EXHIBIT 23.1 CONSENT OF INDEPENDENT ACCOUNTANTS We hereby consent to the incorporation by reference in the Prospectus constituting part of the Registration Statement of Form S-3 (No. 033-62561) of Microsemi Corporation of our report dated November 16, 1998, appearing on this Form 10-K. PricewaterhouseCoopers LLP Costa Mesa, California December 24, 1998