PMC SIERRA INC
S-3/A, 1999-09-23
SEMICONDUCTORS & RELATED DEVICES
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      As filed with the Securities and Exchange Commission on September 23, 1999
                                                       Registration No.333-86951
================================================================================
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                 AMENDMENT NO. 1
                                       TO
                                    FORM S-3
                             REGISTRATION STATEMENT
                                      Under
                           The Securities Act of 1933

                                PMC-SIERRA, INC.
             (Exact name of Registrant as specified in its charter)

                          8555 Baxter Place, Suite 105
                            Burnaby, British Columbia
                                 Canada, V5A 4V7
                                 (604) 415-6000


               Delaware                                            94-2925073
      (State or other jurisdiction of                           (I.R.S. Employer
       incorporation or organization)                     Identification Number)

       (Address,  including zip code, and telephone number, including area code,
of Registrant's principal executive offices)


                          The Corporation Trust Company
                               1209 Orange Street
                           Wilmington, Delaware 19801

                (Name, address, including zip code, and telephone number,
                   including area code, of agent for service)

                                    Copy to:

                                   Neil Wolff
                        Wilson Sonsini Goodrich & Rosati
                            Professional Corporation
                               650 Page Mill Road
                               Palo Alto, CA 94304
                                  (415) 493-9300

         APPROXIMATE DATE OF COMMENCEMENT OF PROPOSED SALE TO 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,  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 (the  "Securities  Act"),  other than securities  offered
only in connection with dividend or interest  reinvestment  plans,  please check
the following box. [____]

   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 the  Registration  Statement  shall become
effective on such date as the Commission,  acting pursuant to said Section 8(a),
may determine.


<PAGE>

- --------------------------------------------------------------------------------
Information   contained  herein  is  subject  to  completion  or  amendment.   A
registration  statement  relating  to these  securities  has been filed with the
Securities  and Exchange  Commission.  These  securities may not be sold nor may
offers to buy be accepted prior to the time the registration  statement  becomes
effective.  This  prospectus  shall  not  constitute  an  offer  to  sell or the
solicitation of an offer to buy nor shall there be any sale of these  securities
in any State in which such offer,  solicitation  or sale would be unlawful prior
to registration or qualification under the securities laws of any such State.
- --------------------------------------------------------------------------------


                              SUBJECT TO COMPLETION

                                PMC-SIERRA, INC.

                        3,597,123 SHARES OF COMMON STOCK

         We are  offering  up to  3,597,123  shares of our common  stock held by
several selling  stockholders  listed on page 4 of this  prospectus.  The shares
were issued or became issuable to the selling stockholders on August 27, 1999 by
virtue of the merger of a subsidiary of PMC-Sierra,  Inc., with and into Abrizio
Inc., a California  corporation.  The issuance of the shares was exempt from the
registration requirements of the Securities Act of 1933.

         The 3,597,123 shares consist of:

                - 87,290  shares of PMC common stock  issuable  upon exercise of
warrants by selling  stockholders  identified  on page 4 of this  prospectus.

                -  3,509,833   shares  of  PMC  common  stock  held  by  selling
stockholders listed on page 4 of this prospectus.

         The selling  stockholders  may sell or  distribute  the shares  through
underwriters,  dealers,  brokers or other  agents,  or  directly  to one or more
purchasers.  The price may be the market price prevailing at the time of sale or
a price privately negotiated.

         We will not  receive any of the  proceeds  from the sale of the shares.
However, we will pay substantially all expenses incident to their registration.


         Our common  stock is quoted on the  Nasdaq  National  Market  under the
symbol "PMCS." On September 22, 1999, the last reported sale price of our common
stock was $99.81 per share.


          INVESTING  IN OUR COMMON  STOCK  INVOLVES A HIGH  DEGREE OF RISK.  SEE
"RISK FACTORS" LOCATED ON PAGE 3 OF THIS PROSPECTUS.


          NEITHER  THE  SECURITIES   AND  EXCHANGE   COMMISSION  NOR  ANY  STATE
SECURITIES  COMMISSION  HAS APPROVED OR  DISAPPROVED  THE PMC COMMON STOCK TO BE
ISSUED IN CONNECTION WITH THIS PROSPECTUS OR DETERMINED  WHETHER THIS PROSPECTUS
IS  ACCURATE  OR  COMPLETE.  ANY  REPRESENTATION  TO THE  CONTRARY IS A CRIMINAL
OFFENSE.


