTRICTED STOCK.  The  Incentive Plan provides that  the Company may  issue
restricted  stock to employees in such  amounts, for such consideration, subject
to such restrictions and  on such terms as  the Administrator may determine.  No
restricted  stock may be  issued for consideration  less than 50  percent of the
fair market value of the  Common Stock at the time  of issuance, nor may any  of
the issued restricted shares become freely transferable or free from restriction
within  six months  of the date  the restricted  stock is issued.  All shares of
restricted stock issued under the Incentive  Plan will be subject to a  purchase
agreement between the Company and the recipient of the restricted stock.
 
    CASH  BONUS  RIGHTS.   The  Administrator  may  grant cash  bonus  rights in
connection with option  grants, bonus  stock awards and  restricted stock  sales
under  the Incentive Plan. Bonus rights may be used to provide cash to employees
for the payment  of taxes in  connection with awards  under the Incentive  Plan.
Bonus  rights granted in connection with options  entitle the optionee to a cash
bonus if and when  the related option is  exercised or terminates in  connection
with the exercise of a SAR related to the option. If the shares are purchased on
the  exercise of an option,  the amount of the bonus  is equal to the difference
between the aggregate  exercise price  of the  surrendered option  and the  fair
market value of shares subject to the option on the exercise date, multiplied by
a bonus percentage determined by the Administrator, not to exceed 40 percent. If
an  optionee exercises a  related SAR in  connection with the  termination of an
option, the bonus  amount is  determined by  multiplying the  total fair  market
value of the shares and cash received upon exercise of the SAR by the applicable
bonus  percentage, not to exceed 40  percent. Bonus rights granted in connection
with stock  bonuses  entitle  the  recipient  to a  cash  bonus,  in  an  amount
determined  by the Administrator,  at the time  the stock is  awarded or at such
time as  any restrictions  to which  the stock  is subject  lapse. Bonus  rights
granted in
 
                                       12
<PAGE>
connection with restricted stock purchases entitle the recipient to a cash bonus
in an amount determined by the Administrator. Bonus rights granted in connection
with  restricted stock  purchases or stock  bonuses terminate in  the event that
restricted stock  is repurchased  by  the Company  or  forfeited by  the  holder
pursuant to the restrictions.
 
    As  mentioned above, Section 162(m) of  the Code limits the deductibility of
compensation paid to certain executive officers of the Company. To preserve  the
deductibility  of compensation  attributable to  stock bonus  awards, restricted
stock sales and cash bonus rights,  the Administrator has the discretion to  set
performance  goals which, depending on  the extent to which  they are met during
the applicable period, shall  determine the number or  value of the SARs,  stock
bonus awards, sales of restricted stock or cash bonus rights that may be granted
to  the participants. The performance goals applicable to a grant, sale or award
shall provide for a targeted level or levels of achievement by the Company based
on  any  or  all  of  the  following  for  the  performance  period:   corporate
profitability;  growth in sales; growth in income; share price appreciation; and
return on investment.  Further, the  maximum value  of all  stock bonus  awards,
restricted stock sales or cash bonus rights that an individual may receive for a
fiscal year is 2.5% of operating profit for such fiscal year.
 
TAX CONSEQUENCES
 
    Certain  options  authorized  to be  granted  under the  Incentive  Plan are
intended to  qualify  as  "incentive  stock  options"  for  federal  income  tax
purposes.  Under federal income  tax law currently in  effect, the optionee will
recognize no  income upon  grant  or exercise  of  the incentive  stock  option;
however,  the  amount by  which  the fair  market  value of  shares  issued upon
exercise of an incentive stock option exceeds the option price is an item of tax
preference to the optionee  for purposes of the  alternative minimum tax. If  an
optionee  exercises an incentive stock option and does not dispose of any of the
option shares within two years following the  date of grant and within one  year
following  the  date  of  exercise,  then  any  gain  realized  upon  subsequent
disposition will be  treated as long-term  capital gain for  federal income  tax
purposes.  If  an  optionee disposes  of  shares  acquired upon  exercise  of an
incentive stock  option before  the expiration  of either  the one-year  holding
period  or the two-year waiting period, any  amount realized will be taxable for
federal income tax purposes as ordinary income in the year of such disqualifying
disposition to the extent that the lesser of the fair market value of the shares
on the exercise  date or  the fair market  value of  the shares on  the date  of
disposition  exceeds the  exercise price.  The Company  will not  be allowed any
deduction for federal income  tax purposes at  either the time  of the grant  or
exercise  of an incentive stock option. Upon any disqualifying disposition by an
optionee, the Company will be entitled to a deduction to the extent the optionee
realizes income.
 
    Certain options authorized to  be granted under the  Incentive Plan will  be
treated  as non-statutory stock  options for federal  income tax purposes. Under
federal income tax law currently in effect, no income is realized by the grantee
of a nonstatutory stock option pursuant  to the Incentive Plan until the  option
is  exercised.  At the  time of  exercise  of a  nonstatutory stock  option, the
optionee will realize  ordinary income, and  the Company will  be entitled to  a
deduction, in the amount by which the fair market value of the shares subject to
the  option at the time of exercise exceeds the exercise price. Upon the sale of
shares acquired upon exercise of a nonstatutory stock option, the excess of  the
amount  realized from the sale over the market  value for the shares on the date
of exercise will be taxable as long or short term capital gain, depending on the
holding period.
 
    An employee  who  receives  stock  in connection  with  the  performance  of
services will generally realize taxable income at the time of receipt unless the
shares  are  substantially nonvested  for purposes  of Section  83 of  the Code.
Absent an election under Section  83(b), an employee who receives  substantially
nonvested  shares under  the Incentive Plan  will realize taxable  income as and
when the  shares substantially  vest. The  Company  will be  entitled to  a  tax
deduction  in the  amount includible as  income by  the employee at  the time or
times the employee recognizes income with respect to the
 
                                       13
<PAGE>
shares. A participant who receives a cash payment under the Incentive Plan  will
generally  recognize income equal to the amount of the payment when such payment
is received, and the Company will generally be entitled to a deduction equal  to
the income recognized by the participant.
 
REQUIRED VOTE
 
    The  proposal  to ratify  the adoption  of the  Incentive Plan  requires the
affirmative vote of a majority  of the Votes Cast on  this matter at the  Annual
Meeting. See "Information Concerning Solicitation and Voting -- General".
 
    THE  BOARD  OF DIRECTORS  RECOMMENDS THAT  THE  STOCKHOLDERS VOTE  "FOR" THE
RATIFICATION OF THE ADOPTION OF THE COMPANY'S 1996 STOCK INCENTIVE PLAN.
 
