ALISO VIEJO, Calif., August 11, 2011 — Microsemi Corporation (Nasdaq:MSCC), a leading provider of semiconductor solutions differentiated by power, security, reliability and performance, today announced it has relocated its corporate headquarters from 2381 Morse Avenue in Irvine, Calif. to One Enterprise Drive in Aliso Viejo, Calif.

The Aliso Viejo office houses corporate, sales, marketing and engineering personnel from the company's previous headquarters location in Irvine, as well as staff from other Southern California Microsemi facilities. The new location also accommodates internal growth in addition to personnel from recent acquisitions.

"Relocating our headquarters is an exciting and important step as Microsemi continues to focus on maximizing our operational efficiency," said James J. Peterson, president and chief executive officer of Microsemi. "It also allows us to build a more synergistic environment for employees and leverage cost savings through the consolidation of company resources."

Microsemi began moving staff into the leased facility on Aug. 8 and plans to house its remaining local employees in Aliso Viejo by the end of the year. The company has approximately 2,700 employees globally.

About Microsemi

Microsemi Corporation (Nasdaq:MSCC) offers the industry's most comprehensive portfolio of semiconductor technology. Committed to solving the most critical system challenges, Microsemi's products include high-performance, high-reliability analog and RF devices, mixed signal integrated circuits, FPGAs and customizable SoCs, and complete subsystems. Microsemi serves leading system manufacturers around the world in the defense, security, aerospace, enterprise, commercial, and industrial markets. Learn more at http://www.microsemi.com.

All trademarks are property of Microsemi Corporation. Actel Corporation is a wholly owned subsidiary of Microsemi Corporation.

Contact: Ivanya Terrazas, Microsemi Corporation, 650.318.4500