EXHIBIT B
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                          CERTIFICATE OF INCORPORATION

                                       OF

                                PMC-SIERRA, INC.


                                   ARTICLE I.

         The name of this corporation is PMC-Sierra, Inc. (the "Corporation").


                                   ARTICLE II.

         The  address  of the  Corporation's  registered  office in the State of
Delaware  is 1209  Orange  Street,  City of  Wilmington,  County of New  Castle,
Delaware  19801.  The  name  of its  registered  agent  at such  address  is The
Corporation Trust Company.

                                  ARTICLE III.

         The  purpose  of this  corporation  is to engage in any  lawful  act or
activity for which a corporation may be organized under the General  Corporation
Law of Delaware.

                                   ARTICLE IV.

         This  corporation  is  authorized  to issue two  classes of stock to be
designated,  respectively, "Common Stock" and "Preferred Stock." The Corporation
is authorized to issue a total of 55,000,000 shares.  50,000,000 shares shall be
Common Stock, no par value,  and 5,000,000  shares shall be Preferred  Stock, no
par value.

         The  Preferred  Stock  may be  issued  from time to time in one or more
series.  The Board of Directors is  authorized to determine or alter the rights,
preferences,  privileges and restrictions  granted to or imposed upon any wholly
unissued  series  of  Preferred  Stock;  and to fix the  number of shares of any
series of Preferred  Stock;  and to increase,  or to decrease (within the limits
and  restrictions  stated  in any  resolution  or  resolutions  of the  Board of
Directors  originally  fixing  the number of shares  constituting  any series of
Preferred  Stock,  but not below the  number of shares of any such  series  then
outstanding) the number of shares of any such series  subsequent to the issue of
shares of that  series.  In case the number of shares of any series of Preferred
Stock shall be so decreased,  the shares  constituting the decrease shall resume
the status  which they had prior to the  adoption of the  resolution  originally
fixing the number of shares of such series.

         The authority of the Board of Directors with respect to each such class
or series shall  include,  without  limitation  of the  foregoing,  the right to
determine and fix:

                          (a)       the distinctive designation of such class or
series and the number of shares to constitute such class or series;


                          (b)       the rate at which dividends on the shares of
such  class or series  shall be  declared  and paid,  or set aside for  payment,
whether dividends at the rate so determined shall be cumulative or accruing, and
whether  the  shares  of  such  class  or  series   shall  be  entitled  to  any
participating  or  other  dividends  in  addition  to  dividends  at the rate so
determined, and if so, on what terms;

                          (c)       the  right  or  obligation,  if any,  of the
Corporation  to redeem  shares of the  particular  class or series of  Preferred
Stock and, if redeemable, the price, terms and manner of such redemption;

                          (d)       the   special    and   relative  rights  and
preferences,  if any,  and the amount or amounts per share,  which the shares of
such class or series of  Preferred  Stock shall be entitled to receive  upon any
voluntary  or  involuntary  liquidation,   dissolution  or  winding  up  of  the
Corporation;

                          (e)       the terms and conditions, if any, upon which
shares of such class or series shall be convertible  into, or exchangeable  for,
shares of capital  stock of any other  class or series,  including  the price or
prices  or the  rate or  rates  of  conversion  or  exchange  and the  terms  of
adjustment, if any;

                          (f)       the obligation,  if any,  of the Corporation
to  retire,  redeem or  purchase  shares of such class or series  pursuant  to a
sinking  fund or fund of a  similar  nature  or  otherwise,  and the  terms  and
conditions of such obligation;

                          (g)       voting rights,  if any,  on  the issuance of
additional  shares of such class or series or any  shares of any other  class or
series of Preferred Stock;

                          (h)       limitations,  if any,   on  the  issuance of
additional  shares of such class or series or any  shares of any other  class or
series of Preferred Stock; and

                          (i)       such      other     preferences,     powers,
qualifications,  special or relative rights and privileges  thereof as the Board
of Directors of the  Corporation,  acting in accordance with this Certificate of
Incorporation,  may deem  advisable  and are not  inconsistent  with law and the
provisions of this Restated Certificate of Incorporation.


