LSI LOGIC CORP
S-3/A, 1999-08-11
SEMICONDUCTORS & RELATED DEVICES
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<PAGE>   1


    AS FILED WITH THE SECURITIES AND EXCHANGE COMMISSION ON AUGUST 11, 1999



                                                      REGISTRATION NO. 333-83963

- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------

                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549
                            ------------------------


                                AMENDMENT NO. 1


                                       TO


                                    FORM S-3
                             REGISTRATION STATEMENT

                                     UNDER

                           THE SECURITIES ACT OF 1933
                            ------------------------

                             LSI LOGIC CORPORATION
             (EXACT NAME OF REGISTRANT AS SPECIFIED IN ITS CHARTER)

<TABLE>
<S>                                                      <C>
                        DELAWARE                                                94-2712976
    (STATE OR OTHER JURISDICTION OF INCORPORATION OR             (I.R.S. EMPLOYER IDENTIFICATION NUMBER)
                     ORGANIZATION)
</TABLE>

                            1551 MCCARTHY BOULEVARD
                           MILPITAS, CALIFORNIA 95035
                                 (408) 433-8000
  (ADDRESS, INCLUDING ZIP CODE, AND TELEPHONE NUMBER, INCLUDING AREA CODE, OF
                   REGISTRANT'S PRINCIPAL EXECUTIVE OFFICES)

                             DAVID E. SANDERS, ESQ.
                 VICE PRESIDENT, GENERAL COUNSEL AND SECRETARY
                             LSI LOGIC CORPORATION
                            1551 MCCARTHY BOULEVARD
                           MILPITAS, CALIFORNIA 95035
                                 (408) 433-8000
 (NAME, ADDRESS, INCLUDING ZIP CODE, AND TELEPHONE NUMBER, INCLUDING AREA CODE,
                             OF AGENT FOR SERVICE)

                                   COPIES TO:

                             LARRY W. SONSINI, ESQ.

                               JOHN A. FORE, ESQ.
                            EDWARD F. VERMEER, ESQ.
           WILSON SONSINI GOODRICH & ROSATI, PROFESSIONAL CORPORATION
                               650 PAGE MILL ROAD

                          PALO ALTO, CALIFORNIA 94304

                                 (650) 493-9300

        APPROXIMATE DATE OF COMMENCEMENT OF PROPOSED SALE TO THE PUBLIC:

   From time to time after the effective date of this Registration Statement.


    If the only securities being registered on this Form are being offered
pursuant to dividend or interest reinvestment plans, please check the following
box.  [ ]

    If any of the securities being registered on this Form are to be offered on
a delayed or continuous basis pursuant to Rule 415 under the Securities Act of
1933, other than securities offered only in connection with dividend or interest
reinvestment plans, check the following box.  [X]

    If this Form is filed to register additional securities for an offering
pursuant to Rule 462(b) under the Securities Act, please check the following box
and list the Securities Act registration statement number of the earlier
effective registration statement for the same offering.  [ ]
- ---------------

    If this Form is a post-effective amendment filed pursuant to Rule 462(c)
under the Securities Act, please check the following box and list the Securities
Act registration statement number of the earlier effective registration
statement for the same offering.  [ ]
- ---------------

    If delivery of the prospectus is expected to be made pursuant to Rule 434,
please check the following box.  [ ]

                        CALCULATION OF REGISTRATION FEE


<TABLE>
<CAPTION>
- -------------------------------------------------------------------------------------------------------------
- -------------------------------------------------------------------------------------------------------------
                                                                 PROPOSED MAXIMUM
             TITLE OF EACH CLASS OF SECURITIES                  AGGREGATE OFFERING           AMOUNT OF
                      TO BE REGISTERED                              PRICE(1)(2)          REGISTRATION FEE
- -------------------------------------------------------------------------------------------------------------
<S>                                                           <C>                     <C>
Debt Securities.............................................            --                      --
Common stock, $0.01 par value per share.....................            --                      --
Total.......................................................       $600,000,000           $166,800.00(3)
- -------------------------------------------------------------------------------------------------------------
- -------------------------------------------------------------------------------------------------------------
</TABLE>



(1) Or (i) if any Debt Securities are issued at an original issue discount, such
    greater principal amount as shall result in an aggregate initial offering
    price equal to the amount to be registered or (ii) if any Debt Securities
    are issued with a principal amount denominated in a foreign currency or
    composite currency, such principal amount as shall result in an aggregate
    initial offering price equivalent thereto in United States dollars at the
    time of initial offering.



(2) These figures are estimates made solely for the purpose of calculating the
    registration fee pursuant to Rule 457(o). Exclusive of accrued interest, if
    any, on the Debt Securities.



(3) $162,247.75 in registration fees were already paid upon the initial filing
    of this Registration Statement on July 29, 1999.



    THE REGISTRANT HEREBY AMENDS THIS REGISTRATION STATEMENT ON SUCH DATE OR
DATES AS MAY BE NECESSARY TO DELAY ITS EFFECTIVE DATE UNTIL THE REGISTRANT SHALL
FILE A FURTHER AMENDMENT WHICH SPECIFICALLY STATES THAT THIS REGISTRATION
STATEMENT SHALL THEREAFTER BECOME EFFECTIVE IN ACCORDANCE WITH SECTION 8(a) OF
THE SECURITIES ACT OF 1933 OR UNTIL THIS REGISTRATION STATEMENT SHALL BECOME
EFFECTIVE ON SUCH DATE AS THE COMMISSION, ACTING PURSUANT TO SAID SECTION 8(a),
MAY DETERMINE.


- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
<PAGE>   2


THE INFORMATION IN THIS PROSPECTUS IS NOT COMPLETE AND MAY BE CHANGED. WE MAY
NOT SELL THE SECURITIES UNTIL THE REGISTRATION STATEMENT FILED WITH THE
SECURITIES AND EXCHANGE COMMISSION IS EFFECTIVE. THIS PROSPECTUS IS NOT AN OFFER
TO SELL THESE SECURITIES AND IS NOT SOLICITING AN OFFER TO BUY THESE SECURITIES
IN ANY STATE WHERE THE OFFER OR SALE IS NOT PERMITTED.



                  SUBJECT TO COMPLETION, DATED AUGUST 11, 1999



PROSPECTUS



                                  $600,000,000

                                [LSI LOGIC LOGO]


                      BY THIS PROSPECTUS, WE MAY OFFER --



                                  COMMON STOCK


                                DEBT SECURITIES


                           -------------------------


     Our common stock is listed on the New York Stock Exchange Composite Tape
under the symbol "LSI." On August 10, 1999, the reported last sale price of our
common stock on the New York Stock Exchange Composite Tape was $53 7/16 per
share.


                           -------------------------


     SEE "RISK FACTORS" ON PAGE 8 FOR INFORMATION YOU SHOULD CONSIDER BEFORE
BUYING THE SECURITIES.

                           -------------------------


     We will provide specific terms of these securities in supplements to this
prospectus. You should read this prospectus and any supplements carefully before
you invest.


                           -------------------------


     This prospectus may not be used to offer and sell securities unless
accompanied by a prospectus supplement.


                           -------------------------


     NEITHER THE SECURITIES AND EXCHANGE COMMISSION NOR ANY STATE SECURITIES
COMMISSION HAS APPROVED OR DISAPPROVED OF THESE SECURITIES OR DETERMINED IF THIS
PROSPECTUS IS TRUTHFUL OR COMPLETE. ANY REPRESENTATION TO THE CONTRARY IS A
CRIMINAL OFFENSE.



                     This prospectus is dated             , 1999

<PAGE>   3


                               PROSPECTUS SUMMARY



     This prospectus is part of a registration statement that we filed with the
SEC utilizing a "shelf" registration process. Under this shelf process, we may,
from time to time, sell in one or more offerings up to a total dollar amount of
$600,000,000 of any combination of the following securities:



     - shares of our common stock, and



     - our debt securities.



     This prospectus provides you with a general description of the securities
we may offer. Each time we sell securities, we will provide a prospectus
supplement that will contain specific information about the terms of that
offering, including the specific amounts, prices and terms of the securities
offered. The prospectus supplement may also add, update or change information
contained in this prospectus. You should read both this prospectus and any
prospectus supplement together with additional information described below under
the heading "Where You Can Find More Information."



     We encourage you to read our annual report on Form 10-K, and quarterly
reports on Form 10-Q, in each case, as amended. Instructions on how you can get
copies of these documents are provided below under the heading "Where You Can
Find More Information."



COMMON STOCK



     We may issue shares of common stock. Common stockholders are entitled to
receive dividends declared by the Board of Directors, subject to rights of
preferred stock holders. Currently, we do not pay a dividend. Each holder of
common stock is entitled to one vote per share. The holders of common stock have
no preemptive rights.



DEBT SECURITIES



     We may offer unsecured general obligations in the form of either senior or
subordinated debt. The senior debt securities and the subordinated debt
securities are together referred to in this prospectus as the "debt securities".
The senior debt securities will have the same rank as all of our other
unsecured, unsubordinated debt. The subordinated debt securities will be
entitled to payment only after payment on our senior indebtedness and will rank
equally with our outstanding 4 1/4% convertible subordinated notes due 2004.
Senior indebtedness generally includes all indebtedness for money borrowed by
us, except indebtedness that is stated to be not senior to, or to have the same
rank as, or is expressly junior to the subordinated debt securities.



     The senior and subordinated debt will be issued under separate indentures
between us and State Street Bank and Trust Company of California, N.A., as
trustee. We have summarized the general features of the debt from the
indentures. We encourage you to read the indentures which are exhibits to this
Registration Statement No. (333-83963).



                             LSI LOGIC CORPORATION


     We are a worldwide leader in the design, development, manufacture and
marketing of high performance application specific integrated circuits and
application specific standard
                                        3
<PAGE>   4

products. Our submicron process technologies, combined with our CoreWare design
methodology, enable us to integrate system level solutions on a single chip. We
tailor our products to the specific application requirements of original
equipment manufacturers and other customers in the following markets:

     - networking,

     - telecom/wireless,

     - consumer,

     - computer,

     - storage components, and

     - storage systems.

     Many of our customers are worldwide leaders in their end markets. Our
customers include:

     - Cisco Systems, Inc.,

     - Compaq Computer Corporation,

     - Hewlett-Packard Company,

     - IBM Corporation,

     - NCR,

     - Sony Corporation, and


     - Sun Microsystems, Inc.


     Since our inception, we have based our technology and our business strategy
on integrating increasingly complex electronic building blocks onto a few chips
or a single chip. High-level, industry-standard building blocks of the type that
were previously independent chips, such as microprocessors, networking
controllers, digital signal processors and video compression engines, are used
as "cores" that are connected electronically, along with a customer's
proprietary logic and memory, to form an entire system on a single chip.
Consequently, our customers achieve higher system performance, lower system cost
and faster time-to-market with a differentiated product.

     We operate our own manufacturing facilities in order to control our
deployment of advanced wafer fabrication technology, our manufacturing costs and
our response to customer delivery requirements. In December 1998, we began
production in a state-of-the-art facility in Gresham, Oregon. The new facility
is equipped for advanced manufacturing operations and designed to accommodate
our expansion requirements well into the foreseeable future. Our production
operations in the United States and Japan, as well as those of our assembly and
test subcontractors in Asia, are ISO certified, an important international
measure for quality.

     We market our products and services worldwide through direct sales,
marketing and field technical staff and through independent sales
representatives and distributors. In addition, we specifically market our
storage system products to original equipment manufacturing and end users
through value added resellers.


     We were originally incorporated in California in 1980. In 1987, we were
reincorporated in Delaware. Our principal offices are located at 1551 McCarthy
Boulevard, Milpitas, California 95035, and our telephone number is (408)
433-8000.