                 The date of this prospectus is _________, 1999


<PAGE>


         YOU SHOULD RELY ONLY ON  INFORMATION  OR  REPRESENTATIONS  CONTAINED OR
INCORPORATED  BY REFERENCE IN THIS  PROSPECTUS.  NO ONE HAS BEEN  AUTHORIZED  TO
PROVIDE YOU WITH ANY DIFFERENT INFORMATION.

         Our  business  and  affairs  may  change  following  the  date  of this
prospectus.  We do not have an  obligation  to update  the  information  in this
prospectus after the date on the cover page.

                       WHERE YOU CAN FIND MORE INFORMATION

         PMC files annual,  quarterly and current reports, proxy and information
statements and other  information  with the Securities and Exchange  Commission.
You can inspect and copy these  reports,  proxy and  information  statements and
other information concerning PMC at the Commission's public reference facilities
at Room  1024,  450 Fifth  Street,  N.W.,  Washington,  D.C.  20549;  and at the
Commission's  regional offices at Suite 1400, 500 West Madison Street,  Chicago,
Illinois  60661  and  Seven  World  Trade  Center,  New  York,  New York  10048.
Information  on the  operation  of the Public  Reference  Room is  available  by
calling the Commission at  1-800-SEC-0330.  The SEC also maintains a site on the
World  Wide  Web  at  http://www.sec.gov   that  contains  reports,   proxy  and
information statements and other information about PMC.

         This prospectus is part of the Registration  Statement on Form S-3 that
PMC filed with the  commission  to  register  shares of its common  stock.  This
prospectus does not contain all of the information contained in the Registration
Statement.   Parts  of  documents  are   incorporated  by  reference  into  this
prospectus.  You should  read these  documents  in their  entirety  rather  than
relying just on the parts incorporated by reference. Some of these documents are
exhibits to the Registration Statement. The Registration Statement together with
its exhibits can be inspected and copied at the public reference  facilities and
regional offices of the Commission referred to above.

                 INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE

         The  following  documents,  which  have  been  filed  by PMC  with  the
Commission  pursuant to the Exchange Act, are incorporated by reference and made
a part of this prospectus:

         1.    PMC's  Annual  Report  on Form  10-K for the  fiscal  year  ended
               December 27, 1998;

         2.    the  Proxy   Statement   for  PMC's   1999   Annual   Meeting  of
               Stockholders;

         3.    PMC's Quarterly Reports on Form 10-Q for the quarters ended March
               28, 1999 and June 27, 1999;

         4.    PMC's  Current  Reports  on Form 8-K dated  August  25,  1999 and
               September 3, 1999.

         5.    the  description  of our common stock in our Quarterly  Report on
               10-Q for the quarter ended June 27, 1999; and

         6.    all reports,  definitive  proxy  statements  and other  documents
               filed by PMC with  the  Commission  pursuant  to  Section  13(a),
               13(c),  14 or 15(d) of the Exchange Act subsequent to the date of
               this prospectus and prior to the termination of this offering.

         Any  statement  in this  prospectus  incorporated  by reference is only
incorporated  to the extent  that other  statements  in this  prospectus  do not
modify or supersede it.

<PAGE>


         You may request a copy of any and all of the  documents or  information
referred  to above that has been or may be  incorporated  by  reference  in this
prospectus  (excluding  exhibits  to such  documents  unless such  exhibits  are
specifically incorporated by reference).  Requests should be directed in writing
or by phone to:

                                PMC-Sierra, Inc..
                               Investor Relations
                          8555 Baxter Place, Suite 105
                            Burnaby, British Columbia
                                 Canada V5A 4V7
                        Telephone Number: (604) 415-6000

PMC will provide these documents and information to you without charge.

                                   THE COMPANY

         PMC  was   incorporated   in  the  State  of  California  in  1983  and
reincorporated into the State of Delaware in 1997. All references to "PMC", "we"
or "us" are to PMC-Sierra, Inc. and include its subsidiaries, unless the context
requires otherwise. Our principal executive office is located at 105-8555 Baxter
Place,  Burnaby,  B.C., Canada V5A 4V7. Our telephone number at that location is
(604) 415-6000.  Our Common Stock trades on the Nasdaq National Market under the
symbol "PMCS."

         We design, develop, market and support  high-performance  semiconductor
networking  solutions.  Our products are used in the high speed transmission and
networking   systems   which  are  being   used  to   restructure   the   global
telecommunications and data communications infrastructure.

