PMC Sierra (PMCS) 10-K 2004 FY Annual report

Exhibit 21.1

PMC-SIERRA, INC.

LIST OF SUBSIDIARIES

1.PMC-Sierra Ltd., organized under the laws of British Columbia, doing business only under its official name or under PMC-Sierra, Inc.

2.PMC-Sierra International Inc., organized under the laws of Barbados, doing business only under its official name or under PMC-Sierra, Inc.

3.PMC-Sierra Europe Ltd., organized under the laws of the United Kingdom, doing business only under its official name or under PMC-Sierra, Inc.

4.PMC-Sierra Ireland Limited, organized under the laws of the Ireland, doing business only under its official name or under PMC-Sierra, Inc.

5.PMC-Sierra US, Inc., organized under the laws of Delaware, doing business only under its official name or under PMC-Sierra, Inc.