                                        4
<PAGE>   5


                          GENERAL INDENTURE PROVISIONS



GENERAL INDENTURE PROVISIONS THAT APPLY TO SENIOR AND SUBORDINATED DEBT



     - Neither indenture limits the amount of debt that we may issue or provides
       holders any protection should there be a highly leveraged transaction
       involving our company.



     - The indentures generally allow us to merge or to consolidate with another
       U.S. company or convey, transfer or lease our properties and assets
       substantially as an entirety to another U.S. company, limited liability
       company, partnership, trust or other business entity, so long as the
       successor assumes our obligations under the indentures and immediately
       after giving effect to the transaction we are not in default under the
       indentures. If these events occur, the other company will be required to
       assume our responsibilities on the debt, and we will be released from all
       liabilities and obligations, except in the case of a lease.



     - The indentures provide that holders of a majority of the total principal
       amount of the debt outstanding in any series may vote to change our
       obligations or your rights concerning the debt. But to change the payment
       of principal, interest, or adversely effect the right to convert or
       certain other matters, every holder in that series must consent.



     - We may discharge the indentures and defease restrictive covenants by
       depositing sufficient funds with the trustee to pay the obligations when
       due, as long as we are not in default under the indentures at that time.
       All amounts due to you on the debt would be paid by the trustee from the
       deposited funds.



EVENTS OF DEFAULT



     The following are the events of default under the indentures:



     - Principal not paid when due,



     - Sinking fund payment not made when due,



     - Failure to pay interest for 30 days,



     - Covenants not performed for 90 days after notice,



     - Bankruptcy, insolvency or reorganization, and



     - Any other event of default in the indenture.



REMEDY



     Upon an event of default, other than a bankruptcy, insolvency or
reorganization, the trustee or holders of 25% of the principal amount
outstanding in a series may declare principal immediately payable. However, the
holders of a majority in principal amount may rescind this action.

                                        5
<PAGE>   6


GENERAL INDENTURE PROVISIONS THAT APPLY ONLY TO SENIOR DEBT SECURITIES



     The indenture relating to the senior debt securities contains covenants
restricting our ability to incur secured debt and our ability to sell or
transfer our property to a lender or investor, which then, either directly or
indirectly, leases the property back to us.



GENERAL INDENTURE PROVISIONS THAT APPLY ONLY TO SUBORDINATED DEBT SECURITIES



     The subordinated debt securities will be subordinated to all senior
indebtedness.



                      WHERE YOU CAN FIND MORE INFORMATION



     We are subject to the informational requirements of the Securities Exchange
Act of 1934 and file reports, proxy statements and other information with the
Commission. Such reports, proxy statements and other information filed by us may
be inspected and copied at the Public Reference Section of the Commission at 450
Fifth Street, N.W., Judiciary Plaza, Washington, D.C. 20549-1004. Information on
the operation of the Public Reference Room may be obtained by calling the
Commission at 1-800-SEC-0330. Reports, proxy and information statements and
other information filed electronically by us with the Commission are available
at the Commission's website at http://www.sec.gov.



     The Commission allows us to "incorporate by reference" into this prospectus
the information we filed with the Commission. This means that we can disclose
important information by referring you to those documents. The information
incorporated by reference is considered to be a part of this prospectus.
Information that we file later with the Commission will automatically update and
supersede this information. We incorporate by reference the documents listed
below and any future filings made by us with the Commission under Sections
13(a), 13(c), 14 or 15(d) of the Exchange Act until our offering is complete.



     - The description of the common stock in our Registration Statement on Form
       8-A filed on August 29, 1989, under Section 12(g) of the Exchange Act.



     - The description of our Amended and Restated Preferred Shares Rights
       Agreement in our Registration Statement on Form 8-A-12G/A filed on
       December 8, 1998, under Section 12(g) of the Exchange Act.



     - Annual Report on Form 10-K filed on March 5, 1999 and 10-K/A filed on
       July 29, 1999 for the fiscal year ended December 31, 1998.



     - Quarterly Report on Form 10-Q for the fiscal quarter ended March 28,
       1999, filed on May 12, 1999



     - Quarterly Report on Form 10-Q for the fiscal quarter ended June 27, 1999,
       filed on July 29, 1999



     - Current Reports on Form 8-K filed on March 15, 1999, March 23, 1999, June
       2, 1999 and July 26, 1999



     - Current Reports on Form 8-K/A filed on March 5, 1999, March 31, 1999, May
       28, 1999 and July 9, 1999

                                        6
<PAGE>   7


     You may request a copy of these filings, at no cost, by writing or
telephoning us at the following address:



     Investor Relations


     LSI Logic Corporation


     1551 McCarthy Boulevard


     Milpitas, California 95035


     (408) 433-6777



     You should rely only on the information incorporated by reference or
provided in this prospectus. We have not authorized anyone else to provide you
with different information. We are not making an offer of these securities in
any state where the offer is not permitted. You should not assume the
information in this prospectus is accurate as of any date other than the date on
the front of those documents.

                                        7
<PAGE>   8

                                  RISK FACTORS


     Before you invest in the debt securities or shares of common stock, you
should be aware of various risks, including those described below. You should
carefully consider these risk factors, together with all of the other
information included or incorporated by reference in this prospectus, before you
decide whether to purchase the debt securities or common stock. The risks set
out below are not the only risks we face.



     If any of the following risks occur, our business, financial condition and
results of operations could be materially adversely affected. In such case, the
trading price of the debt securities and common stock could decline, and you may
lose all or part of your investment.



IF WE ARE NOT ABLE TO IMPLEMENT NEW PROCESS TECHNOLOGIES SUCCESSFULLY, OUR
OPERATING RESULTS AND FINANCIAL CONDITION WILL BE ADVERSELY IMPACTED


     The semiconductor industry is intensely competitive and characterized by
constant technological change, rapid product obsolescence and evolving industry
standards. We believe that our future success depends, in part, on our ability
to improve on existing technologies and to develop and implement new ones in
order to continue to reduce semiconductor chip size and improve product
performance and manufacturing yields. We must also adopt and implement emerging
industry standards and adapt products and processes to technological changes. If
we are not able to implement new process technologies successfully or to achieve
volume production of new products at acceptable yields, our operating results
and financial condition will be adversely impacted.

     In addition, we must continue to develop and introduce new products that
compete effectively on the basis of price and performance and that satisfy
customer requirements. We continue to emphasize engineering development and
acquisition of CoreWare building blocks, or cores, and integration of our
CoreWare libraries into our design capabilities. Our cores and ASSPs are
intended to be based upon industry standard functions, interfaces and protocols
so that they are useful in a wide variety of systems applications. Development
of new products and cores often requires long-term forecasting of market trends,
development and implementation of new or changing technologies and a substantial
capital commitment. We cannot assure you that ASSPs or cores that we select for
investment of our financial and engineering resources will be developed or
acquired in a timely manner or will enjoy market acceptance.


DISRUPTION OF OUR MANUFACTURING FACILITIES COULD CAUSE DELAYS IN SHIPMENTS OF
PRODUCTS TO OUR CUSTOMERS AND COULD RESULT IN CANCELLATION OF ORDERS OR LOSS OF
CUSTOMERS


     A variety of reasons, including work stoppages, fire, earthquake, flooding
or other natural disasters, or Year 2000 related problems could cause disruption
of operations at any of our primary manufacturing facilities or at any of our
assembly subcontractors. Although we carry business interruption insurance, the
disruption could result in delays in shipments of products to our customers. We
cannot assure you that alternate production capacity would be available if a
major disruption were to occur, or that if it were available, it could be
obtained on favorable terms. A disruption could result in cancellation of orders
or loss of customers. The loss would result in a material adverse impact on our
operating results and financial condition.

                                        8
<PAGE>   9


OUR LACK OF LONG-TERM VOLUME PRODUCTION CONTRACTS WITH OUR CUSTOMERS COULD
RESULT IN INSUFFICIENT CUSTOMER ORDERS WHICH WOULD RESULT IN UNDERUTILIZATION OF
OUR MANUFACTURING FACILITIES


     We generally do not have long-term volume production contracts with our
customers. We cannot control whether and to what extent customers place orders
for any specific ASIC design or ASSPs and the quantities of products included in
those orders. Insufficient orders will result in underutilization of our
manufacturing facilities and would adversely impact our operating results and
financial condition.


BRINGING OUR NEW WAFER FABRICATION FACILITY TO FULL OPERATING CAPACITY COULD
TAKE LONGER AND COST MORE THAN ANTICIPATED


     Our new wafer fabrication facility in Gresham, Oregon, began production in
December 1998. The Gresham facility is a sophisticated, highly complex,
state-of-the-art factory. Actual production rates depend upon the reliable
operation and effective integration of a variety of hardware and software
components. We cannot assure you that all of these components will be fully
functional or successfully integrated within the currently projected schedule or
that the facility will achieve the forecasted yield targets. Our inability to
achieve and maintain acceptable production capacity and yield levels could have
a material adverse impact on our operating results and financial condition.

     In addition, the amount of capital expenditures required to bring the
facility to full operating capacity could be greater than we currently
anticipate. Higher costs to bring the facility to full operating capacity will
reduce margins and could have a material adverse impact on our results of
operations and financial condition. As of June 30, 1999, we have spent
approximately $789 million in capital expenditures on the Gresham facility. We
plan to spend no more than $250 million in capital expenditures in 1999,
approximately $84 million of which relate to the Gresham facility.


OUR LACK OF GUARANTEED SUPPLY ARRANGEMENTS WITH OUR SUPPLIERS COULD RESULT IN
OUR INABILITY TO OBTAIN SUFFICIENT RAW MATERIALS FOR USE IN THE PRODUCTION OF
OUR PRODUCTS


     We use a wide range of raw materials in the production of our
semiconductors, host adapter boards and storage systems products, including
silicon wafers, processing chemicals, and electronic and mechanical components.
We generally do not have guaranteed supply arrangements with our suppliers and
do not maintain an extensive inventory of materials for manufacturing. Some of
these materials we purchase from a limited number of vendors, and some we
purchase from a single supplier. On occasion, we have experienced difficulty in
securing an adequate volume and quality of materials. We cannot assure you that
if we have difficulty in obtaining materials or components in the future
alternative suppliers will be available, or that available suppliers will
provide materials and components in a timely manner or on favorable terms. If we
cannot obtain adequate materials for manufacture of products, there could be a
material impact on our operating results and financial condition.


HIGH CAPITAL REQUIREMENTS AND HIGH FIXED COSTS CHARACTERIZE OUR BUSINESS, AND WE
FACE A RISK THAT REQUIRED CAPITAL MIGHT BE UNAVAILABLE WHEN WE NEED IT


     In order to remain competitive, we must continue to make significant
investments in new facilities and capital equipment. We spent $330 million in
1998 and $29 million in the

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<PAGE>   10

first two fiscal quarters of 1999, net of retirements and refinancings, on
investments in new facilities and capital equipment, not including facilities
and capital equipment acquired with Symbios. We expect to spend no more than
$250 million during 1999. We expect to continue to make significant investments
in new facilities and capital equipment. We believe that we will be able to meet
our operating and capital requirements and obligations for the foreseeable
future using existing liquid resources, funds generated from our operations and
our ability to borrow funds. We believe that our level of liquid resources is
important, and we may seek additional equity or debt financing from time to
time. However, we cannot assure you that additional financing will be available
when needed or, if available, will be on favorable terms. Moreover, any future
equity or convertible debt financing will decrease existing stockholders'
percentage equity ownership and may result in dilution, depending on the price
at which the equity is sold or the debt is converted. In addition, the high
level of capital expenditures required to remain competitive results in
relatively high fixed costs. If demand for our products does not absorb
additional capacity, the fixed costs and operating expenses related to increases
in our production capacity could have a material adverse impact on our operating
results and financial condition.