         We provide components for equipment based on Asynchronous Transfer Mode
("ATM"), Synchronized Optical Network ("SONET"),  Synchronized Digital Hierarchy
("SDH"),  T1/E1/J1 and T3/E3/J2 access transmission and Ethernet protocols.  Our
networking  products  adhere  to  international  standards  and are  sold on the
merchant  market to over 100 customers  either directly or through our worldwide
distribution channels.

                   SPECIAL NOTE ON FORWARD-LOOKING STATEMENTS

         Some  statements  and   information  in  this   prospectus   constitute
"forward-looking  statements" within the meaning of the federal securities laws.
Our results, performance, or achievements may be materially different from those
expressed or implied by such forward-looking  statements.  We may not nor are we
obligated  to,  release  revisions  to  forward-looking  statements  to  reflect
subsequent events.

                                  RISK FACTORS

         An investment in the shares involves a high degree of risk. In addition
to the other  information  contained in this prospectus,  before  purchasing the
shares,  prospective  investors  should  carefully  consider  the  risk  factors
described as "Factors That You Should Consider  Before  Investing In PMC-Sierra"
in our Quarterly Report on Form 10-Q for the quarter ended June 27, 1999.

                                 USE OF PROCEEDS

         We will not receive any proceeds from the sale of the shares covered by
this prospectus. We will, however, pay substantially all expenses related to the
registration of the shares.
<PAGE>


                              SELLING STOCKHOLDERS


         The name of each selling stockholder and the aggregate number of shares
of common stock  registered  by this  Registration  Statement  that each selling
stockholder  may  offer  and sell are set out in the table on page 4. All of the
shares  offered  are issued and  outstanding  as of the date of this  prospectus
other than 87,290  shares of common stock  issuable upon exercise of warrants by
selling  stockholders  identified  in the table on page 4.  Because  the selling
stockholders  may sell or distribute  all or a portion of the shares at any time
and from time to time after the date of this prospectus,  we cannot estimate the
number of shares of common  stock that each  selling  stockholder  may have upon
completion of this offering.  As of the date of this  prospectus,  the following
selling stockholders serve as employees or consultants of Abrizio:

- -  Anders Swahn
- -  Nick McKeown
- -  Shang-Tse Chuang
- -  Gregory Charles Adam Watson
- -  Constantine Calamvokis
- -  Rolf Muralt
- -  Steven C. Lin
- -  Saroj Behera
- -  Leo Quilici
- -  Zubair Hussain
- -  Gireesh Shrimali


<PAGE>



                                                    Shares to be Offered for the
  Selling Stockholder                                       Selling Stockholder
- --------------------------------------------------------------------------------
  Anders Swahn                                                632,145

  Nick McKeown                                                632,145

  Stanford University                                          58,699

  Frank Marshall                                                9,482

  Fenwick & West LLP                                            7,525

  Shang-Tse Chuang                                             11,128

  Gregory Charles Adam Watson                                  11,852

  Constantine Calamvokis and Alison Lang,                       7,901
  Community Property

  Rolf Muralt                                                   6,848

  Steven C. Lin and Robin A. Lin, Community Property            6,848

  Saroj Behera                                                 22,125

  Leo Quilici                                                   9,218

  Zubair Hussain                                               34,767

  Gireesh Shrimali                                              4,741

  Benchmark Capital                                           903,064

  Sequoia Capital VIII                                        818,446

  Sequoia International Technology Partners VIII               10,385

  Sequoia International Technology Partners VIII (Q)           54,183

  CMS Partners LLC                                             18,061

  Sequoia 1997                                                  1,987

  F&W Investments 1998                                          7,675

  Michael Dowling                                                 601

  Soleil Moscona                                                4,515

  Dorothy Keggi                                                 3,010

  Jim Salvatore                                                 3,010

  Patrick A. McKeown                                            2,257

  Jeremy P. McKeown                                             1,354

  Alistair J. McKeown                                             903

  Hanh V. Le and Thien-Hoa T. Truong                            2,408

  Dew T. Le and Michael F. Dawson                                 903

  Nho T.T. LeHinds and Roger E. LeHinds                           451

  Sean Nhan                                                       903

  Trang T. Rowe and David Rowe                                  1,053

  Nga T. Le and Mark S. Wolter                                  1,053
<PAGE>

  Allied Telesis KK (1)                                        30,808

  Timark LP                                                    52,978

  Leo P. Quilici Pension and Profit                            13,829
  Sharing Plan dated 12/28/90 (2)