       PROPOSAL 3: RATIFICATION OF APPOINTMENT OF INDEPENDENT ACCOUNTANTS
 
    On May 13, 1996,  the Board of Directors  appointed Price Waterhouse LLP  to
act  as the independent  accountants of the  Company for the  fiscal year ending
March 29, 1997, subject to ratification of the appointment by the  stockholders.
Price Waterhouse LLP has served as the Company's independent accountants for the
last  nine  fiscal  years. Representatives  of  Price Waterhouse  LLP  have been
invited and  are  expected to  attend  the Annual  Meeting,  will be  given  the
opportunity  to make a statement if they wish  to do so and will be available to
respond to appropriate questions.
 
REQUIRED VOTE
 
    The proposal to ratify the appointment of Price Waterhouse LLP requires  the
affirmative  vote of a majority  of the Votes Cast on  this matter at the Annual
Meeting. See "Information Concerning Solicitation and Voting -- General". In the
event of a  negative vote on  such ratification, the  Board will reconsider  its
selection.
 
    THE  BOARD  OF DIRECTORS  RECOMMENDS THAT  THE  STOCKHOLDERS VOTE  "FOR" THE
RATIFICATION OF PRICE  WATERHOUSE LLP AS  THE COMPANY'S INDEPENDENT  ACCOUNTANTS
FOR THE FISCAL YEAR ENDING MARCH 29, 1997.
 
                                 ANNUAL REPORT
 
    The  Company's Annual Report to Stockholders for the fiscal year ended March
30, 1996 is transmitted herewith. The Company will furnish without charge,  upon
the written request of any person who was a stockholder or a beneficial owner of
Common Stock of the Company at the close of business on June 26, 1996, a copy of
the  Company's Annual Report on Form 10-K filed with the Securities and Exchange
Commission for  its  most  recent fiscal  year,  including  financial  statement
schedules  but  not  including  exhibits. Requests  should  be  directed  to the
attention of the Secretary of the Company at the address set forth in the Notice
of Annual Meeting immediately preceding this Proxy Statement.
 
                                 OTHER BUSINESS
 
    The Board of Directors does not intend to present any business for action at
the meeting other  than the election  of directors and  the proposals set  forth
herein,  nor does  it have knowledge  of any  matters which may  be presented by
others. If any other matter properly comes before the meeting, the persons named
in the accompanying form of  proxy intend to vote  the shares they represent  as
the Board of Directors may recommend.
 
                        METHOD AND COST OF SOLICITATION
 
    The cost of solicitation of proxies will be paid by the Company. In addition
to   solicitation  by  mail,  employees  of   the  Company,  for  no  additional
compensation, may  request the  return of  proxies personally  or by  telephone,
telecopy  or telegram. The Company will, on request, reimburse brokers and other
 
                                       14
<PAGE>
persons holding  shares  for  the  benefit  of  others  for  their  expenses  in
forwarding proxies and accompanying material and in obtaining authorization from
beneficial owners of the Company's stock to execute proxies.
 
                             STOCKHOLDER PROPOSALS
 
    A  stockholder proposal to be considered for inclusion in proxy material for
the Company's August 1997 Annual Meeting of Stockholders must be received by the
Company not later than March  10, 1997 in order that  it may be included in  the
Proxy Statement and form of proxy relating to that meeting.
 
    It  is important that your shares  be represented at the meeting, regardless
of the number of shares that you  hold. Therefore, whether or not you expect  to
be present at the meeting, please sign the accompanying form of proxy and return
it in the enclosed stamped return envelope.
 
                                          By Order of the Board of Directors
 
                                          Rodney F. Sloss
                                          SECRETARY
Hillsboro, Oregon
July 8, 1996
 
                                       15
<PAGE>
                                   APPENDIX A
                       LATTICE SEMICONDUCTOR CORPORATION
                           1996 STOCK INCENTIVE PLAN
 
    1.   PURPOSE.  The purpose of this 1996 Stock Incentive Plan (the "Plan") is
to enable  Lattice  Semiconductor Corporation  (the  "Company") to  attract  and
retain  experienced and  able employees and  to provide  additional incentive to
these  employees  to  exert  their  best   efforts  for  the  Company  and   its
stockholders.
 
    2.  SHARES SUBJECT TO THE PLAN.  Subject to adjustment as provided below and
in  paragraph 12, the stock to be offered under the Plan shall consist of shares
of the Company's Common Stock ("Stock"), and the number of shares of Stock  that
may  be  issued  pursuant to  this  Plan  shall not  exceed,  in  the aggregate,
2,000,000 shares. Such shares  may be authorized and  unissued shares or may  be
treasury  shares. If an option granted under  the Plan expires or terminates for
any reason without having been exercised in full, the unpurchased shares subject
to such option shall again be available under the Plan. If Stock sold or awarded
as a bonus  under the Plan  is forfeited to  the Company or  repurchased by  the
Company  at its original purchase price pursuant to applicable restrictions, the
number of shares  forfeited or repurchased  shall again be  available under  the
Plan;  PROVIDED, however, that,  Stock which has actually  been issued under the
Plan and is not  subject to a  repurchase right at  its original purchase  price
shall  not in any event  be returned to the Plan  and shall not become available
for future  distribution under  the Plan.  Stock issued  under the  Plan may  be
subject   to  such  restrictions   on  transfer,  repurchase   rights  or  other
restrictions as determined by the Board of Directors of the Company (the  "Board
of Directors").
 
    3.  EFFECTIVE DATE AND DURATION OF PLAN.
 
        (a)   EFFECTIVE DATE.   The Plan shall become  effective when adopted by
    the Board of Directors. Options may be  granted and Stock may be awarded  as
    bonuses  or sold  under the Plan  at any  time after the  effective date and
    before termination of the Plan.
 
        (b)   DURATION.    The Plan  shall  continue  in effect  until,  in  the
    aggregate,  options  and stock  appreciation  rights have  been  granted and
    exercised and Stock has been awarded as bonuses or sold and the restrictions
    on any such Stock  have lapsed on  all shares available  for the Plan  under
    paragraph  2  (subject to  any  adjustments under  paragraph  12); provided,
    however, that  unless  sooner  terminated  by the  Board  of  Directors,  no
    incentive  stock options shall be granted  on or after the tenth anniversary
    of the effective date. The Board  of Directors may suspend or terminate  the
    Plan  at any  time except with  respect to  options and to  Stock subject to
    restrictions then outstanding under the  Plan. Termination shall not  affect
    any  right  of the  Company to  repurchase shares  or the  forfeitability of
    shares issued under the Plan.
 
    4.  ADMINISTRATION.
 
        (a)  COMPOSITION OF ADMINISTRATOR.
 