THE NATURE OF OUR INDUSTRY COULD CREATE FLUCTUATIONS IN OUR OPERATING RESULTS
WHICH COULD RESULT IN A SUDDEN AND SIGNIFICANT DROP IN THE PRICE OF OUR STOCK
AND OTHER SECURITIES, PARTICULARLY ON A SHORT-TERM BASIS

     Future operating results will continue to be subject to quarterly
variations based upon a wide variety of factors including:

     - The cyclical nature of both the semiconductor industry and the markets
       addressed by our products,

     - The availability and extent of utilization of manufacturing capacity,

     - Erosion in the price of our products, and

     - The timing of new product introductions, the ability to develop and
       implement new technologies and other competitive factors.

     Operating results could also be impacted by sudden fluctuations in customer
requirements, currency exchange rate fluctuations and other economic conditions
affecting customer demand and the cost of operations in one or more of the
global markets in which we do business.


     We operate in a technologically advanced, rapidly changing and highly
competitive environment, and we predominantly sell custom products to customers
operating in a similar environment. Accordingly, changes in the conditions of
any of our customers may have a greater impact on our operating results and
financial condition than if we predominantly offered standard products that
could be sold to many purchasers. While we cannot predict what effect these
various factors may have on our financial results, their aggregate effect could
result in significant volatility in future performance and the trading prices of
our common stock. Our failure to meet the performance expectations published by
external sources could result in a sudden and significant drop in the price of
our common stock, and other securities, particularly on a short-term basis.


                                       10
<PAGE>   11

IF WE ARE UNABLE TO COMPETE EFFECTIVELY WITH EXISTING OR NEW COMPETITORS,
RESULTING LOSS OF COMPETITIVE POSITION COULD RESULT IN PRICE REDUCTIONS, FEWER
CUSTOMER ORDERS, REDUCED REVENUES, REDUCED GROSS MARGINS AND LOST MARKET SHARE

     We compete in markets that are intensely competitive, and which exhibit
both rapid technological changes and continued price erosion. Our competitors
include many large domestic and foreign companies that have substantially
greater financial, technical and management resources than us. Several major
diversified electronics companies offer ASIC products and/or other products that
are competitive with our product lines. Other competitors are smaller,
specialized and emerging companies attempting to sell products in particular
markets that we also target. In addition, we face competition from some
companies whose strategy is to provide a portion of the products and services
that we offer. For example, these competitors may offer semiconductor design
services, license design tools, and/or provide support for obtaining products at
an independent foundry. Some of our large customers, some of whom may have
licensed elements of our process and product technologies, may develop internal
design and production operations to produce their own ASICs, thereby displacing
our products. Therefore, we cannot assure you that we will be able to continue
to compete effectively with our existing or new competitors. Loss of competitive
position could result in price reductions, fewer customer orders, reduced
revenues, reduced gross margins, and loss of market share, any of which would
affect our operating results and financial condition.

     To remain competitive, we continue to evaluate our worldwide manufacturing
operations, looking for additional cost savings and technological improvements.
If we are not able to implement successfully new process technologies and to
achieve volume production of new products at acceptable yields, our operating
results and financial condition may be affected.

     Our future competitive performance depends on a number of factors,
including our ability to:

     - Accurately identify emerging technological trends and demand for product
       features and performance characteristics,

     - Develop and maintain competitive products,

     - Enhance our products by adding innovative features that differentiate our
       products from those of our competitors,

     - Bring products to market on a timely basis at competitive prices,

     - Properly identify target markets,

     - Respond effectively to new technological changes or new product
       announcements by others,

     - Reduce semiconductor chip size, increase device performance and improve
       manufacturing yields,

     - Adapt products and processes to technological changes, and

     - Adopt and/or set emerging industry standards.

     We cannot assure you that our design, development and introduction
schedules for new products or enhancements to our existing and future products
will be met. In addition, we cannot assure you that these products or
enhancements will achieve market acceptance, or that we will be able to sell
these products at prices that are favorable to us.

                                       11
<PAGE>   12

OUR SIGNIFICANT INVESTMENTS IN RESEARCH AND DEVELOPMENT BEFORE WE CONFIRM THE
TECHNICAL FEASIBILITY AND COMMERCIAL VIABILITY OF A PRODUCT PRESENT RISKS THAT
WE WILL BE UNABLE TO RECOVER THE DEVELOPMENT COSTS ASSOCIATED WITH SUCH PRODUCT

     We must continue to make significant investments in research and
development in order to continually enhance the performance and functionality of
our products, to keep pace with competitive products and to satisfy customer
demands for improved performance, features and functionality. Technical
innovations are inherently complex and require long development cycles and
appropriate professional staffing. We must complete development of such
innovations before they are obsolete, and make them sufficiently compelling to
attract customers. Also, we must incur substantial research and development
costs before we confirm the technical feasibility and commercial viability of a
product. Therefore, we spend substantial resources determining the feasibility
of certain innovations that may not lead to a product but may instead result in
numerous dead ends and sunk costs. We cannot assure you that revenues from
future products or product enhancements will be sufficient to recover the
development costs associated with such products or enhancements. Moreover, we
may not be able to secure the financial resources necessary to fund future
development.

OUR ACQUISITION AND INVESTMENT ALLIANCE ACTIVITIES COULD DISRUPT OUR ONGOING
BUSINESS

     We intend to continue to make investments in companies, products and
technologies, either through acquisitions or investment alliances. We are
currently evaluating potential acquisition and investment alliances and will
continue to do so on an ongoing basis. We do not currently have any commitments
for a material acquisition or investment alliance. Acquisitions and investment
activities often involve risks, including:

     - We may experience difficulty in assimilating the acquired operations and
       employees,

     - We may be unable to retain the key employees of the acquired operation,

     - The acquisition or investment may disrupt our ongoing business,

     - We may not be able to incorporate successfully the acquired technology
       and operations into our business and maintain uniform standards,
       controls, policies and procedures, and

     - We may lack the experience to enter into new markets, products or
       technologies.

     Some of these factors are beyond our control. Failure to manage growth
effectively and to integrate acquisitions would affect our operating results or
financial condition.

CHANGES IN FOREIGN CURRENCY EXCHANGE RATES COULD AFFECT OUR OPERATIONS OR CASH
FLOWS

     We have international subsidiaries that operate and sell our products
globally. Our international sales totaled approximately $560 million in 1998 and
$373 million in the first two fiscal quarters of 1999. Further, we purchase a
substantial portion of our raw materials and equipment from foreign suppliers,
and we incur labor and other operating costs in foreign currencies, particularly
in our Japanese manufacturing facilities. As a result, we are exposed to changes
in foreign currency exchange rates or weak economic conditions in the other
countries.

                                       12
<PAGE>   13

     Our debt obligations in Japan totaled approximately 8.6 billion yen,
approximately $71 million, at June 30, 1999. These obligations expose us to
exchange rate fluctuations for the period of time from the start of the
transaction until it is settled. In recent years, the yen has fluctuated
substantially against the U.S. dollar. We use forward exchange, currency swap,
interest rate swap and option contracts to manage our exposure to currency
fluctuations and changes in interest rates. There were no interest rate swap or
currency swap contracts outstanding as of June 30, 1999. We cannot assure you,
however, that such hedging transactions will eliminate exposure to currency rate
fluctuations and changes in interest rates. Notwithstanding our efforts to
foresee and mitigate the effects of changes in fiscal circumstances,
fluctuations in currency exchange rates in the future could affect our
operations and/or cash flows. In addition, high inflation rates in foreign
countries could affect our future results.

IF WE DO NOT SUCCESSFULLY COMPLETE MODIFICATIONS TO OUR SYSTEMS AND COMMERCIAL
ARRANGEMENTS IN A TIMELY MANNER TO ACCOMMODATE THE NEW EUROPEAN CURRENCY,
MATERIAL DISRUPTION OF OUR BUSINESS COULD OCCUR

     A new European currency was implemented in January 1999 to replace the
separate currencies of eleven western European countries. In response, we are
changing our operations as we modify systems and commercial arrangements to deal
with the new currency. Modifications are necessary in operations such as
payroll, benefits and pension systems, contracts with suppliers and customers,
and internal financial reporting systems. We expect a three-year transition
period during which transactions may also be made in the old currencies. This
requires dual currency processes for our operations. We have identified issues
involved and are developing and implementing solutions. The cost of this effort
is not expected to have a material effect on our business or results of
operations. We cannot assure you, however, that all problems will be foreseen
and corrected or that no material disruption of our business will occur.

CHANGES IN INTERNATIONAL TRADE AND ECONOMIC CONDITIONS COULD ADVERSELY IMPACT
OUR ABILITY TO MANUFACTURE OR SELL IN FOREIGN MARKETS AND COULD RESULT IN A
DECLINE IN CUSTOMER ORDERS

     We have substantial business activities in Europe and the Pan-Asia region.
Both manufacturing and sales of our products may be adversely impacted by
changes in political and economic conditions abroad. A change in the current
tariff structures, export compliance laws or other trade policies, in either the
United States or foreign countries could adversely impact our ability to
manufacture or sell in foreign markets.

     The recent economic crisis in Asia has affected business conditions and
pricing in the region. We subcontract test and assembly functions to
subcontractors in Asia. A significant reduction in the number or capacity of
qualified subcontractors or a substantial increase in pricing could cause longer
lead times, delays in the delivery of customer orders or increased costs. Such
conditions could have an adverse impact on our operating results. Additionally,
our customers sell products, especially consumer products, into the Pan-Asia
region. A significant decrease in sales to end-users and consumers in the area
could result in a decline in orders and have an impact on our operating results
and financial condition.

                                       13
<PAGE>   14

OUR MARKETING STRATEGY CREATES RISKS ASSOCIATED WITH CUSTOMER CONCENTRATION

     We expect that we will become increasingly dependent on a limited number of
customers for a substantial portion of our net revenues. This is as a result of
our strategy to direct our marketing and selling efforts toward selected
customers. During 1998, Sony Corporation accounted for 12% of net revenues. We
fill Sony's orders as they are placed and accepted. We do not have a supply
contract with Sony and Sony is not obligated to purchase our products.

     Our operating results and financial condition could be affected if:

     - We do not win new product designs from major customers,

     - Major customers cancel their business with us,

     - Major customers make significant changes in scheduled deliveries, or

     - Prices of products that we sell to these customers are decreased.

OUR BUSINESS AS A HIGH TECHNOLOGY COMPANY PRESENTS RISKS OF INTELLECTUAL
PROPERTY OBSOLESCENCE, INFRINGEMENT AND LITIGATION

     Our success is dependent in part on our technology and other proprietary
rights. We believe that there is value in the protection afforded by our
patents, patent applications and trademarks. However, the semiconductor industry
is characterized by rapidly changing technology. Our future success depends
primarily on the technical competence and creative skills of our personnel,
rather than on patent and trademark protection.

     As is typical in the semiconductor industry, from time to time we have
received communications from other parties asserting that they possess patent
rights, mask work rights, copyrights, trademark rights or other intellectual
property rights which cover certain of our products, processes, technologies or
information. We are evaluating several such assertions. We are considering
whether to seek licenses with respect to certain of these claims. Based on
industry practice, we believe that licenses or other rights, if necessary, could
be obtained on commercially reasonable terms for existing or future claims.
Nevertheless, we cannot assure you that licenses can be obtained, or if obtained
will be on acceptable terms or that litigation or other administrative
proceedings will not occur. Litigation of such claims or the inability to obtain
certain licenses or other rights or to obtain such licenses or rights on
favorable terms could have an impact on our operating results and financial
condition.

CYCLICAL FLUCTUATIONS IN OUR MARKETS COULD CAUSE A DOWNTURN IN DEMAND FOR OUR
PRODUCTS AND RESULT IN LOWER REVENUES

     We may experience period-to-period fluctuations or a decline as a result of
the following:

     - Rapid technological change, rapid product obsolescence, and price erosion
       in our products,

     - Fluctuations in supply and demand in the semiconductor or storage markets
       for our products,

     - Maturing product cycles in our products or products produced by our
       customers, and

                                       14
<PAGE>   15

     - Fluctuations or declines in general economic conditions, which often
       produce abrupt fluctuations or declines in our products or the products
       or services offered by our suppliers and customers.