  Hennessy 1993 Revocable Trust (3)                            18,353

  Ron Schmidt  (4)                                             45,883

  Reed Hastings (5)                                            45,883

  Morgan Littlewood (6)                                        22,941

  Carmelo Santoro, Trustee, The Carmelo J.
  and Nancy J. Santoro Family Trust, July 13, 1990             52,226

  VLLI (7)                                                     22,576

      TOTAL                                                 3,597,123
      -------------------------------------------------------------------------
      1 Includes  15,050 shares  issuable upon exercise of warrants.
      2 Includes  6,019 shares  issuable upon  exercise of warrants.
      3 Includes  6,020 shares  issuable upon  exercise of warrants.
      4 Includes  15,050 shares  issuable upon exercise of warrants.
      5 Includes  15,050 shares  issuable upon exercise of warrants.
      6 Includes  7,525 shares  issuable upon  exercise of warrants.
      7 Includes 22,576 shares issuable upon exercise of warrants.


                              PLAN OF DISTRIBUTION

         The shares may be sold or  distributed  from time to time by or for the
account  of  the  selling  stockholders.   The  selling  stockholders  will  act
independently of PMC in making decisions with respect to these sales.


         The selling  stockholders  may use  underwriters,  dealers,  brokers or
other  agents  to  sell or  distribute  some or all of the  shares  or may  deal
directly  with one or more  purchasers.  They may use block sales,  Nasdaq,  the
over-the-counter  market,  privately negotiated transactions or a combination of
these.  These  sales may be at the market  price at the time of sale,  at prices
related to the market price, at privately negotiated prices, or at fixed prices,
which may be changed. Brokers, dealers, agents or underwriters  participating in
these  sales  as  agent  may  receive  compensation  in the  form of  discounts,
concessions or commissions  from the selling  stockholders. If they act as agent
for the purchaser of such shares,  they may also receive  compensation  from the
purchaser.

         The selling  stockholders  and any  underwriters,  brokers,  dealers or
agents  that   participate  in   distribution   of  the  shares  may  be  deemed
"underwriters"  within the meaning of the  Securities  Act,  and any  discounts,
commissions  or  concessions  they  receive  might be deemed to be  underwriting
discounts and commissions  under the Securities Act. Neither PMC nor the selling
stockholders can presently  estimate the amount of such  compensation.  PMC does
not know of any existing  arrangements  relating to the sale or  distribution of
the shares among any selling  stockholders  or between any selling  stockholders
and any underwriter, broker, dealer or other agent.

<PAGE>


         Compliance  with the Exchange Act may affect the  marketability  of our
common  stock.  The  Exchange  Act  does  not  allow  any  person  engaged  in a
distribution of any of the shares to simultaneously  engage in market activities
with  respect  to our other  common  stock for nine  business  days prior to the
commencement of the distribution.  In addition, the selling stockholders will be
subject to other applicable  provisions of the Exchange Act,  including  without
limitation Rules 10b-5,  10b-6 and 10b-7, that may limit the timing of purchases
and sales of any of the shares.

         PMC will pay  substantially all of the expenses of this offering of the
shares by the selling  stockholders  other than  commissions  and  discounts  of
underwriters, brokers, dealers or agents.

                                  LEGAL MATTERS

         The validity of the shares  offered  hereby will be passed upon for PMC
by Wilson Sonsini Goodrich & Rosati, Professional Corporation.

                                     EXPERTS

         The consolidated  financial statements of PMC-Sierra,  Inc. at December
31, 1998, for the two years in the period then ended,  and at December 31, 1997,
appearing in this  prospectus  and  Registration  Statement have been audited by
Deloitte & Touche LLP, independent auditors, and for the year ended December 31,
1996,  by  Ernst & Young  LLP,  independent  auditors,  as  described  in  their
respective reports. The financial  statements,  as described in the reports, are
incorporated  by reference in this  prospectus  in reliance on the  authority of
these firms as experts in accounting and auditing.



<PAGE>

                                     PART II

                     INFORMATION NOT REQUIRED IN PROSPECTUS

ITEM 14.  OTHER EXPENSES OF ISSUANCE AND DISTRIBUTION.

         The following  table sets forth the expenses  payable by the Registrant
in connection with the filing of this Registration Statement (1).

