<PAGE>
Exhibit 23.1
CONSENT OF DELOITTE & TOUCHE LLP, INDEPENDENT AUDITORS
We consent to the use in this Amendment No. 1 to Registration Statement No.
333-41878 of PMC-Sierra, Inc. on Form S-4 of our report dated January 17, 2000
(July 11, 2000, as to Notes 2 and 14 on the financial statements of PMC-Sierra,
Inc. for the years ended December 31, 1999, 1998 and 1997, appearing in the
proxy statement-prospectus, which is part of this Registration Statement, and
to the reference to us under the heading "Experts" in such Prospectus.
/s/ DELOITTE & TOUCHE LLP
Vancouver, British Columbia, Canada
July 26, 2000