     Significant industry-wide fluctuations or a downturn as a result of these
factors could affect our operating results and financial condition.

     The semiconductor industry also has experienced periods of rapid expansion
of production capacity. Even if our customers' demand were not to decline, the
availability of additional excess production capacity in our industry creates
competitive pressure that can degrade pricing levels, which can also depress our
revenues. Also, during such periods, customers who benefit from shorter lead
times may delay some purchases into future periods, which could affect our
demand and revenues for the short term. We cannot assure you that we will not
experience such downturns or fluctuations in the future, which could affect our
operating results and financial condition.

WE DEPEND ON KEY EMPLOYEES AND FACE COMPETITION IN HIRING AND RETAINING
QUALIFIED EMPLOYEES

     Our employees are vital to our success. Moreover, our key management,
engineering and other employees are difficult to replace. We generally do not
have employment contracts with our key employees. Further, we do not maintain
key person life insurance on any of our employees. The expansion of high
technology companies in Silicon Valley and Colorado has increased demand and
competition for qualified personnel. We may not be able to attract, assimilate
or retain additional highly qualified employees in the future. These factors
could affect our business, financial condition and results of operations.

IF WE, OUR SUPPLIERS OR OUR CUSTOMERS DO NOT SUCCESSFULLY, TIMELY OR ADEQUATELY
ADDRESS THE YEAR 2000 ISSUE, WE COULD EXPERIENCE A SIGNIFICANT DISRUPTION OF OUR
FINANCIAL MANAGEMENT AND CONTROL SYSTEMS OR A LENGTHY INTERRUPTION IN OUR
MANUFACTURING OPERATIONS

     As with many other companies, the Year 2000 computer issue presents risks
for us. We use a significant number of computer software programs and operating
systems in our internal operations, including applications used in our
financial, product development, order management and manufacturing systems.

     The inability of computer software programs to accurately recognize,
interpret and process date codes designating the year 2000 and beyond could
cause systems to yield inaccurate results or encounter operating problems
resulting in the interruption of the business operations which they control.
This could adversely affect our ability to process orders, forecast production
requirements or issue invoices. A significant failure of the computer integrated
manufacturing systems, which monitor and control factory equipment, would
disrupt manufacturing operations and cause a delay in completion and shipping of
products. Moreover, if our critical suppliers' or customers' systems or products
fail because of a Year 2000 malfunction, it could impact our operating results.
Finally, our own products could malfunction as a result of a failure in date
recognition, giving rise to the possibility of warranty claims and litigation.

     Based on currently available information, our management does not believe
that the Year 2000 issues discussed above, related to internal systems or
products sold to customers, will have a material impact on our financial
condition or overall trends in

                                       15
<PAGE>   16

results of operations. However, we are uncertain to what extent we may be
affected by such matters. A significant disruption of our financial management
and control systems or a lengthy interruption in our manufacturing operations
caused by a Year 2000 related issue could result in a material adverse impact on
our operating results and financial condition. In addition, it is possible that
a supplier's failure to ensure Year 2000 capability or our customer's concerns
about Year 2000 readiness of our products would have a material adverse effect
on our results of operations.


OUR ABILITY TO REPAY THE DEBT SECURITIES IS DEPENDENT IN PART ON THE EARNINGS OF
OUR SUBSIDIARIES



     The debt securities are exclusively obligations of LSI Logic Corporation. A
substantial portion of our operations are conducted through our subsidiaries. As
a result, our cash flow and our ability to service our debt, including the debt
securities, is dependent upon the earnings of our subsidiaries. In addition, we
are dependent on the distribution of earnings, loans or other payments by our
subsidiaries to us.



     Our subsidiaries are separate and distinct legal entities. Our subsidiaries
have no obligation to pay any amounts due on the debt securities. Our
subsidiaries are not required to provide us with funds for our payment
obligations, whether by dividends, distributions, loans or other payments. In
addition, any payment of dividends, distributions, loans or advances by our
subsidiaries to us could be subject to statutory or contractual restrictions.
Payments to us by our subsidiaries will also be contingent upon our
subsidiaries' earnings and business considerations.


     Our right to receive any assets of any of our subsidiaries upon their
liquidation or reorganization, and therefore the right of the holders to
participate in those assets, will be effectively subordinated to the claims of
that subsidiary's creditors, including trade creditors. In addition, even if we
were a creditor to any of our subsidiaries, our rights as a creditor would be
subordinate to any security interest in the assets of our subsidiaries and any
indebtedness of our subsidiaries senior to that held by us.


POSSIBLE VOLATILITY OF PRICE OF COMMON STOCK



     The market price of our common stock has been volatile in the past and may
be volatile in the future. The trading price of the common stock may be
significantly affected by the following factors:


     - The cyclical nature of both the semiconductor industry and the markets
       addressed by our products,

     - The availability and extent of utilization of manufacturing capacity,

     - Erosion in the price of our products,

     - The timing of new product introductions, the ability to develop and
       implement new technologies and other competitive factors,

     - Our announcement of new products or product enhancements or similar
       announcements by our competitors, and

     - General market conditions or market conditions specific to particular
       industries.


     In addition, the stock prices of many companies in the technology and
emerging growth sectors have fluctuated widely due to events unrelated to their
operating performance. These fluctuations may adversely affect the market price
of our common stock.


                                       16
<PAGE>   17

                                USE OF PROCEEDS

     Unless otherwise indicated in the applicable prospectus supplement, we
anticipate that any net proceeds from the sale of securities offered by this
prospectus will be used to fund expansion of our business, including for:


     - additional working capital,


     - capital expenditures,


     - repayment of existing indebtedness,


     - acquisitions of products, technologies and businesses, and

     - general corporate purposes.

     When we offer a particular series of securities offered by this prospectus,
the prospectus supplement relating to that offering will set forth the intended
use of the net proceeds received from that offering. Pending the application of
the net proceeds, we expect to invest the proceeds from the sale of offered
securities in interest-bearing securities.

                       RATIO OF EARNINGS TO FIXED CHARGES

     The ratio of earnings to fixed charges for each of the periods indicated is
as follows:


<TABLE>
<CAPTION>
                                                                                     SIX MONTHS ENDED
                                                FISCAL YEAR ENDED DECEMBER 31,      -------------------
                                             ------------------------------------   JUNE 30,   JUNE 30,
                                             1994   1995    1996    1997    1998      1998       1999
                                             ----   -----   -----   -----   -----   --------   --------
<S>                                          <C>    <C>     <C>     <C>     <C>     <C>        <C>
Ratio of earnings to fixed charges.........   5.7x   11.4x    7.2x   10.6x     --      9.5x       1.7x
</TABLE>



     These computations include us and our consolidated subsidiaries. For these
ratios, "earnings" represents income before taxes plus fixed charges. Ratio of
earnings to fixed charges is computed by dividing (i) earnings before taxes
adjusted for fixed charges, minority interest and capitalized interest net of
amortization by (ii) fixed charges, which includes interest expense and
capitalized interest incurred, plus the portion of interest expense under
operating leases deemed by us to be representative of the interest factor, plus
amortization of debt issuance costs. In 1998, earnings were inadequate to cover
fixed charges by $140 million.



     Our fiscal years ended on December 31, 1997 and 1998, and the Sunday
closest to December 31, in 1994, 1995 and 1996. For presentation purposes, this
prospectus refers to December 31 as our fiscal year end.


                       DESCRIPTION OF THE DEBT SECURITIES


     The debt securities will either be our senior debt securities or our
subordinated debt securities. The debt securities will be issued under one or
more separate indentures between us and State Street Bank and Trust Company of
California, N.A., as trustee. Senior debt securities will be issued under a
senior indenture and subordinated debt securities will be issued under a
subordinated indenture. Together, the senior indenture and subordinated
indenture are called indentures. The prospectus, together with its prospectus
supplement, will describe all the material terms of a particular series of debt
securities.


                                       17
<PAGE>   18


     The following is a summary of the most important provisions and definitions
of the indentures. For additional information, you should look at the applicable
indenture that is filed as an exhibit to the registration statement which
includes this prospectus. In this description of the debt securities, the words
"LSI", "we", "us" or "our" refer only to LSI Logic Corporation and not to any of
our subsidiaries.


GENERAL

     Debt securities may be issued in separate series without limitation as to
aggregate principal amount. We may specify a maximum aggregate principal amount
for the debt securities of any series. We are not limited as to the amount of
debt securities we may issue under the indentures.


     The prospectus supplement will set forth:



     - whether the debt securities are senior or subordinated,



     - the offering price,



     - the title,



     - any limit on the aggregate principal amount,



     - the person who shall be entitled to receive interest, if other than the
       record holder on the record date,



     - the date the principal will be payable,



     - the interest rate, if any, the date interest will accrue, the interest
       payment dates and the regular record dates,



     - the place where payments shall be made,



     - any mandatory or optional redemption provisions,



     - if applicable, the method for determining how principal, premium, if any,
       or interest will be calculated by reference to an index or formula,



     - if other than U.S. currency, the currency or currency units in which
       principal, premium, if any, or interest will be payable and whether we or
       the holder may elect payment to be made in a different currency,



     - the portion of the principal amount that will be payable upon
       acceleration of stated maturity, if other than the entire principal
       amount,



     - if the principal amount payable at stated maturity will not be
       determinable as of any date prior to stated maturity, the amount which
       will be deemed to be the principal amount,



     - any defeasance provisions if different from those described below under
       "Satisfaction and Discharge -- Defeasance,"



     - any conversion or exchange provisions,



     - whether the debt securities will be issuable in the form of a global
       security,


                                       18
<PAGE>   19


     - any subordination provisions if different from those described below
       under "Subordinated Debt Securities,"



     - any deletions of, or changes or additions to, the events of default or
       covenants, and



     - any other specific terms of such debt securities.



     Unless otherwise specified in the prospectus supplement:



     - the debt securities will be registered debt securities; and



     - registered debt securities denominated in U.S. dollars will be issued in
       denominations of $1,000 or an integral multiple of $1,000.



     Debt securities may be sold at a substantial discount below their stated
principal amount, bearing no interest or interest at a rate which at time of
issuance is below market rates.



EXCHANGE AND TRANSFER



     Debt securities may be transferred or exchanged at the office of the
security registrar or at the office of any transfer agent designated by us. We
will not impose a service charge for any transfer or exchange, but we may
require holders to pay any tax or other governmental charges associated with any
transfer or exchange.



     In the event of any potential redemption of debt securities of any series,
we will not be required to:



     - issue, register the transfer of, or exchange, any debt security of that
       series during a period beginning at the opening of business 15 days
       before the day of mailing of a notice of redemption and ending at the
       close of business on the day of the mailing, or



     - register the transfer of or exchange any debt security of that series
       selected for redemption, in whole or in part, except the unredeemed
       portion being redeemed in part.



     We have initially appointed the trustee as the security registrar. Any
transfer agent, in addition to the security registrar, initially designated by
us will be named in the prospectus supplement. We may designate additional
transfer agents or change transfer agents or change the office of the transfer
agent. However, we will be required to maintain a transfer agent in each place
of payment for the debt securities of each series.



GLOBAL SECURITIES



     The debt securities of any series may be represented, in whole or in part,
by one or more global securities. Each global security will:



     - be registered in the name of a depositary that we will identify in a
       prospectus supplement,



     - be deposited with the depositary or nominee or custodian, and



     - bear any required legends.