Securities and Exchange Commission Filing Fee                    $93,060

Nasdaq Additional Listing Fee                                    $17,500

Printing and Engraving Expenses                                  $10,000

Legal Fees and Expenses                                          $15,000

Accounting Fees and Expenses                                       -

Blue Sky Fees and Expenses                                         -

Transfer Agent and Registration Fees                              $5,000

Miscellaneous expenses                                            $1,440

Total                                                           $142,000

      ---------------------------------------------
      (1) All of such expenses, other than the filing fee for the Commission and
      additional listing fee for Nasdaq, are estimates and are subject to future
      contingencies.


ITEM 15.  INDEMNIFICATION OF DIRECTORS AND OFFICERS.

         The  Certificate  of  Incorporation  of PMC eliminates the liability of
directors to PMC for monetary damages for breach of fiduciary duty as a director
to the  fullest  extent  permissible  under  Delaware  law,  as such law  exists
currently  or as it may be amended  in the  future.  Under  Delaware  law,  such
provision  may not  eliminate  or limit  director  monetary  liability  for: (a)
breaches of the director's duty of loyalty to PMC or its stockholders;  (b) acts
or omissions  not in good faith or involving  intentional  misconduct or knowing
violations  of law;  (c) the payment of  unlawful  dividends  or unlawful  stock
repurchases or redemptions;  or (d) transactions in which the director  received
an improper personal benefit.  Such limitation of liability  provisions also may
not limit a director's  liability for violation of, or otherwise  relieve PMC or
its directors from the necessity of complying with,  federal or state securities
laws, or affect the  availability  of  non-monetary  remedies such as injunctive
relief or rescission.

         PMC's  Bylaws  provide  that PMC  shall  indemnify  its  directors  and
officers and may indemnify its employees and other agents to the fullest  extent
permitted by law. PMC believes that  indemnification  under its Bylaws covers at
least negligence and gross negligence on the part of indemnified parties.  PMC's
Bylaws also permit PMC to secure  insurance on behalf of any officer,  director,
employee or other agent for any  liability  arising out of his or her actions in
such  capacity,  regardless of whether PMC would have the power to indemnify him
or her against such liability under the General Corporation Law of Delaware. PMC
currently has secured such insurance on behalf of its officers and directors.

         PMC  has  entered  into  agreements  to  indemnify  its  directors  and
officers, in addition to indemnification  provided for in PMC's Bylaws.  Subject
to certain  conditions,  these agreements,  among other things,  indemnify PMC's
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 PMC,  arising
out of such person's services as a director or officer of PMC, any subsidiary of
PMC or any other company or enterprise to which the person provides  services at
the request of PMC.
<PAGE>

ITEM 16.  EXHIBITS

         The  following   exhibits  are  filed  as  part  of  this  Registration
Statement:


NUMBER        EXHIBIT DESCRIPTION

5.1           Opinion of Counsel as to the validity of the Shares.
23.1          Consent of Counsel (included in Exhibit 5.1 above).
23.2          Consent of Ernst & Young LLP.
23.3          Consent of Deloitte & Touche LLP.


ITEM 17.  UNDERTAKINGS.

(a)     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:

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

                (ii) To reflect in the  prospectus  any facts or events  arising
                after the effective date of this Registration  Statement (or the
                most   recent    post-effective    amendment   thereof)   which,
                individually or in the aggregate, represent a fundamental change
                in the  information  set forth in this  Registration  Statement;

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

         Provided,  however,  that paragraphs  (a)(1)(i) and (a)(1)(ii) above do
not  apply  if the  information  required  to be  included  in a  post-effective
amendment by these  paragraphs  is contained in periodic  reports  filed with or
furnished by the Registrant  pursuant to Section 13 or 15(d) of the Exchange Act
that are incorporated by reference in this Registration Statement.


         (2) That,  for the  purpose  of  determining  any  liability  under the
Securities Act, each such  post-effective  amendment shall be deemed to be a new
registration  statement  relating  to the  securities  offered  herein,  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
this  offering.


(b)    The  undersigned  Registrant  hereby  undertakes  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 herein, and the offering of such securities at that time shall be deemed
to be the initial bona fide offering thereof.

<PAGE>


(c)    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 foregoing  provisions,  or otherwise,  the Registrant
has been advised that in the opinion of the 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.