           (i)   MULTIPLE ADMINISTRATIVE  BODIES.   If permitted  by Rule  16b-3
       promulgated  under the Securities  Exchange Act of  1934, as amended (the
       "Exchange Act") ("Rule 16b-3") and the legal requirements relating to the
       administration of stock  option plans under  applicable securities  laws,
       Delaware  corporate law and the Internal Revenue Code of 1986, as amended
       (the "Code")  ("Applicable  Laws"),  the  Plan  may  (but  need  not)  be
       administered  by  different  administrative bodies  with  respect  to (A)
       members of the Board  of Directors ("Directors")  who are employees,  (B)
       officers  who  are  not  Directors  and  (C)  employees  who  are neither
       Directors nor officers.
 
           (ii)  ADMINISTRATION WITH  RESPECT TO DIRECTORS  AND OFFICERS.   With
       respect  to grants,  awards and  sales to  eligible participants  who are
       officers or Directors of the Company,  the Plan shall be administered  by
       (A)   the   Board  of   Directors,  if   the   Board  of   Directors  may
 
                                      A-1
<PAGE>
       administer the Plan in compliance with Rule 16b-3 as it applies to a plan
       intended to qualify thereunder as a discretionary grant or award plan, or
       (B) a committee designated  by the Board of  Directors to administer  the
       Plan,  which committee shall  be constituted (1)  in such a  manner as to
       permit the  Plan to  comply  with Rule  16b-3 as  it  applies to  a  plan
       intended to qualify thereunder as a discretionary grant or award plan and
       (2) in such a manner as to satisfy the Applicable Laws.
 
           (iii)    ADMINISTRATION  WITH  RESPECT TO  GRANTS,  AWARDS  AND SALES
       INTENDED TO QUALIFY AS PERFORMANCE-BASED  COMPENSATION.  With respect  to
       grants,  awards and sales  to eligible participants  that are intended to
       qualify as "performance-based compensation" within the meaning of Section
       162(m) of  the  Code, the  Plan  shall  be administered  by  a  committee
       designated  by the Board  of Directors, which  committee shall consist of
       two or more members of the Board who are not employees of the Company and
       who otherwise  qualify  as  "outside directors"  within  the  meaning  of
       Section 162(m) of the Code.
 
           (iv)   ADMINISTRATION WITH RESPECT TO OTHER PERSONS.  With respect to
       grants, awards  and  sales  to  eligible  participants  who  are  neither
       Directors  nor officers of the Company, the Plan shall be administered by
       (A) the Board of Directors or (B) a committee designated by the Board  of
       Directors,  which committee shall  be constituted in such  a manner as to
       satisfy the Applicable Laws.
 
           (v)   GENERAL.   Once  a committee  has  been appointed  pursuant  to
       subsection  (ii)  or (iii)  of this  Section  4(a), such  Committee shall
       continue to serve in its designated capacity until otherwise directed  by
       the  Board of  Directors. From  time to time  the Board  of Directors may
       increase the  size  of  any  committee  and  appoint  additional  members
       thereof,  remove members (with or without  cause) and appoint new members
       in substitution therefor, fill vacancies (however caused) and remove  all
       members  of a committee and thereafter  directly administer the Plan, all
       to the extent  permitted by the  Applicable Laws  and, in the  case of  a
       committee  appointed under  subsection (ii),  to the  extent permitted by
       Rule 16b-3 as it applies  to a plan intended  to qualify thereunder as  a
       discretionary grant or award plan.
 
        (b)     POWERS  OF  THE  BOARD   OF  DIRECTORS  OR  ITS  COMMITTEE  (THE
    "ADMINISTRATOR").  Subject to the provisions of the Plan, and in the case of
    a committee,  subject to  the  specific duties  delegated  by the  Board  of
    Directors  to such committee, the Administrator shall have the authority, in
    its discretion:
 
           (i) to determine the fair market value of the Stock;
 
           (ii) to select the  employees and consultants  to whom grants,  sales
       and awards may be made hereunder;
 
          (iii)  to  determine  whether and  to  what extent  grants,  sales and
       awards, or any combination thereof, are made hereunder;
 
          (iv) to  determine the  number of  shares of  Stock to  be covered  by
       grants, sales and awards hereunder;
 
           (v) to approve forms of agreement for use under the Plan;
 
          (vi)  to determine the terms and conditions, not inconsistent with the
       terms of the Plan, of any grants, sales and awards hereunder. Such  terms
       and  conditions include, but are not  limited to, the exercise price, the
       time or times when grants, sales  and awards may be exercised (which  may
       be  based on performance criteria), any vesting acceleration or waiver of
       forfeiture restrictions, and any restriction or limitation regarding  any
       grant,  sale or award, or the shares  of Stock relating thereto, based in
       each case on such factors as  the Administrator, in its sole  discretion,
       shall determine;
 
          (vii) to construe and interpret the terms of the Plan;
 
                                      A-2
<PAGE>
         (viii)  to prescribe, amend and  rescind rules and regulations relating
       to the Plan;
 
          (ix) to determine whether and  under what circumstances grants,  sales
       and  awards may be settled  in cash instead of  Stock or Stock instead of
       cash;
 
           (x) to reduce the exercise price of any grants, sales and awards;
 
          (xi) subject to paragraph 14 of this Plan, to modify or amend  grants,
       sales  and awards, including the ability  to correct any defect or supply
       any omission or reconcile any inconsistency  in the Plan or in any  stock
       bonus, stock purchase or option agreement in the manner and to the extent
       it shall deem expedient to carry the Plan into effect;
 
          (xii)  to authorize any person to execute on behalf of the Company any
       instrument required to effect grants, sales and awards previously granted
       by the Administrator;
 
         (xiii) to determine  the terms and  restrictions applicable to  grants,
       sales and awards and any restricted Stock; and
 
         (xiv)  to make all  other determinations deemed  necessary or advisable
       for administering the Plan.
 
        (c)  EFFECT OF ADMINISTRATOR'S DECISION.  The Administrator's decisions,
    determinations and  interpretations  shall  be  final  and  binding  on  all
    optionees and any other holders of grants, sales and awards.
 
    5.  GRANTS, AWARDS AND SALES.
 
        (a)    TYPE OF  SECURITY.   The  Administrator may,  from time  to time,
    separately or in combination: (i) grant Incentive Stock Options, as  defined
    in  Section 422 of  the Code and  as provided in  paragraph 5(b); (ii) grant
    options other than Incentive  Stock Options ("Non-Statutory Stock  Options")
    as provided in paragraph 5(c); (iii) grant stock appreciation rights or cash
    bonus  rights as  provided in  paragraphs 10 and  11; (iv)  award bonuses of
    Stock as  provided  in  paragraph  5(d);  and  (v)  sell  Stock  subject  to
    restrictions  as provided in paragraph  5(e). The Administrator shall select
    the employees to whom awards shall be made. The Administrator shall  specify
    the  action taken with respect  to each person granted,  awarded or sold any
    option or Stock under the Plan and shall specifically designate each  option
    granted  under the Plan as an  Incentive Stock Option or Non-Statutory Stock
    Option.
 