                                       19
<PAGE>   20


     No global security may be exchanged in whole or in part for debt securities
registered in the name of any person other than the depositary or any nominee
unless:



     - the depositary has notified us that it is unwilling or unable to continue
       as depositary or has ceased to be qualified to act as depositary,



     - an event of default is continuing, or



     - any other circumstances described in a prospectus supplement.



     As long as the depositary, or its nominee, is the registered owner of a
global security, the depositary or nominee will be considered the sole owner and
holder of the debt securities represented by the global security for all
purposes under the indentures. Except in the above limited circumstances, owners
of beneficial interests in a global security will not be:



     - entitled to have the debt securities registered in their names,



     - entitled to physical delivery of certificated debt securities, and



     - considered to be holders of those debt securities under the indenture.



     Payments on a global security will be made to the depositary or its nominee
as the holder of the global security. Some jurisdictions have laws that require
that certain purchasers of securities take physical delivery of such securities
in definitive form. These laws may impair the ability to transfer beneficial
interests in a global security.



     Institutions that have accounts with the depositary or its nominee are
referred to as "participants." Ownership of beneficial interests in a global
security will be limited to participants and to persons that may hold beneficial
interests through participants. The depositary will credit, on its book-entry
registration and transfer system, the respective principal amounts of debt
securities represented by the global security to the accounts of its
participants.



     Ownership of beneficial interests in a global security will be shown on and
effected through records maintained by the depositary, with respect to
participants' interests, or any participant, with respect to interests of
persons held by participants on their behalf.



     Payments, transfers and exchanges relating to beneficial interests in a
global security will be subject to policies and procedures of the depositary.
The depositary's policies and procedures may change from time to time. Neither
we nor the trustee will have any responsibility or liability for the
depositary's or any participant's records with respect to beneficial interests
in a global security.



PAYMENT AND PAYING AGENTS



     The provisions of this paragraph will apply to the debt securities unless
otherwise indicated in the prospectus supplement. Payment of interest on a debt
security on any interest payment date will be made to the person in whose name
the debt security is registered at the close of business on the regular record
date. Payment on debt securities of a particular series will be payable at the
office of a paying agent or paying agents designated by us. However, at our
option, we may pay interest by mailing a check to the record holder. The
corporate trust office will be designated as our sole paying agent.


                                       20
<PAGE>   21


     We may also name any other paying agents in the prospectus supplement. We
may designate additional paying agents, change paying agents or change the
office of any paying agent. However, we will be required to maintain a paying
agent in each place of payment for the debt securities of a particular series.



     All moneys paid by us to a paying agent for payment on any debt security
which remain unclaimed for a period ending the earlier of:



     - 10 business days prior to the date the money would be turned over to the
       state, or



     - at the end of two years after such payment was due



will be repaid to us. Thereafter, the holder may look only to LSI for such
payment.



CONSOLIDATION, MERGER AND SALE OF ASSETS



     We may not consolidate with or merge into any other person, in a
transaction in which we are not the surviving corporation, or convey, transfer
or lease our properties and assets substantially as an entirety to, any person,
unless:



     - the successor, if any, is a U.S. corporation, limited liability company,
       partnership, trust or other business entity,



     - the successor assumes our obligations on the debt securities and under
       the indentures,



     - immediately after giving effect to the transaction, no default or event
       of default shall have occurred and be continuing, and



     - certain other conditions are met.



EVENTS OF DEFAULT



     Each indenture defines an event of default with respect to any series of
debt securities as one or more of the following events:



          (1) failure to pay principal of or any premium on any debt security of
     that series when due,



          (2) failure to pay any interest on any debt security of that series
     for 30 days when due,



          (3) failure to deposit any sinking fund payment when due,



          (4) failure to perform any other covenant in the indenture continued
     for 90 days after being given the notice required in the indenture,



          (5) our bankruptcy, insolvency or reorganization, and



          (6) any other event of default specified in the indenture.



     An event of default of one series of debt securities is not necessarily an
event of default for any other series of debt securities.



     If an event of default, other than an event of default described in clause
(5) above, occurs and continues, either the trustee or the holders of at least
25% in aggregate


                                       21
<PAGE>   22


principal amount of the outstanding securities of that series may declare the
principal amount of the debt securities of that series to be due and payable
immediately. If an event of default described in clause (5) above occurs, the
principal amount of all the debt securities of that series, will automatically
become immediately due and payable. Any payment by us on the subordinated debt
securities following any acceleration will be subject to the subordination
provisions described below under "Subordinated Debt Securities."



     After acceleration the holders of a majority in aggregate principal amount
of the outstanding securities of that series may, under certain circumstances,
rescind and annul such acceleration if all events of default, other than the
non-payment of accelerated principal, or other specified amount, have been cured
or waived.



     Other than the duty to act with the required care during an event of
default, the trustee will not be obligated to exercise any of its rights or
powers at the request of the holders unless the holders offer the trustee
reasonable indemnity. Generally, the holders of a majority in aggregate
principal amount of the outstanding debt securities of any series will have the
right to direct the time, method and place of conducting any proceeding for any
remedy available to the trustee or exercising any trust or power conferred on
the trustee.



     A holder will have the right to begin a proceeding under the indentures, or
for the appointment of a receiver or a trustee, or for any other remedy under
the indentures only if:



          (1) the holder has previously given to the trustee written notice of a
     continuing event of default with respect to the debt securities of that
     series,



          (2) the holders of at least 25% in aggregate principal amount of the
     outstanding debt securities of that series have made a written request and
     have offered reasonable indemnity to the trustee to begin the proceeding,



          (3) the trustee has not started the proceeding within 60 days after
     the request, and



          (4) the trustee has not received direction inconsistent with the
     original request from the holders of a majority in aggregate principal
     amount of the outstanding debt securities of that series within 60 days
     after the original request.



     Holders may, however, sue to enforce the payment of principal, premium or
interest on or after the due date without following the procedures listed in (1)
through (4) above.



     We will furnish the trustee an annual statement by our officers as to
whether or not we are in default in the performance of the indenture and, if so,
specifying all known defaults.



MODIFICATION AND WAIVER



     We and the trustee may make modifications and amendments to the indentures
with the consent of the holders of a majority in aggregate principal amount of
the outstanding securities of each series affected by the modification or
amendment.


                                       22
<PAGE>   23


     However, neither we nor the trustee may make any modification or amendment
without the consent of the holder of each outstanding security of that series
affected by the modification or amendment if such modification or amendment
would:



     - change the stated maturity of any debt security,



     - reduce the principal, premium, if any, or interest on any debt security,



     - reduce the principal of an original issue discount security or any other
       debt security payable on acceleration of maturity,



     - change the place of payment or the currency in which any debt security is
       payable,



     - impair the right to sue for any payment after the stated maturity or
       redemption date,



     - if subordinated debt securities, modify the subordination provisions in a
       materially adverse manner to the holders,



     - adversely affect the right to convert any debt security, or



     - change the provisions in the indenture that relate to modifying or
       amending the indenture.



SATISFACTION AND DISCHARGE; DEFEASANCE



     We may be discharged from our obligations on the debt securities of any
series that have matured or will mature or be redeemed within one year if we
deposit with the trustee enough cash to pay all the principal, interest and any
premium due to the stated maturity date or redemption date of the debt
securities.



     Each indenture contains a provision that permits us to elect:



     - to be discharged from all of our obligations, subject to limited
       exceptions, with respect to any series of debt securities then
       outstanding; and/or



     - to be released from our obligations under the following covenants and
       from the consequences of an event of default resulting from a breach of
       these covenants:



          (1) the limitations on sale and leaseback transactions under the
     senior indenture,



          (2) the limitations on secured debt under the senior indenture,



          (3) the subordination provisions under the subordinated indenture, and



          (4) covenants as to payment of taxes and maintenance of properties.



     To make either of the above elections, we must deposit in trust with the
trustee enough money to pay in full the principal, interest and premium on the
debt securities. This amount may be made in cash and/or U.S. government
obligations. As a condition to either of the above elections, we must deliver to
the trustee an opinion of counsel that the holders of the debt securities will
not recognize income, gain or loss for Federal income tax purposes as a result
of the action.



     If we elect to be discharged from all of our obligations as outlined above
in the first bullet point in this section, the holders of the debt securities of
the series will not be


                                       23
<PAGE>   24


entitled to the benefits of the indenture, except for registration of transfer
and exchange of debt securities and replacement of lost, stolen or mutilated
debt securities.



NOTICES



     Notices to holders will be given by mail to the addresses of the holders in
the security register.



GOVERNING LAW



     The indentures and the debt securities will be governed by, and construed
under, the law of the State of New York, without regard to conflicts of laws
principles.



REGARDING THE TRUSTEE



     The indentures limit the right of the trustee, should it become a creditor
of LSI, to obtain payment of claims or secure its claims.



     The trustee is permitted to engage in certain other transactions. However,
if the trustee acquires any conflicting interest, and there is a default under
the debt securities of any series for which they are trustee, the trustee must
eliminate the conflict or resign.



SENIOR DEBT SECURITIES



     The senior debt securities will be unsecured and will rank equally with all
of our other unsecured and non-subordinated senior debt.



Covenants in the Senior Indenture



     Limitations on Liens. Neither we nor any restricted subsidiary will issue,
incur, create, assume or guarantee any secured debt without securing the senior
debt securities equally and ratably with or prior to that secured debt unless
the total amount of all secured debt that the senior debt securities are not
secured equally and ratably with, would not exceed the greater of $300 million
or 10% of our consolidated net tangible assets.



     Limitations on Sale and Lease-back Transactions. Subject to the last
paragraph of this Section, neither we nor any restricted subsidiary will enter
into any lease longer than three years covering any of our principal property or
any restricted subsidiary that is sold to any other person in connection with
that lease unless either:



          (1) we or any restricted subsidiary would be entitled to incur
     indebtedness secured by a mortgage on the principal property involved in
     such transaction at least equal in amount to the attributable debt with
     respect to the lease, without equally and ratably securing the senior debt
     securities, pursuant to "Limitation on Liens" described above, or



          (2) an amount equal to the greater of the following amounts is applied
     within 180 days to the retirement of our or any restricted subsidiary's
     long-term debt or the purchase or development of comparable property:



     - the net proceeds from the sale; and



     - the attributable debt with respect to the sale and leaseback transaction.


                                       24
<PAGE>   25


     However, either we or our restricted subsidiaries would be able to enter
into a sale and lease back transaction without being required to apply the net
proceeds from this sale and lease back transaction as required by (2) above if
the sum of the following amounts would not exceed the greater of $300 million or
10% of our consolidated net tangible assets:



     - the total amount of the sale and leaseback transactions, and



     - the total amount of secured debt.



     Absence of Certain Covenants. The prospectus supplement will specify any
additional restrictive covenants applicable to the senior debt securities. The
senior indenture does not contain provisions permitting the holders of senior
debt securities to require us to repurchase or redeem the senior debt securities
in the event of a takeover, recapitalization or similar restructuring, highly
leveraged transaction, or downgrading of our debt ratings.



Definitions



     "attributable debt" with regard to a sale and leaseback transaction means
the lesser of:



          (1) the fair market value of such property as determined in good faith
     by our board of directors, or



          (2) discounted present value of all net rentals under the lease.



     "consolidated net tangible assets" means total assets, less reserves, after
deducting:



     - total current liabilities, excluding:



     - notes and loans payable,



     - current maturities of long-term debt,



     - current maturities of capital leases, and



     - certain intangible assets to the extent included in total assets.



     "mortgage" means a mortgage, security interest, pledge, lien, charge or
other encumbrance.



     "Nonrecourse obligation" means indebtedness substantially related to:



     - acquisition of assets not previously owned by us or any restricted
       subsidiary, or



     - the financing of any project involving the development of either our or
       any of our restricted subsidiary's property in which the only recourse is
       to the proceeds or the project financed with the proceeds of the
       transaction.