<PAGE>


                                   SIGNATURES


         Pursuant  to the  requirements  of the  Securities  Act  of  1933,  the
Registrant has duly caused this Amendment No. 1 to its Registration Statement to
be signed  on its  behalf  by the  undersigned,  thereunto  duly  authorized  in
Burnaby, British Columbia, Canada on this 23rd day of September 1999.


                                       PMC-SIERRA, INC.
                                       By: /s/JOHN SULLIVAN
                                       ----------------------------------------
                                       John Sullivan
                                       Vice President, Finance
                                       (Principal Financial and Accounting
                                       Officer)


Signature                           Title                            Date

/s/ ROBERT L. BAILEY*      President, Chief Executive         September 23, 1999
- --------------------       Officer (Principal Executive
Robert L. Bailey           Officer) and Director

/s/JOHN SULLIVAN           Vice President, Finance            September 23, 1999
- ----------------           (Principal Financial
John Sullivan              and Accounting Officer)

/s/ALEXANDRE BALKANSKI*    Director                           September 23, 1999
- ----------------------
Alexandre Balkanski


/s/COLIN BEAUMONT*         Director                           September 23, 1999
- -----------------
Colin Beaumont

/s/JAMES V. DILLER*        Chairman of the Board              September 23, 1999
- ------------------         of Directors
James V. Diller

/s/FRANK J. MARSHALL*      Director                           September 23, 1999
- --------------------
Frank J. Marshall



*By: /s/JOHN SULLIVAN
- ---------------------
John Sullivan
Attorney-in-Fact




<PAGE>

                                  EXHIBIT INDEX


NUMBER           EXHIBIT DESCRIPTION

5.1              Opinion of Counsel as to the validity of the Shares.

23.2             Consent of Ernst & Young LLP

23.3             Consent of Deloitte & Touche LLP





                               650 PAGE MILL ROAD
                        PALO ALTO, CALIFORNIA 94304-1050
                  TELEPHONE 650-493-9300 FACSIMILE 650-493-6811

                                             September 23, 1999



PMC-Sierra, Inc.
105-8555 Baxter Place
Burnaby, British Columbia
Canada  V5A 4V7

         Re:  Registration Statement on Form S-3

Gentlemen & Ladies:

         This opinion is given in connection with the Registration  Statement on
Form S-3 under the  Securities  Act of 1933  relating to the sale by the persons
named  therein to the public of up to  3,597,123  shares of your  Common  Stock,
$0.001 par value per share ("Shares").

         We are of the  opinion  that the  issuance  of the shares has been duly
authorized by your Board of Directors,  and the shares are validly issued, fully
paid and nonassessable.

         We hereby  consent  to the  filing of the  opinion as an exhibit to the
Registration  Statement  and  further  consent  to the use of our name  wherever
appearing in the Registration Statement.


                                             Sincerely,

                                             /s/WILSON SONSINI GOODRICH & ROSATI
                                             WILSON SONSINI GOODRICH & ROSATI
                                             Professional Corporation



               CONSENT OF ERNST & YOUNG LLP, INDEPENDENT AUDITORS

We  consent to the  reference  to our firm under the  caption  "Experts"  in the
Registration Statement (Form S-3) and related Prospectus of PMC-Sierra, Inc. for
the  registration  of up to  3,597,123  shares  of its  common  stock and to the
incorporation  by reference  therein of our report dated January 22, 1997,  with
respect to the  consolidated  financial  statements  and schedule of PMC-Sierra,
Inc. (formerly Sierra Semiconductor  Corporation)  included in its Annual Report
(Form 10-K) for the year ended December 27, 1998,  filed with the Securities and
Exchange Commission

/s/Ernst & Young LLP


San Jose, California
September 21, 1999





             CONSENT OF DELOITTE & TOUCHE LLP, INDEPENDENT AUDITORS

         We consent to the reference to our firm under the caption  "Experts" in
the Registration Statement (Form S-3),and related prospectus of PMC-Sierra, Inc.
for the  registration  of up to 3,597,123  shares of its common stock and to the
incorporation  by reference  therein of our report dated January 21, 1999,  with
respect to the  consolidated  financial  statements  and schedule of PMC-Sierra,
Inc.  included in its Annual Report (Form 10-K) for the year ended  December 27,
1998, filed with the Securities and Exchange Commission.


/s/DELOITTE & TOUCHE LLP

DELOITTE & TOUCHE LLP
Vancouver, British Columbia, Canada
September 20, 1999



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