        (b)  INCENTIVE STOCK OPTIONS.  Incentive Stock Options shall be  subject
    to the following terms and conditions:
 
           (i)  To the extent  that the aggregate  fair market value  of (a) the
       Stock with respect to which options designated as Incentive Stock Options
       plus (b) the shares  of stock of the  Company, any parent and  subsidiary
       with  respect to which other Incentive  Stock Options are exercisable for
       the first time by an optionee during any calendar year under all plans of
       the Company and any parent and subsidiary exceeds $100,000, such  options
       shall  be treated  as Non-Statutory  Stock Options.  For purposes  of the
       preceding sentence,  (a)  Incentive Stock  Options  shall be  taken  into
       account  in the order in which they were granted, and (b) the fair market
       value of the Stock shall be determined as of the time the Incentive Stock
       Option is granted.
 
           (ii) An Incentive Stock  Option may be granted  under the Plan to  an
       employee  possessing more  than 10 percent  of the  total combined voting
       power of  all  classes of  stock  of the  Company  or of  any  parent  or
       subsidiary  of  the Company  only if  the  option price  is at  least 110
       percent of the fair market  value of the Stock  subject to the option  on
       the date it is granted, as described in paragraph 5(b)(v), and the option
       by  its terms is not exercisable after  the expiration of five years from
       the date it is granted.
 
                                      A-3
<PAGE>
          (iii) Incentive Stock Options  may be granted under  the Plan only  to
       employees  of the  Company or  any parent  or subsidiary  of the Company,
       including employees who are directors. Except as provided in paragraph 8,
       no Incentive Stock Option granted under the Plan may be exercised  unless
       at  the time of such exercise the  optionee is employed by the Company or
       any parent or subsidiary of the  Company and shall have been so  employed
       continuously  since the date such option was granted. Absence on leave or
       on account  of  illness or  disability  under rules  established  by  the
       Administrator shall not, however, be deemed an interruption of employment
       for this purpose.
 
          (iv)  Subject to  paragraphs 5(b)(ii)  and 5(b)(iii),  Incentive Stock
       Options granted under the  Plan shall continue in  effect for the  period
       fixed  by the Administrator, except that  no Incentive Stock Option shall
       be exercisable  after the  expiration of  10 years  from the  date it  is
       granted.
 
           (v)   The  option  price  per  share   shall  be  determined  by  the
       Administrator at  the time  of  grant. Except  as provided  in  paragraph
       5(b)(ii), the option price shall not be less than 100 percent of the fair
       market  value of the shares covered by  the Incentive Stock Option at the
       date the option is granted. The fair market value of shares covered by an
       Incentive Stock Option shall be determined by the Administrator.
 
        (c)  NON-STATUTORY STOCK OPTIONS.  Non-Statutory Stock Options shall  be
    subject to the following terms and conditions:
 
           (i) Non-Statutory Stock Options granted under the Plan shall continue
       in  effect  for the  period fixed  by the  Administrator, except  that no
       Non-Statutory Stock Option shall be  exercisable after the expiration  of
       10 years plus 7 days from the date it is granted.
 
           (ii)   The  option  price  per  share  shall  be  determined  by  the
       Administrator at the time of grant. The option price may be more or  less
       than  or equal  to the  fair market  value of  the shares  covered by the
       Non-Statutory Stock Option  on the date  the option is  granted, and  the
       option   price  may  fluctuate  based   on  criteria  determined  by  the
       Administrator, provided that in no event and at no time shall the  option
       price  be less than 50 percent of the  fair market value of the shares on
       the date of  grant. The fair  market value  of shares covered  by a  Non-
       Statutory Stock Option shall be determined by the Administrator.
 
        (d)   STOCK  BONUS.  Stock  awarded as a  bonus shall be  subject to the
    terms, conditions, and restrictions determined  by the Administrator at  the
    time  the Stock  is awarded  as a bonus.  The Administrator  may require the
    recipient to sign  an agreement as  a condition  of the award,  but may  not
    require  the recipient to pay any  money consideration except as provided in
    this  paragraph.  The   agreement  may  contain   such  terms,   conditions,
    representations  and  warranties  as  the  Administrator  may  require.  The
    certificates representing  the  shares  of Stock  awarded  shall  bear  such
    legends as shall be determined by the Administrator.
 
        (e)   RESTRICTED  STOCK.   The Administrator  may issue  shares of Stock
    under the  Plan  for  such consideration  (including  promissory  notes  and
    services)  as  determined by  the Administrator  and with  such restrictions
    concerning transferability,  repurchase  by  the Company  or  forfeiture  as
    determined  by  the  Administrator,  provided that  in  no  event  shall the
    consideration be less than 50  percent of fair market  value at the time  of
    issuance,  nor shall any of the shares  issued hereunder be or become freely
    transferable or not subject  to such restrictions within  six months of  the
    date  such shares are  issued. All shares  of Stock issued  pursuant to this
    paragraph 5(e) shall  be subject  to a  Purchase Agreement,  which shall  be
    executed  by the Company and the prospective recipient of the Stock prior to
    the delivery of certificates representing such shares to the recipient.  The
    Purchase   Agreement   shall   contain  such   terms   and   conditions  and
    representations and  warranties  as  the Administrator  shall  require.  The
    certificates  representing such Stock shall  bear such legends as determined
    by the Administrator.
 
                                      A-4
<PAGE>
    6.  EXERCISE OF OPTIONS.  Except as provided in paragraphs 8 and 11, options
granted under the Plan may be exercised from time to time over the period stated
in each option in such amounts and at  such times as shall be prescribed by  the
Administrator,  provided  that options  shall  not be  exercised  for fractional
shares. Unless otherwise determined by  the Administrator, if the optionee  does
not exercise an option in any one year with respect to the full number of shares
to  which the optionee is entitled in  that year, the optionee's rights shall be
cumulative and the  optionee may purchase  those shares in  any subsequent  year
during the term of the option.
 
    7.  NONTRANSFERABILITY.
 
        (a)   OPTIONS AND AWARDS.  Each  option and award granted under the Plan
    by its terms  shall be  nonassignable and nontransferable  by the  optionee,
    either  voluntarily or by operation of law, except by will or by the laws of
    descent and distribution of the state or country of the optionee's  domicile
    at  the time  of death,  and each  option and  award by  its terms  shall be
    exercisable during the optionee's lifetime only by the optionee.
 