     "principal property" means the land, improvements, buildings and fixtures
owned by us or a subsidiary located in the United States that constitutes our
principal corporate office, any manufacturing plant or any manufacturing
facility and has a book value in excess of .75% of our consolidated net tangible
assets as of the determination date. Principal property does not include any
property that our board of directors has determined not to be of material
importance to the business conducted by us and our subsidiaries, taken as a
whole.


                                       25
<PAGE>   26


     "restricted subsidiary" means any subsidiary that owns any principal
property. "Restricted subsidiary" does not include:



     - any subsidiary primarily engaged in financing receivables or in the
       finance business, or



     - any of our less than 80% owned subsidiaries if the common stock of the
       subsidiary is traded on any national securities exchange or quoted on the
       Nasdaq National Market or over the counter.



     "secured debt" means any of our debt or any debt of a restricted subsidiary
for borrowed money secured by a mortgage on any principal property or any stock
or indebtedness of a restricted subsidiary. Secured debt does not include:



     - mortgages on property existing at the time of acquisition of the property
       by us or any subsidiary,



     - mortgages on property, shares of stock or indebtedness or other assets of
       a corporation existing at the time it becomes a restricted subsidiary,



     - mortgages on property, shares of stock or indebtedness or other assets
       existing at the time of acquisition by us or a restricted subsidiary
       (including leases), or mortgages to secure payment of all or any part of
       the purchase price, or to secure any debt within 270 days after the
       acquisition thereof, or in the case of property, the completion of
       construction, improvement or commencement of substantial commercial
       operation of the property,



     - mortgages to secure indebtedness owing to us or to a restricted
       subsidiary,



     - mortgages existing at the date of the senior indenture,



     - mortgages on property existing at the time the person is merged or
       consolidated with us or a restricted subsidiary,



     - mortgages on property at the time of a sale or lease of the properties of
       a person as an entirety or substantially as an entirety to us or a
       restricted subsidiary,



     - mortgages incurred to finance the acquisition or construction of property
       secured by mortgages in favor of the United States or a political
       subdivision of the United States,



     - mortgages incurred in connection with asset acquisition or a project
       financed with a non-recourse obligation, or



     - mortgages constituting any extension, renewal or replacement of any
       mortgage listed above to the extent the mortgage is not increased.



SUBORDINATED DEBT SECURITIES



     The indebtedness evidenced by the subordinated debt securities is
subordinated to the extent provided in the subordinated indenture to the prior
payment in full in cash or other payment satisfactory to holders of senior
indebtedness of all senior indebtedness, including any senior debt securities,
and will rank equally with our outstanding 4 1/4% convertible subordinated notes
due 2004.


                                       26
<PAGE>   27


     Upon any distribution of our assets upon any dissolution, winding up,
liquidation or reorganization, payments on the subordinated debt securities will
be subordinated in right of payment to the prior payment in full in cash or
other payment satisfactory to holders of senior indebtedness of all senior
indebtedness.



     As a result of these subordination provisions, in the event of our
bankruptcy, dissolution or reorganization, holders of senior indebtedness may
receive more, ratably, and holders of the subordinated debt securities may
receive less, ratably, than our other creditors.



     In the event of any acceleration of the subordinated debt securities
because of an event of default, holders of any senior indebtedness would be
entitled to payment in full in cash or other payment satisfactory to holders of
senior indebtedness of all senior indebtedness before the holders of
subordinated debt securities are entitled to receive any payment or
distribution.



     We are required to promptly notify holders of senior indebtedness if
payment of the subordinated debt securities is accelerated because of an event
of default.



     We may also not make payment on the subordinated debt securities if:



     - a default in the payment of senior indebtedness occurs and is continuing,
       or



     - any other default occurs and is continuing with respect to designated
       senior indebtedness that permits holders or their representatives of
       designated senior indebtedness to accelerate its maturity, and the
       trustee receives a payment blockage notice from us or some other person
       permitted to give the notice under the subordinated indenture.



     - any judicial proceeding shall be pending with respect to any payment
       default or non-payment default.



     We may and shall resume payments on the subordinated debt securities:



     - in case of a payment default, when the default is cured or waived or
       ceases to exist, and



     - in case of a nonpayment default, the earlier of when the default is cured
       or waived or ceases to exist or 179 days after the receipt of the payment
       blockage notice.



     No new payment blockage period may start unless 365 days have elapsed from
the effectiveness of the prior payment blockage notice.



     No nonpayment default that existed or was continuing on the date of
delivery of any payment blockage notice to the trustee shall be the basis for a
subsequent payment blockage notice.



     The subordination provisions will not prevent the occurrence of any event
of default under the subordinated indenture.



     If the trustee or any holder receives any payment that should not have been
made to them in contravention of subordination provisions before all senior
indebtedness is paid in full, then such payment will be held in trust for the
holders of senior indebtedness.



     Senior debt securities will constitute senior debt under the subordinated
indenture.


                                       27
<PAGE>   28


     If the Trustee, any paying agent or any holder receives any payment or
distribution of assets in contravention of these subordination provisions before
all senior indebtedness is paid in full in cash or other payment satisfactory to
holders of senior indebtedness, then this payment or distribution will be held
in trust for the holders of senior indebtedness to the extent necessary to make
payment in full in cash or payment satisfactory to the holders of senior
indebtedness of all unpaid senior indebtedness.



Definitions



     "designated senior debt" means senior indebtedness under our existing
credit facility and any other senior indebtedness that expressly provides that
it is "designated senior indebtedness."



     "indebtedness" means:



          (1) all obligations


              - for borrowed money,


              - evidenced by a note, debenture, bond or written instrument,


              - in respect of leases required, in conformity with generally
                accepted accounting principles, to be accounted for as
                capitalized lease obligations on the balance sheet,



             - all obligations and other liabilities under any lease or related
               document in connection with the lease of real property which
               provides that such person is contractually obligated to purchase
               or cause a third party to purchase the leased property and as a
               result guarantee a minimum residual value of the leased property
               to the lessor and the obligations of such person under such lease
               or related document to purchase or to cause a third party to
               purchase such leased property, or



             - in respect of letters of credit, local guarantees or bankers'
               acceptances;



          (2) all obligation of others of the type described in clause (1) above
              or clause (3), (4) or (5) below assumed by or guaranteed or in
              effect;



          (3) all obligations secured by a mortgage, pledge, lien, encumbrance,
              charge or adverse claim affecting title or resulting in an
              encumbrance to which the property or assets are subject;



          (4) all obligations under interest rate and currency swap agreements,
              cap, floor and collar agreements, spot and forward contracts and
              similar agreements and arrangements; and



          (5) all deferrals or renewals of (1) through (4) above.



     "senior indebtedness" means the principal, premium, if any, and interest,
including bankruptcy interest and fees, and rent payable on all our
indebtedness, whether outstanding on the date of the indenture or thereafter
created, incurred, assumed, guaranteed or in effect guaranteed by us, including
all renewals or extensions.



     However, senior indebtedness shall not include:



          - indebtedness evidenced by the subordinated debt securities,


                                       28
<PAGE>   29


          - indebtedness to any of our subsidiaries, except if it is pledged as
            security for any senior indebtedness,



          - our accounts payable to trade creditors arising in the ordinary
            course of business, and



          - any indebtedness that expressly provides that it shall not be senior
            in right of payment to, or on the same basis with, or is
            subordinated or junior to, the subordinated debt securities.


                                       29
<PAGE>   30


                          DESCRIPTION OF CAPITAL STOCK


     Our authorized capital stock consists of 450,000,000 shares of common
stock, par value $0.01 per share, and 2,000,000 shares of preferred stock, par
value $0.01 per share.


     COMMON STOCK. As of August 7, 1999, there were 147,622,560 shares of common
stock outstanding held by approximately 2,907 holders of record. Each holder of
common stock is entitled to one vote per share on all matters to be voted upon
by the stockholders. Our certificate of incorporation provides that at all
elections of directors, each holder of stock shall be entitled to cumulative
voting. The holder may cast all of these votes for a single candidate or may
distribute them among the number of directors to be elected. Holders of common
stock are entitled to receive dividends declared by the board of directors, out
of funds legally available for the payment of dividends subject to preferences
that may be applicable to the holders of preferred stock. Upon liquidation,
dissolution or winding up of our business, the holders of common stock are
entitled to share equally in all assets available for distribution after payment
of liabilities, subject to prior distribution rights of preferred stock. The
holders of common stock have no preemptive or conversion rights or other
subscription rights. No redemption or sinking fund provisions apply to the
common stock.


     All outstanding shares of common stock are fully paid and nonassessable.


     PREFERRED STOCK. As of August 11, 1999, no shares of preferred stock were
issued and outstanding. The board of directors has the authority to issue the
preferred stock in one or more series and to fix the following rights,
preferences, privileges and restrictions of the preferred stock without further
vote or action by our stockholders:


     - dividend rights and rates,

     - terms of conversion, voting rights, terms of redemption, liquidation
       preferences,

     - the number of shares constituting any series or the designation of such
       series.

Preferred stock could be issued quickly with terms calculated to delay or
prevent a change in control and may adversely affect the voting and other rights
of the holders of common stock. Except in accordance with the rights plan
described below, we have no present plans to issue any shares of preferred
stock.

     PREFERRED SHARES RIGHTS PLAN. On November 16, 1988, our board of directors
authorized a dividend distribution of one share purchase right for each share of
common stock outstanding as of the close of business on December 15, 1988 and
each future share of common stock. The Amended and Restated Preferred Shares
Rights Agreement dated November 20, 1998 between us and BankBoston, N.A., as
rights agent, provides, among other things, that after a distribution date, each
right entitles the registered holder to purchase from us 1/1000 of a share of
our Series A participating preferred stock, $0.01 par value, initially at a
price of $100.00.

     The rights will expire ten years after the date of issuance, or December
15, 2008, unless earlier redeemed, and will become exercisable and transferable
separately from the common stock following the tenth day after a person or
group:

     - acquires beneficial ownership of 20% or more of our common stock,

     - announces a tender or exchange offer, the consummation of which would
       result in ownership by a person or group of 30% or more of our common
       stock, or

                                       30
<PAGE>   31

     - a later date after the occurrence of an event described in clause (i) or
       (ii) above as may be determined by a majority of directors not affiliated
       with the acquiring group or person.

     If (a) an acquiror obtains 30% or more of our common stock, (b) an
acquiring entity combines with us in a transaction in which we are the surviving
company and our common stock remains outstanding and unchanged or (c) we effect
or permit certain "self-dealing" transactions with an owner of 20% or more of
our common stock or its affiliates or associates, then each right will entitle
the holder to purchase, at the then-current purchase price, a number of shares
of common stock having a then-current market value of twice the purchase price.

     If (x) we merge into another entity, (y) an acquiring entity merges into us
and our common stock is changed into or exchanged for other securities or assets
or (z) we sell more than 50% of our assets or earning power, then each right
will entitle the holder to purchase, at the then-current purchase price, a
number of shares of common stock of the person engaging in the transaction
having a then-current market value of twice the purchase price.

     We may redeem the rights at our option for $0.01 per right at any time on
or prior to the tenth day after public announcement that a person or group has
acquired beneficial ownership of 20% or more of our common stock or such later
date as may be determined by a majority of the directors not affiliated with the
acquiring group or person. The rights are also redeemable at our option
following the shares acquisition date if:

     - such redemption is in connection with a consolidation or merger in which
       we are not the surviving corporation,

     - no acquiror has held more than 20% of our common stock for less than the
       last three years, and

     - the redemption is approved by a majority of the directors not affiliated
       with the acquiring group or person.

Our right of redemption may be reinstated if the acquiring person or group
reduces its beneficial ownership to 10% or less of our common stock.