                                   ARTICLE V.

         The Corporation  reserves the right to amend, alter,  change, or repeal
any provision contained in this Certificate of Incorporation,  in the manner now
or  hereafter   prescribed  by  statute,  and  all  rights  conferred  upon  the
stockholders herein are granted subject to this right.


                                   ARTICLE VI.

         The Corporation is to have perpetual existence.


                                  ARTICLE VII.

         1.       Limitation of Liability.   To  the fullest extent permitted by
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the  General  Corporation  Law of the State of Delaware as the same exists or as
may hereafter be amended,  a director of the Corporation shall not be personally
liable to the Corporation or its stockholders for monetary damages for breach of
fiduciary duty as a director.

         2.       Indemnification.  The Corporation may indemnify to the fullest
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extent  permitted by law any person made or  threatened to be made a party to an
action or proceeding,  whether criminal, civil, administrative or investigative,
by reason of the fact that such person or his or her testator or intestate is or
was a director,  officer or employee of the  Corporation,  or any predecessor of
the  Corporation,  or serves or served at any other  enterprise  as a  director,
officer or employee at the request of the  Corporation or any predecessor to the
Corporation.

         3.       Amendments.   Neither any amendment nor repeal of this Article
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VII,  nor the  adoption of any  provision of the  Corporation's  Certificate  of
Incorporation  inconsistent with this Article VII, shall eliminate or reduce the
effect of this Article VII, in respect of any matter occurring, or any action or
proceeding  accruing or arising or that,  but for this Article VII, would accrue
or arise,  prior to such  amendment,  repeal,  or  adoption  of an  inconsistent
provision.


                                  ARTICLE VIII.

         In the event  any  shares  of  Preferred  Stock  shall be  redeemed  or
converted  pursuant to the terms  hereof,  the shares so  converted  or redeemed
shall not revert to the status of authorized  but unissued  shares,  but instead
shall be canceled and shall not be re-issuable by the Corporation.


                                   ARTICLE IX.

         Holders of stock of any class or series of this  Corporation  shall not
be entitled to cumulate  their votes for the  election of directors or any other
matter submitted to a vote of the stockholders.


                                   ARTICLE X.

         1.       Number of Directors. The number of directors which constitutes
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the whole Board of  Directors  of the  Corporation  shall be  designated  in the
Bylaws of the Corporation.

         2.       Election of Directors.   Elections of directors need not be by
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written ballot unless  demanded by any stockholder at the meeting and before the
voting has begun or the Bylaws of the Corporation shall so provide.


                                   ARTICLE XI.

         In  furtherance  and  not in  limitation  of the  powers  conferred  by
statute, the Board of Directors is expressly authorized to make, alter, amend or
repeal the Bylaws of the Corporation.


                                  ARTICLE XII.

         No action shall be taken by the stockholders of the Corporation  except
at an annual or special  meeting of the  stockholders  called in accordance with
the Bylaws of the Corporation,  and no action shall be taken by the stockholders
by written consent.


                                  ARTICLE XIII.

         Meetings  of  stockholders  may be held  within or without the State of
Delaware,  as the Bylaws may provide.  The books of the  Corporation may be kept
(subject to any  provision  contained in the  statutes)  outside of the State of
Delaware at such place or places as may be  designated  from time to time by the
Board of Directors or in the Bylaws of the Corporation.


                                  ARTICLE XIV.

         The name and mailing address of the incorporator are:

                                    Noga D. Spira, Esq.
                                    Wilson, Sonsini, Goodrich & Rosati
                                    650 Page Mill Road
                                    Palo Alto, California  94304-1050




                                      * * *
         The  undersigned   incorporator  hereby  acknowledges  that  the  above
Certificate of  Incorporation  of PMC-Sierra,  Inc. is her act and deed and that
the facts stated therein are true.




                                                    ----------------------------
Dated: -------, 1997                                Noga D. Spira