        (b)  STOCK.   Stock issued upon  exercise of an option  or awarded as  a
    bonus  or  sold under  the Plan  may  have, in  addition to  restrictions on
    transfer imposed  by law,  any restrictions  on transfer  determined by  the
    Administrator at the time the grant, sale or award is made.
 
    8.  TERMINATION OF EMPLOYMENT OR DEATH.
 
        (a)  If an  optionee's employment  by the  Company or  by any  parent or
    subsidiary of the  Company is terminated  by retirement or  for any  reason,
    voluntarily  or  involuntarily, with  or without  cause,  other than  in the
    circumstances specified in  paragraph 8(b)  below, any option  held by  such
    optionee  may be exercised at  any time prior to  its expiration date or the
    date  specified  by  the  Administrator  in  the  optionee's  option  grant,
    whichever  is the shorter period, but only if and to the extent the optionee
    was entitled to exercise the option on the date of such termination. Subject
    to such  terms  and  conditions  as the  Administrator  may  determine,  the
    Administrator  may extend the  exercise period any length  of time not later
    than the expiration date of the option  and may increase the portion of  the
    option  that may be exercised on termination, provided that any extension of
    the exercise  period of  an Incentive  Stock Option  shall be  subject to  a
    written  acknowledgment by the optionee  that the extension disqualifies the
    option as an Incentive Stock Option.
 
        (b) If  an optionee's  employment by  the Company  or by  any parent  or
    subsidiary  of  the  Company  is terminated  because  of  death  or physical
    disability (within the meaning of Section 22(e)(3) of the Code), the option,
    including portions  not  yet exercisable,  may  be exercised  prior  to  the
    earlier  of  the expiration  of  12 months  from the  date  of death  or the
    expiration of  the option.  If  an optionee's  employment is  terminated  by
    death,  any option  held by  the optionee shall  be exercisable  only by the
    person or persons  to whom such  optionee's rights under  such option  shall
    pass  by the optionee's will  or by the laws  of descent and distribution of
    the state  or country  of the  optionee's  domicile at  the time  of  death.
    Subject to such terms and conditions as the Administrator may determine, the
    Administrator  may extend the  exercise period any length  of time not later
    than the expiration date of the  option, provided that any extension of  the
    exercise  period of an Incentive Stock Option  shall be subject to a written
    acknowledgment by  the optionee  or the  optionee's personal  representative
    that the extension disqualifies the option as an Incentive Stock Option.
 
        (c)  To the  extent an option  held by  any deceased optionee  or by any
    optionee whose employment is terminated is not exercised within the  limited
    periods  provided above, all  further rights to  purchase shares pursuant to
    such option and all other related rights shall terminate at the end of  such
    periods.
 
    9.   PURCHASE  OF SHARES  PURSUANT TO  OPTION.   Shares may  be purchased or
acquired pursuant to an option granted under  the Plan only upon receipt by  the
Company  of notice in writing  from the optionee of  the optionee's intention to
exercise,   specifying    the   number    of   shares    as   to    which    the
 
                                      A-5
<PAGE>
optionee  desires to  exercise the  option and  the date  on which  the optionee
desires to complete the transaction, which shall not be more than 30 days  after
receipt of the notice, and unless in the opinion of counsel for the Company such
a  representation is not required in order  to comply with the Securities Act of
1933, as amended, containing a representation that it is the optionee's  present
intention  to  acquire  the  shares  for  investment  and  not  with  a  view to
distribution. On or before the date specified for completion of the purchase  of
shares  pursuant to an option, the optionee  must have paid the Company the full
purchase price of such shares in cash  (including cash that may be the  proceeds
of  a loan  from the Company),  in whole or  in part  in shares of  Stock of the
Company previously acquired  and, if  acquired directly or  indirectly from  the
Company,  held for at least six months by the optionee, unless the Administrator
consents to  accepting  Stock held  for  a lesser  period  of time.  Any  shares
surrendered  on payment  for the  exercise of  options shall  be valued  at fair
market value at  the time of  surrender as determined  by the Administrator.  No
shares  shall be  issued until  full payment  therefor has  been made.  With the
consent  of  the  Administrator   an  optionee  may   request  the  Company   to
automatically  apply the  shares received  upon the exercise  of a  portion of a
stock option  (even though  stock  certificates have  not  yet been  issued)  to
satisfy  the  exercise price  for additional  portions of  the option.  With the
consent of the  Administrator the  Company may allow  the exercise  price to  be
satisfied  by  delivery of  a such  documentation as  the Administrator  and any
broker approved  by the  Company,  if applicable,  shall  require to  effect  an
exercise  of the option and delivery to the Company of the sale or loan proceeds
required to pay the exercise price.
 
    10.  STOCK APPRECIATION RIGHTS.
 
        (a)  GRANT.  Stock appreciation rights may be granted under the Plan  by
    the  Administrator,  subject  to such  rules,  terms and  conditions  as the
    Administrator prescribes.
 
        (b)  EXERCISE.
 
           (i) A stock appreciation right shall be exercisable only at the  time
       or  times established by the Administrator. If a stock appreciation right
       is granted in  connection with an  option, then it  shall be  exercisable
       only  to the extent  and on the  same conditions that  the related option
       could be  exercised. Upon  exercise of  a stock  appreciation right,  any
       option  or portion thereof to which  the stock appreciation right relates
       must be  surrendered. Stock  appreciation rights  granted independent  of
       options shall expire not later than 10 years plus 7 days from the date of
       grant.
 
           (ii)  The  Administrator may  withdraw  any stock  appreciation right
       granted under the Plan at any time and may impose any conditions upon the
       exercise of a  stock appreciation  right or adopt  rules and  regulations
       from  time to time affecting the  rights of holders of stock appreciation
       rights. Such rules and regulations may govern the right to exercise stock
       appreciation rights granted  before adoption or  amendment or such  rules
       and regulations as well as stock appreciation rights granted thereafter.
 
          (iii)  Each stock  appreciation right  shall entitle  the holder, upon
       exercise, to  receive from  the Company  in exchange  therefor an  amount
       equal  in value  to the excess  of the fair  market value on  the date of
       exercise of one share of Stock of the Company over its fair market  value
       on  the date  of grant  (or, in  the case  of a  stock appreciation right
       granted in connection with  an option, the option  price per share  under
       the  option to which the stock appreciation right relates), multiplied by
       the number  of shares  covered by  the stock  appreciation right  or  the
       option,  or portion thereof,  that is surrendered.  No stock appreciation
       right shall be  exercisable at a  time that the  amount determined  under
       this  subparagraph is negative. Payment by the Company upon exercise of a
       stock appreciation right may be made  in Stock valued at its fair  market
       value,  in cash, or partly in Stock  and partly in cash, as determined by
       the Administrator.
 