     The Series A participating preferred purchasable upon exercise of the
rights will be nonredeemable and junior to any other series of our preferred
stock. Each share of Series A participating preferred will have a preferential
cumulative quarterly dividend in an amount equal to 1,000 times the dividend
declared on each share of common stock. In the event of liquidation, the holders
of Series A participating preferred will receive a preferred liquidation payment
equal to 1,000 times the aggregate amount to be distributed per share to the
holders of shares of common stock plus accrued dividends. Following payment of
the Series A liquidation preference, and after the holders of shares of common
stock shall have received an amount per share equal to the quotient obtained by
dividing the Series A liquidation preference by 1,000, the holders of Series A
participating preferred and holders of common stock will share ratably and
proportionately the remaining assets to be distributed in liquidation. Each
share of Series A participating preferred Stock will have 1,000 votes and will
vote together with the shares of common stock. In the event of any merger,
consolidation or other transaction in which shares of common stock are exchanged
for or changed into other securities, cash and/or other property, each share of
Series A

                                       31
<PAGE>   32

participating preferred will be entitled to receive 1,000 times the amount and
type of consideration received per share of common stock.

     Although the rights should not interfere with a business combination
approved by the board of directors in the manner set forth in the rights plan,
they may cause substantial dilution to a person or group that attempts to
acquire control without approval by the board.

DELAWARE GENERAL CORPORATION LAW SECTION 203

     We are a Delaware corporation subject to Section 203 of the Delaware
General Corporation Law, an anti-takeover law. In general, Section 203 prohibits
a publicly held Delaware corporation from engaging in a "business combination"
transaction with an "interested stockholder" for a period of three years after
the person became an interested stockholder, unless the business combination or
the transaction in which the person became an interested stockholder is approved
in the manner described below.

     The Section 203 restrictions do not apply if:

     (1) the business combination or transaction is approved by our board of
         directors before the date the interested stockholder obtained the
         status,

     (2) upon consummation of the transaction which resulted in the stockholder
         obtaining the status, the stockholder owned at least 85% of the shares
         of stock entitled to vote in the election of directors, the "voting
         stock". The 85% calculation does not include those shares:

        - owned by directors who are also officers of the target corporation,
          and

        - held by employee stock plans which do not permit employees to decide
          confidentially whether to accept a tender or exchange offer, or

     (3) on or after the date the interested stockholder obtained its status,
         the business combination is approved by our board of directors and at a
         stockholder meeting by the affirmative vote of at least 66 2/3% of the
         outstanding voting stock which is not owned by the interested
         stockholder.

     Generally, a "business combination" includes a merger, asset sale, or other
transaction resulting in a financial benefit to the interested stockholder.
Generally, an "interested stockholder" is a person who, together with affiliates
and associates, owns, or within three years prior to the determination of
interested stockholder status, did own, 15% or more of a corporation's voting
stock. Section 203 may prohibit or delay mergers or other takeover or change in
control attempts with respect to LSI Logic Corporation. As a result, Section 203
may discourage attempts to acquire us even though such transaction may offer our
stockholders the opportunity to sell their stock at a price above the prevailing
market price.

                                       32
<PAGE>   33

CHARTER AND BYLAW PROVISIONS

     Our charter and bylaws include provisions that may have the effect of
discouraging, delaying or preventing a change in control or an unsolicited
acquisition proposal that a stockholder might consider favorable, including a
proposal that might result in the payment of a premium over the market price for
the shares held by stockholders as follows:

     - our charter provides for cumulative voting at all elections of directors,

     - our board has the power to establish the rights, preferences and
       privileges of authorized and unissued shares,

     - our charter limits the liability of our directors, in their capacity as
       directors but not in their capacity as officers, to LSI Logic Corporation
       or its stockholders to the fullest extent permitted by Delaware law.

INDEMNIFICATION ARRANGEMENTS


     Our bylaws provide that our directors, officers and agents shall be
indemnified against expenses, including attorneys' fees, judgments, fines,
settlements actually and reasonably incurred in connection with any proceeding
arising out of their status as such, if such director, officer or agent acted in
good faith and in a manner he or she reasonably believed to be in or not opposed
to the best interests of LSI Logic Corporation, and, with respect to any
criminal action or proceeding, had no reasonable cause to believe such conduct
was unlawful.



     We have entered into agreements to indemnify our directors and officers, in
addition to the indemnification provided for in our Certificate of Incorporation
and Bylaws. These agreements, among other things, indemnify our directors and
officers for certain expenses, including attorney's fees, judgments, fines and
settlement amounts incurred by any such person in any action or proceeding,
including any action by or in the right of LSI, arising out of such person's
services as a director or officer of LSI, any subsidiary of LSI or any other
company or enterprise to which the person provides services at the request of
LSI.


CHANGE OF CONTROL AGREEMENTS

     We have entered into certain severance agreements with each of our
executive officers providing for the acceleration of unvested options held by
such executive officers and the payment of certain lump sum amounts and benefits
upon an involuntary termination at any time within twelve (12) months after a
change of control.

     A "change of control" is defined as

     - the consummation of a merger or consolidation with any other corporation,
       other than a merger or consolidation in which we are the surviving
       entity,

     - the approval by our stockholders of a plan of liquidation or an agreement
       for the sale or disposition by us of all or substantially all of our
       assets, and

     - any person becoming the beneficial owner, as defined in Rule 13d-3 under
       the Securities and Exchange Act of 1934, as amended, of 50% or more of
       our total outstanding voting securities. Our successors shall be bound
       under the change of control severance agreements. The change of control
       severance agreements terminate on November 20, 2003. Although these
       should not interfere with a

                                       33
<PAGE>   34

       business combination, they may cause a substantial dilution to a person
       or group that attempts to acquire us without approval of our board of
       directors.

TRANSFER AGENT AND REGISTRAR

     The transfer agent and registrar for the common stock is Boston EquiServe,
L.P.


                              PLAN OF DISTRIBUTION



     We may sell the securities separately or together:



     - through one or more underwriters or dealers in a public offering and sale
       by them,



     - directly to investors, or



     - through agents.



     We may distribute the securities from time to time in one or more
transactions at a fixed price or prices. These prices may be changed from time
to time and may be set:



     - at market prices prevailing at the times of sale,



     - at prices related to such prevailing market prices, or



     - at negotiated prices.



     We will describe the method of distribution of the securities in the
prospectus supplement.



     Underwriters, dealers or agents may receive compensation in the form of
discounts, concessions or commissions from us or our purchasers (as their agents
in connection with the sale of securities). These underwriters, dealers or
agents may be considered to be underwriters under the Securities Act. As a
result, discounts, commissions, or profits on resale received by the
underwriters, dealers or agents may be treated as underwriting discounts and
commissions. The prospectus supplement will identify any such underwriter,
dealer or agent, and describe any compensation received by them from us. Any
initial public offering price and any discounts or concessions allowed or
reallowed or paid to dealers may be changed from time to time.



     Underwriters, dealers and agents may be entitled to indemnification by us
against certain civil liabilities, including liabilities under the Securities
Act, or to contribution with respect to payments made by the underwriters,
dealers or agents, under agreements between us and the underwriters, dealers and
agents.



     We may grant underwriters who participate in the distribution of securities
an option to purchase additional securities to cover over-allotments, if any, in
connection with the distribution.



     All debt securities will be new issues of securities with no established
trading market. Underwriters involved in the public offering and sale of debt
securities may make a market in the debt securities. However, they are not
obligated to make a market and may discontinue market making activity at any
time. Therefore, we cannot give any assurances to you as to the liquidity of the
trading market for any debt securities.


                                       34
<PAGE>   35


     Underwriters or agents and their associates may be customers of, engage in
transactions with or perform services for us in the ordinary course of business.



                                 LEGAL MATTERS



     The validity of the issuance of our securities offered by this prospectus
will be passed upon for LSI Logic Corporation by Wilson Sonsini Goodrich &
Rosati, Professional Corporation, Palo Alto, California.



                                    EXPERTS



     The financial statements incorporated in this prospectus by reference to
the Annual Report on Form 10-K as amended on Form 10-K/A for the year ended
December 31, 1998 have been so incorporated in reliance on the report of
PricewaterhouseCoopers LLP, independent accountants, given on the authority of
said firm as experts in auditing and accounting.


                                       35
<PAGE>   36

                                    PART II

                   INFORMATION NOT REQUIRED IN THE PROSPECTUS

ITEM 14. OTHER EXPENSES OF ISSUANCE AND DISTRIBUTION

     The aggregate estimated (other than the registration fee) expenses to be
paid by the Registrant in connection with this offering are as follows:


<TABLE>
<S>                                                         <C>
Securities and Exchange Commission registration fee.......  $166,800.00
NASD fees.................................................
Trustee's fees and expenses...............................
Accounting fees and expenses..............................
Legal fees and expenses...................................
Miscellaneous.............................................
                                                            -----------
  Total...................................................  $
                                                            ===========
</TABLE>


ITEM 15. INDEMNIFICATION OF DIRECTORS AND OFFICERS OF LSI

CERTIFICATE OF INCORPORATION

     Article 10 of our Certificate of Incorporation provides that, to the
fullest extent permitted by Delaware law, as the same now exists or may
hereafter be amended, a director shall not be personally liable to the
corporation or its stockholders for monetary damages for breach of fiduciary
duty as a director. Delaware law provides that directors of a corporation will
not be personally liable for monetary damages for breach of their fiduciary
duties as directors, except for liability:

     - for any breach of their duty of loyalty to the corporation or its
       stockholders,

     - for acts or omissions not in good faith or that involve intentional
       misconduct or a knowing violation of law,

     - for unlawful payments of dividends or unlawful stock repurchases or
       redemptions as provided in Section 174 of the Delaware General
       Corporation Law, or

     - for any transaction from which the director derived an improper personal
       benefit.

BYLAWS

INDEMNIFICATION ARRANGEMENTS


     Our bylaws provide that our directors, officers and agents shall be
indemnified against expenses including attorneys' fees, judgments, fines,
settlements actually and reasonably incurred in connection with any proceeding
arising out of their status as such, if such director, officer or agent acted in
good faith and in a manner he or she reasonably believed to be in or not opposed
to the best interests of LSI Logic Corporation, and, with respect to any
criminal action or proceeding, had no reasonable cause to believe such conduct
was unlawful.


     We have entered into agreements to indemnify our directors and officers, in
addition to the indemnification provided for in our Certificate of Incorporation
and Bylaws. These agreements, among other things, indemnify our directors and
officers for certain expenses, including attorney's fees, judgments, fines and
settlement amounts incurred by any such

                                      II-1
<PAGE>   37

person in any action or proceeding, including any action by or in the right of
LSI, arising out of such person's services as a director or officer of LSI, any
subsidiary of LSI or any other company or enterprise to which the person
provides services at the request of LSI.

ITEM 16. EXHIBITS

     The following exhibits are filed herewith or incorporated by reference
herein:


<TABLE>
<CAPTION>
    EXHIBIT
    NUMBER                            EXHIBIT TITLE
    -------                           -------------
    <C>        <S>
      1.1      Form of Underwriting Agreement for Common Stock.*
      1.2      Form of Underwriting Agreement for Debt Securities.*
      3.1      Amended and Restated Certificate of Incorporation.(1)
      3.2      Bylaws.(2)
      4.1      Form of Senior Indenture.*
      4.2      Form of Subordinated Indenture.*
      4.3      Form of Senior Debt Security (included in Exhibit 4.1).*
      4.4      Form of Subordinated Debt Security (included in Exhibit
               4.2).*
      5.1      Opinion of Wilson Sonsini Goodrich & Rosati, Professional
               Corporation.*
     12.1      Computation of Ratio of Earnings to Fixed Charges.
     23.1      Consent of PricewaterhouseCoopers LLP, independent
               accountants.
     23.2      Consent of Wilson Sonsini Goodrich & Rosati, Professional
               Corporation (included in Exhibit 5.1).*
     24.1      Power of Attorney of certain directors and officers of LSI
               Logic Corporation (see page II-4 of the initial filing of
               this Form S-3).**
     25.1      Form T-1 Statement of Eligibility of Trustee for Senior
               Indenture under the Trust Indenture Act of 1939.*
     25.2      Form T-1 Statement of Eligibility of Trustee for
               Subordinated Indenture under the Trust Indenture Act of
               1939.*
     27.1      Financial Data Schedule.*
</TABLE>


- ------------------------

 *  To be filed by amendment or as an exhibit to Form 8-K.



