Exhibit 32.1

                    CERTIFICATION OF CHIEF EXECUTIVE OFFICER
                       PURSUANT TO 18 U.S.C. SECTION 1350
                       AS ADOPTED PURSUANT TO SECTION 906
                        OF THE SARBANES-OXLEY ACT OF 2002


I, Robert L. Bailey  hereby  certify,  in  accordance  with 18 U.S.C.  1350,  as
adopted  pursuant  to  Section  906 of the  Sarbanes-Oxley  Act of  2002,  in my
capacity as an officer of PMC-Sierra,  Inc. ("PMC"), that, to my knowledge,  the
Quarterly  Report of PMC on Form 10-Q for the period ended  September  28, 2003,
fully  complies  with  the  requirements  of  Section  13  (a) or  15(d)  of the
Securities  Exchange  Act of 1934  and that the  information  contained  in such
report fairly presents,  in all material respects,  the financial  condition and
results of operations of PMC.


Date:   November 7, 2003               By: /s/ Robert L. Bailey
       ------------------                  -------------------------------------
                                           Robert L. Bailey
                                           President and Chief Executive Officer