          (iv) The fair market value of  the Stock shall be determined for  this
       purpose by the Administrator.
 
                                      A-6
<PAGE>
           (v)  No fractional  shares shall be  issued upon exercise  of a stock
       appreciation right. In lieu thereof cash  may be paid in an amount  equal
       to  the value of the fraction or, in the discretion of the Administrator,
       the number of shares may be rounded downward to the next whole share.
 
          (vi) Cash  payments of  stock appreciation  rights as  well as  Common
       Stock  issued upon exercise of stock appreciation rights shall be applied
       against the maximum number of shares  of Common Stock that may be  issued
       pursuant  to the Plan.  The number of  shares to be  applied against such
       maximum number of  shares in such  circumstances shall be  the number  of
       shares   subject  to  options  surrendered   upon  exercise  of  a  stock
       appreciation right  or  for  stock appreciation  rights  not  granted  in
       connection with an option, shares equal to the amount of the cash payment
       divided  by the fair market value of a  share of Common Stock on the date
       the stock appreciation right is granted.
 
    11.  CASH BONUS RIGHTS.
 
        (a)  GRANT.  The Administrator may grant bonus rights under the Plan  in
    connection  with (i)  an option  granted or  previously granted,  (ii) Stock
    awarded, or  previously  awarded,  as  a  bonus  and  (iii)  Stock  sold  or
    previously sold under the Plan. Bonus rights will be subject to rules, terms
    and conditions as the Administrator may prescribe.
 
        (b)   BONUS RIGHTS IN CONNECTION WITH OPTIONS.  A bonus right granted in
    connection with an option will entitle an optionee to a cash bonus when  the
    related  option is exercised (or terminates  in connection with the exercise
    of a stock appreciation right related to the option) in whole or in part, or
    at such other time as determined by the Administrator as the bonus right  is
    granted.  If an  optionee purchases shares  and does not  exercise a related
    stock appreciation right, then the amount  of the bonus shall be  determined
    by multiplying the excess of the total fair market value of the shares to be
    acquired  upon the exercise  over the total  option price for  shares by the
    applicable bonus percentage. If the  optionee is exercising a related  stock
    appreciation right in connection with the termination of an option, then the
    bonus  shall be determined by multiplying the total fair market value of the
    shares and cash received pursuant to the exercise of the stock  appreciation
    right  by  the  applicable  bonus  percentage.  For  the  purposes  of  this
    paragraph, the  fair market  value  of shares  shall  be determined  by  the
    Administrator.  The bonus  percentage applicable to  a bonus  right shall be
    determined from time  to time  by the Administrator  but shall  in no  event
    exceed  40 percent of the amount by which the fair market value of the Stock
    received on exercise of the related  option at the time of exercise  exceeds
    the option price of such option.
 
        (c)  BONUS RIGHTS IN CONNECTION WITH STOCK BONUS.  A bonus right granted
    in  connection with Stock awarded as a bonus will entitle the person awarded
    such Stock to a cash bonus at the time the Stock is awarded, at such time as
    restrictions, if any, to which the Stock is subject lapse, or at such  other
    time  as determined by the  Administrator as the bonus  right is granted. If
    Stock awarded is subject to restrictions  and is repurchased by the  Company
    or  forfeited by the holder the bonus  right granted in connection with such
    Stock shall terminate and may not be exercised. The amount of cash bonus  to
    be  awarded and the time  such cash bonus is to  be paid shall be determined
    from time to time by the Administrator.
 
        (d)  BONUS RIGHTS  IN CONNECTION WITH STOCK  PURCHASE.  The bonus  right
    granted  in  connection  with  Stock  purchased  hereunder  (excluding Stock
    purchased pursuant to an option) shall terminate and may not be exercised in
    the event the Stock is repurchased by the Company or forfeited by the holder
    pursuant to restrictions applicable to the  Stock. The amount of cash  bonus
    to be awarded and the time such cash bonus is to be paid shall be determined
    from time to time by the Administrator.
 
    12.   CHANGES IN CAPITAL  STRUCTURE.  If the  outstanding shares of Stock of
the Company are hereafter  increased or decreased or  changed into or  exchanged
for  a different number or kind of shares  or other securities of the Company by
reason   of    any    reorganization,    merger,    consolidation,    plan    of
 
                                      A-7
<PAGE>
exchange,  recapitalization,  reclassification, stock  split-up,  combination of
shares or dividend payable  in shares, appropriate adjustment  shall be made  by
the  Administrator in the number and kind  of shares for which grants, sales and
awards may be  made under the  Plan. In addition,  the Administrator shall  make
appropriate  adjustment in the number and kind of shares as to which outstanding
grants, sales  and  awards,  or  portions thereof  then  unexercised,  shall  be
exercisable.  Adjustments in outstanding options shall be made without change in
the total price applicable to the unexercised  portion of any option and with  a
corresponding  adjustment in  the option price  per share and  shall neither (i)
make the ratio, immediately after  the event, of the  option price per share  to
the  fair market value per share more  favorable to the optionee than that ratio
immediately before the event,  nor (ii) make  the aggregate spread,  immediately
after  the event, between the fair market value of shares as to which the option
is exercisable  and  the option  price  of such  shares  more favorable  to  the
optionee   than  that  aggregate  spread   immediately  before  the  event.  The
Administrator may  also require  that any  securities issued  in respect  of  or
exchanged  for Stock issued hereunder that is subject to restrictions be subject
to similar restrictions. Notwithstanding the foregoing, the Administrator  shall
have  no obligation to effect  any adjustment that would  or might result in the
issuance of  fractional shares,  and any  fractional shares  resulting from  any
adjustment  may be disregarded or  provided for in any  manner determined by the
Administrator.  Any  such  adjustment  made   by  the  Administrator  shall   be
conclusive.   In  the  event  of  dissolution   of  the  Company  or  a  merger,
consolidation or plan of  exchange affecting the Company,  in lieu of  providing
for  options as provided above  in this paragraph 12,  the Administrator may, in
its sole discretion, provide  a 30-day period prior  to such event during  which
optionees  shall have the right to exercise  options in whole or in part without
any limitation on exercisability.
 