**  Previously filed.


(1) Incorporated by reference to exhibits filed with the Registrant's
    Registration Statement on Form S-8 (No. 333-57563) filed June 24, 1998

(2) Incorporated by reference to exhibits filed with the Registrant's Quarterly
    Report on Form 10-Q for the quarter ended June 26, 1998.


ITEM 17. UNDERTAKINGS


     The undersigned Registrant hereby undertakes:

     (1) To file, during any period in which offers or sales are being made, a
post-effective amendment to this Registration Statement:

          (a) To include any prospectus required by Section 10(a)(3) of the
     Securities Act,

          (b) To reflect in the prospectus any facts or events arising after the
     effective date of the registration statement (or the most recent
     post-effective amendment thereof) which, individually or in the aggregate,
     represent a fundamental change in

                                      II-2
<PAGE>   38

     the information set forth in the Registration Statement. Notwithstanding
     the foregoing, any increase or decrease in volume of securities offered (if
     the total dollar value of securities offered would not exceed that which
     was registered) and any deviation from the low or high end of the estimated
     maximum offering range may be reflected in the form of prospectus filed
     with the Commission pursuant to Rule 424(b) if, in the aggregate, the
     changes in volume and price represent no more than a 20 percent change in
     the maximum aggregate offering price set forth in the "Calculation of
     Registration Fee" table in the effective registration statement,

          (c) To include any material information with respect to the plan of
     distribution not previously disclosed in the Registration Statement or any
     material change to such information in the Registration Statement;

provided, however, that clauses (a) and (b) do not apply if the information
required to be included in a post-effective amendment by such clauses is
contained in periodic reports filed with or furnished to the Securities and
Exchange Commission by the Registrant pursuant to Section 13 or Section 15(d) of
the Securities Exchange Act of 1934 (the "Exchange Act") that are incorporated
by reference in the Registration Statement.

     (2) That, for the purpose of determining any liability under the Securities
         Act, each such post-effective amendment shall be deemed a new
         registration statement relating to the securities offered therein, and
         the offering of such securities at that time shall be deemed to be the
         initial bona fide offering thereof.

     (3) To remove from registration by means of a post-effective amendment any
         of the securities being registered which remain unsold at the
         termination of the offering.

     (4) That, for purposes of determining any liability under the Securities
         Act, each filing of the Registrant's annual report pursuant to Section
         13(a) or Section 15(d) of the Exchange Act that is incorporated by
         reference in this Registration Statement shall be deemed to be a new
         registration statement relating to the securities offered therein, and
         the offering of such securities at that time shall be deemed to be the
         initial bona fide offering thereof.

     Insofar as indemnification for liabilities arising under the Securities Act
may be permitted to directors, officers and controlling persons of the
Registrant pursuant to the provisions described under Item 15 above, or
otherwise, the Registrant has been advised that in the opinion of the Securities
and Exchange Commission such indemnification is against public policy as
expressed in the Securities Act and is, therefore, unenforceable. In the event
that a claim for indemnification against such liabilities, other than the
payment by the Registrant of expenses incurred or paid by a director, officer or
controlling person of the Registrant in the successful defense of any action,
suit or proceeding, is asserted by such director, officer or controlling person
in connection with the securities being registered, the Registrant will, unless
in the opinion of its counsel the matter has been settled by controlling
precedent, submit to a court of appropriate jurisdiction the question whether
such indemnification by it is against public policy as expressed in the
Securities Act and will be governed by the final adjudication of such issue.

     The undersigned Registrant hereby undertakes that:

     (1) For purposes of determining any liability under the Securities Act of
         1933, the information omitted from the form of prospectus filed as part
         of this registration statement in reliance upon Rule 430A and contained
         in a form of prospectus filed

                                      II-3
<PAGE>   39

         by the registrant pursuant to Rule 424(b)(1) or (4) or 497(h) under the
         Securities Act shall be deemed to be part of this registration
         statement as of the time it was declared effective.

     (2) For the purpose of determining any liability under the Securities Act
         of 1933, each post-effective amendment that contains a form of
         prospectus shall be deemed to be a new registration statement relating
         to the securities offered therein, and the offering of such securities
         at that time shall be deemed to be the initial bona fide offering
         thereof.

                                      II-4
<PAGE>   40


                                   SIGNATURES



     Pursuant to the requirements of the Securities Act, the Registrant
certifies that it has reasonable grounds to believe that it meets all of the
requirements for filing on Form S-3 and has duly caused this Amendment No. 1 to
the Registration Statement on Form S-3 to be signed on its behalf by the
undersigned, thereunto duly authorized, in the City of Milpitas, State of
California, on August 11, 1999.


                                       LSI LOGIC CORPORATION

                                       By:      /s/ WILFRED J. CORRIGAN
                                          --------------------------------------
                                           Name: Wilfred J. Corrigan
                                           Title: Chairman, Chief Executive
                                                  Officer and Director


     Pursuant to the requirements of the Securities Act, this Amendment No. 1 to
the Registration Statement has been signed by the following persons in the
capacities and on the dates indicated.



<TABLE>
<CAPTION>
                        NAME                                  TITLE              DATE
                        ----                                  -----              ----
<C>                                                    <S>                  <C>
               /s/ WILFRED J. CORRIGAN                 Chairman, Chief      August 11, 1999
- -----------------------------------------------------  Executive Officer
                 Wilfred J. Corrigan                   and Director
                                                       (Principal
                                                       Executive Officer)

                          *                            Executive Vice       August 11, 1999
- -----------------------------------------------------  President, Chief
                  R. Douglas Norby                     Financial Officer
                                                       and Director
                                                       (Principal
                                                       Financial Officer
                                                       and Principal
                                                       Accounting Officer)

                          *                            Director             August 11, 1999
- -----------------------------------------------------
                      T.Z. Chu

                          *                            Director             August 11, 1999
- -----------------------------------------------------
                  Malcolm R. Currie

                          *                            Director             August 11, 1999
- -----------------------------------------------------
                   James H. Keyes

                          *                            Director             August 11, 1999
- -----------------------------------------------------
                 Matthew J. O'Rourke

            *By: /s/ WILFRED J. CORRIGAN
  ------------------------------------------------
                 Wilfred J. Corrigan
                  Attorney-in-Fact
</TABLE>


                                      II-5
<PAGE>   41


                                 EXHIBIT INDEX



<TABLE>
<CAPTION>
EXHIBIT
NUMBER                            EXHIBIT TITLE
- -------                           -------------
<C>        <S>
  1.1      Form of Underwriting Agreement for Common Stock.*
  1.2      Form of Underwriting Agreement for Debt Securities.*
  3.1      Amended and Restated Certificate of Incorporation.(1)
  3.2      Bylaws.(2)
  4.1      Form of Senior Indenture.*
  4.2      Form of Subordinated Indenture.*
  4.3      Form of Senior Debt Security (included in Exhibit 4.1).*
  4.4      Form of Subordinated Debt Security (included in Exhibit
           4.2).*
  5.1      Opinion of Wilson Sonsini Goodrich & Rosati, Professional
           Corporation.*
 12.1      Computation of Ratio of Earnings to Fixed Charges.
 23.1      Consent of PricewaterhouseCoopers LLP, independent
           accountants.
 23.2      Consent of Wilson Sonsini Goodrich & Rosati, Professional
           Corporation (included in Exhibit 5.1).*
 24.1      Power of Attorney of certain directors and officers of LSI
           Logic Corporation (see page II-4 of the initial filing of
           this Form S-3).**
 25.1      Form T-1 Statement of Eligibility of Trustee for Senior
           Indenture under the Trust Indenture Act of 1939.*
 25.2      Form T-1 Statement of Eligibility of Trustee for
           Subordinated Indenture under the Trust Indenture Act of
           1939.*
 27.1      Financial Data Schedule.*
</TABLE>


- -------------------------

 * To be filed by amendment or as an exhibit to Form 8-K.



** Previously filed.


(1) Incorporated by reference to exhibits filed with the Registrant's
    Registration Statement on Form S-8 (No. 333-57563) filed June 24, 1998.

(2) Incorporated by reference to exhibits filed with the Registrant's Quarterly
    Report on Form 10-Q for the quarter ended June 26, 1998.

<PAGE>   1

                  REGISTRATION UNDER THE SECURITIES ACT OF 1933
                       RATIO OF EARNINGS TO FIXED CHARGES

                                                                    EXHIBIT 12.1

                              LSI LOGIC CORPORATION
                COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES
                        (Amounts in millions of dollars)

<TABLE>
<CAPTION>
                                                                                                           Six Months Ended
                                                     Fiscal Year Ended December 31,                            June 30,
                                      ------------------------------------------------------------        ------------------
                                       1994         1995         1996          1997          1998          1998        1999
                                      ------       ------       ------        ------        ------        ------      ------
<S>                                   <C>          <C>          <C>           <C>           <C>           <C>         <C>
Pre-tax income (loss)
    from continuing operations
    before adjustment for
    minority interests in
    consolidated subsidiaries
    or income or loss from
    equity investees                  $150.6       $335.5       $208.4        $228.0       $(129.6)       $ 83.7      $ 23.0


Add: Amortization of
    capitalized interest                 2.0          2.0          1.0           2.0           1.4           0.6         1.4

Less: Interest capitalized                --           --         (2.0)         (5.0)        (11.4)         (1.5)         --

                                      ------       ------       ------        ------        ------        ------      ------
Subtotal                              $152.6       $337.5       $207.4        $225.0       $(139.6)       $ 82.8      $ 24.4
                                      ======       ======       ======        ======        ======        ======      ======

Fixed charges:
    Interest expensed and
    capitalized and
    amortization of debt
    discount and premium
    on all indebtedness               $ 19.9       $ 17.0       $ 16.8        $  7.9        $ 21.0        $  1.9      $ 20.4

    Rental                              12.8         15.3         16.6          15.6          15.4           7.8        12.4


                                      ------       ------       ------        ------        ------        ------      ------
    Total fixed charges               $ 32.7       $ 32.3       $ 33.4        $ 23.5        $ 36.4        $  9.7      $ 32.8
                                      ======       ======       ======        ======        ======        ======      ======

Pre-tax income (loss) from
    continuing operations
    before adjustment for
    minority interests in
    consolidated subsidiaries
    or income or loss from
    equity investees plus
    fixed charges and
    amortization of capitalized
    interest, less interest
    capitalized                       $185.3       $369.8       $240.8        $248.5        $(103.2)      $ 92.5      $ 57.2


Ratio of earnings to                  ------       ------       ------        ------        ------        ------      ------
    fixed charges                        5.7         11.4          7.2          10.6            --           9.5         1.7
                                      ======       ======       ======        ======        ======        ======      ======
</TABLE>


<PAGE>   1


                                                                    EXHIBIT 23.1



                       CONSENT OF INDEPENDENT ACCOUNTANTS



     We hereby consent to the incorporation by reference in this Registration
Statement on Form S-3 of our report dated February 22, 1999 except as to the
pooling of interests with SEEQ Technology Inc. which is as of June 22, 1999,
which appears on page 60 of LSI Logic Corporation's Annual Report on 10-K/A for
the year ended December 31, 1998. We also consent to the reference to us under
the heading "Experts" in such Registration Statement.


/s/ PRICEWATERHOUSECOOPERS LLP

San Jose, California

August 11, 1999



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