    13.  CORPORATE MERGERS, ACQUISITIONS, ETC.  The Administrator may also grant
options and  stock appreciation  rights,  award Stock  bonuses and  issue  Stock
subject  to restrictions having terms, conditions  and provisions that vary from
those specified in this  Plan provided that any  options and stock  appreciation
rights  granted,  any  stock bonuses  awarded  and any  restricted  stock issued
pursuant to this section are granted  in substitution for or in connection  with
the  assumption of, existing  options, stock appreciation  rights, stock bonuses
and restricted  stock granted,  awarded  or issued  by another  corporation  and
assumed  or otherwise agreed to be provided for by the Company pursuant to or by
reason of a transaction involving a corporate merger consolidation,  acquisition
of  property or  stock, separation, reorganization  or liquidation  to which the
Company or a subsidiary is a party.
 
    14.  AMENDMENT OF  PLAN.  The Board  of Directors may at  any time and  from
time  to  time modify  or  amend the  Plan  in such  respects  as it  shall deem
advisable because of changes in the law while  the Plan is in effect or for  any
other  reason. Except as provided in paragraphs  8, 10 and 12, however no change
in an option already  granted or modification of  restrictions on Stock  already
issued shall be made without the written consent of the holder of such option or
Stock.  Furthermore, unless the  Company obtains stockholder  approval in such a
manner and degree as required by applicable law, no amendment or change shall be
made in the Plan that increases the  total number of shares that may be  awarded
or  purchased under  the Plan  or that  otherwise requires  stockholder approval
under applicable law.
 
    15.  APPROVALS.  The obligations of  the Company under the Plan are  subject
to  the approval of state and  federal authorities or agencies with jurisdiction
in the matter. The Company will use  its best efforts to take steps required  by
state  or federal law or applicable regulations, including rules and regulations
of the Securities and  Exchange Commission and any  stock exchange on which  the
Company's  shares may  then be  listed, in connection  any grant,  sale or award
hereunder, or  the  listing of  such  shares  of said  exchange.  The  foregoing
notwithstanding,  the Company shall not be  obligated to issue or deliver shares
of Common Stock under the  Plan if the Company is  advised by its legal  counsel
that  such  issuance  or  delivery would  violate  applicable  state  or federal
securities laws.
 
    16.  EMPLOYMENT RIGHTS.  Nothing in  the Plan, nor any grant, award or  sale
hereunder,  shall confer upon (i) any employee  any right to be continued in the
employment of the Company or any parent  or subsidiary of the Company, or  shall
interfere    in    any    way   with    the    right   of    the    Company   or
 
                                      A-8
<PAGE>
any parent or subsidiary  of the Company  by whom such  employee is employed  to
terminate  such  employee's employment  at  any time,  for  any reason,  with or
without cause, or to increase or decrease such employee's compensation, or  (ii)
any  person engaged by the  Company any right to be  retained or employed by the
Company or  to the  continuation,  extension, renewal,  or modification  of  any
compensation, contract, or arrangement with or by the Company.
 
    17.   RIGHTS AS  A STOCKHOLDER.  The  holder of an  option, the recipient of
Stock awarded as a  bonus or the purchaser  of Stock shall have  no rights as  a
stockholder with respect to any shares covered by any grant, sale or award until
the  date of issue of a stock certificate  to him or her for such shares. Except
as otherwise expressly  provided in the  Plan, no adjustment  shall be made  for
dividends  or other rights for  which the record date is  prior to the date such
stock certificate is issued.
 
    18.  STOCK WITHHOLDING TO SATISFY WITHHOLDING TAX OBLIGATIONS.
 
        (a)   ABILITY TO  USE STOCK  TO SATISFY  WITHHOLDING.   The Company  may
    require any recipient of a grant, sale or award under the Plan to pay to the
    Company  amounts necessary to satisfy any applicable federal, state or local
    tax withholding  requirements.  At  the  discretion  of  the  Administrator,
    optionees  and  award  recipients  may  satisfy  withholding  obligations as
    provided in this Section 18. When an optionee or award recipient incurs  tax
    liability  in connection with a grant, sale or award, which tax liability is
    subject to tax  withholding under  applicable tax  laws (including  federal,
    state  and  local  laws),  the  optionee  may  satisfy  the  withholding tax
    obligation (up to an amount  calculated by applying such optionee's  maximum
    marginal  tax rate) by electing to have  the Company withhold from the Stock
    to be  issued in  connection with  a grant,  sale or  award that  number  of
    shares,  or by  delivering to  the Company  that number  of previously owned
    shares (which, in the case of Stock acquired directly or indirectly from the
    Company, has been held for at least six months), having a fair market  value
    equal  to the amount required  to be withheld. The  fair market value of the
    shares to be withheld or delivered, as the case may be, shall be  determined
    on  the date that the  amount of tax to be  withheld is determined (the "Tax
    Date").
 
        (b)  ELECTION TO HAVE STOCK WITHHELD.   All elections by an optionee  to
    have  Stock withheld or to deliver  previously owned Shares pursuant to this
    Section  18  shall  be  made  in  writing  in  a  form  acceptable  to   the
    Administrator and shall be subject to the following restrictions:
 
           (i) the election must be made on or prior to the applicable Tax Date;
 
           (ii)  all elections shall be subject to the consent or disapproval of
       the Administrator; and
 
          (iii) if the optionee is subject to liability under Section 16 of  the
       Exchange  Act, the election must comply with the applicable provisions of
       Rule 16b-3  and  shall  be  subject  to  such  additional  conditions  or
       restrictions  as may  be required thereunder  to qualify  for the maximum
       exemption from  Section 16  of  the Exchange  Act  with respect  to  Plan
       transactions.
 
        (c)  SECTION 83(b) ELECTIONS.  In the event that (i) an election to have
    Shares  withheld is  made by  an optionee, (ii)  no election  is filed under
    Section 83(b)  of the  Code  by such  optionee and  (iii)  the Tax  Date  is
    deferred  under Section 83 of the Code,  the optionee shall receive the full
    number of shares subject to  the grant, sale or award,  as the case may  be,
    but  such optionee shall be unconditionally  obligated to tender back to the
    Company the proper number of shares on the Tax Date.
 
    19.  RULE 16b-3.  Grants, sales and awards to Insiders must comply with  the
applicable provisions of Rule 16b-3 and shall contain such additional conditions
or  restrictions  as  may be  required  thereunder  to qualify  for  the maximum
exemption from Section 16 of the Exchange Act with respect to Plan transactions.
 
    20.  PERFORMANCE-BASED COMPENSATION.
 
        (a)  OPTIONS AND STOCK  APPRECIATION RIGHTS.  The following  limitations
    shall  apply to grants of options and stock appreciation rights to employees
    of the Company.
 
                                      A-9
<PAGE>
           (i) No employee shall be granted, in any fiscal year of the  Company,
       options  or stock appreciation rights to purchase, in the aggregate, more
       than 500,000 shares of Stock.
 
           (ii) In connection with  his or her  initial employment, an  employee
       may  be granted options and stock appreciation rights to purchase, in the
       aggregate, up to an  additional 500,000 shares of  Stock which shall  not
       count against the limit set forth in subsection (i) above.
 
          (iii)  The foregoing limitations shall  be adjusted proportionately in
       connection with any change in  the Company's capitalization as  described
       in Section 12.
 
          (iv) If an option or stock appreciation right is cancelled in the same
       fiscal  year  of the  Company  in which  it  was granted  (other  than in
       connection with a  transaction described  in Section  12), the  cancelled
       option  will be counted  against the limits set  forth in subsections (i)
       and (ii) above. For this purpose, if  the exercise price of an option  is
       reduced,  the transaction will be treated as a cancellation of the option
       and the grant of a new option.
 
        (b)  OTHER GRANTS, AWARDS AND  SALES.  The Administrator shall have  the
    discretion  to set Performance Goals (as  defined below) which, depending on
    the extent to which they are  met during the Performance Period (as  defined
    below),  shall  determine the  number or  value of  grants, awards  or sales
    (excluding options)  that shall  be made  to Covered  Employees (as  defined
    below). The Performance Goals shall be set by the Administrator on or before
    the  latest date  permissible to  enable the awards  or sales  to qualify as
    "performance-based compensation" within the meaning of Section 162(m) of the
    Code. Each grant,  sale or  award pursuant to  this Section  20(b) shall  be
    evidenced  by an  agreement that shall  specify the  Performance Period, and
    such  other  terms  and  conditions  as  the  Administrator,  in  its   sole
    discretion,  shall  determine. To  the extent  necessary to  qualify grants,
    awards or sales  as "performance-based compensation"  within the meaning  of
    Section  162(m) of the Code, the Administrator shall certify in writing that
    the Performance  Goals applicable  to  such grant,  sale  or award  for  the
    relevant Performance Period have been satisfied. Notwithstanding anything to
    the  contrary contained herein, the maximum  value of all grants, awards, or
    sales pursuant to this  Section 20(b) that an  individual may receive for  a
    fiscal year is 2.5% of operating profit for such fiscal year.
 
        (c)    DEFINITIONS.   As used  herein,  the following  definitions shall
    apply:
 
           (i) "COVERED EMPLOYEE" means a "covered employee" within the  meaning
       of Section 162(m) of the Code.
 
           (ii)  "PERFORMANCE GOAL"  means the goal  or goals  determined by the
       Administrator, in  its discretion,  to be  applicable with  respect to  a
       grant   sale  or   award  intended   to  qualify   as  "performance-based
       compensation" within the meaning of  Section 162(m) of the Code  pursuant
       to   this  Section  20(b).  As   determined  by  the  Administrator,  the
       Performance Goal(s) applicable to  a grant, sale  or award shall  provide
       for  a targeted level or  levels of achievement based  upon any or all of
       the following for the Performance Period: corporate profitability; growth
       in sales;  growth in  income;  share price  appreciation; and  return  on
       investment.  The Performance Goal(s) may differ from employee to employee
       and from grant, sale or award to grant, sale or award.
 
           (iii) "PERFORMANCE PERIOD" means the period of time during which  the
       Performance Goals must be met.
 
                                      A-10
<PAGE>

                       LATTICE SEMICONDUCTOR CORPORATION

                   PROXY SOLICITED BY THE BOARD OF DIRECTORS
                ANNUAL MEETING OF STOCKHOLDERS, AUGUST 12, 1996

   The undersigned stockholder of LATTICE SEMICONDUCTOR CORPORATION, a Delaware 
corporation, hereby acknowledges receipt of the Notice of Annual Meeting of 
Stockholders and Proxy Statement, each dated July 8, 1996, and hereby appoints 
Cyrus Y. Tsui and Rodney F. Sloss, and each of them, proxies and 
attorneys-in-fact, with full power to each of substitution, on behalf and in 
the name of the undersigned, to represent the undersigned at the Annual Meeting 
of Stockholders of Lattice Semiconductor Corporation to be held on August 12, 
1996, at 1:00 p.m., Pacific Time, at the Embassy Suites Hotel, 9000 S.W. 
Washington Square Road, Tigard, Oregon 97223, and at any adjournment or 
adjournments thereof, and to vote all shares of Common Stock which the 
undersigned would be entitled to vote if then and there personally present, on 
the matters set forth below:


                          ^  FOLD AND DETACH HERE  ^

<PAGE>

                                              Please mark your votes 
                                              as indicated in this example  /X/



                                      FOR all 
                                  nominees except    WITHHOLD authority to
                                  as noted below.    vote for the nominees

1.  Election of Harry A. Merlo 
    and Larry W. Sonsini as 
    Class I Directors:                 / /                      / /

(INSTRUCTION: To withhold authority to vote for any individual nominee, write 
that nominee's name in the space provided below.)


                                          FOR      AGAINST      ABSTAIN

2.  Proposal to approve the Company's 
    1996 Stock Incentive Plan:            / /        / /          / /

3.   Proposal to ratify the appointment 
     of Price Waterhouse LLP as the 
     independent accountants of the 
     Company for the fiscal year ending 
     March 29, 1997:                      / /        / /          / /

4.   Transaction of such other business 
     as may properly come before the 
     meeting or any adjournment or 
     adjournments thereof.


THE SHARES REPRESENTED BY THIS PROXY WILL BE VOTED AS SPECIFIED ON THE REVERSE 
HEREOF.  IF NO SPECIFICATION IS MADE, THIS PROXY WILL BE VOTED FOR THE ELECTION 
OF THE NOMINEES FOR DIRECTOR, FOR APPROVAL OF THE COMPANY'S 1996 STOCK 
INCENTIVE PLAN, AND FOR THE RATIFICATION OF THE APPOINTMENT OF PRICE WATERHOUSE 
LLP AS INDEPENDENT ACCOUNTANTS.  IF ANY OTHER BUSINESS PROPERLY COMES BEFORE 
THE MEETING, THIS PROXY WILL BE VOTED IN ACCORDANCE WITH THE RECOMMENDATIONS OF 
MANAGEMENT. 

PLEASE MARK, DATE, SIGN AND RETURN THE PROXY CARD PROMPTLY.

Signature(s) _____________________________________    Dated ______________, 1996



(This proxy should be marked, dated and signed by the stockholder(s) exactly as 
his or her name appears hereon, and returned promptly in the enclosed envelope. 
Persons signing in a fiduciary capacity should so indicate.  If shares are held 
by joint tenants or as community property, both should sign.)

                          ^  FOLD AND DETACH HERE  ^



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