Actel Quality Program Receives Stack Certification

Company Also Receives Recertification for ISO 9001:2000

MOUNTAIN VIEW, Calif., May 18, 2005 — Actel Corporation (Nasdaq: ACTL), a leading provider of programmable logic solutions, today announced it has received STACK certification from STACK International after an extensive audit verifying the company's commitment to delivering quality products. Actel also announced it has been recertified for ISO 9001:2000 after an audit by NSF International, a world leader in management systems registrations. These two certifications demonstrate the conformance of Actel's quality systems to internationally recognized standards and provide another benchmark of Actel's commitment to supply field-programmable gate arrays (FPGAs) of the highest quality across its diverse customer base.

"Actel's successful completion of the STACK high-level quality systems audit and compliance with the STACK specification S/0001 demonstrates that Actel is dedicated to the quality of its products," said Zia Fatherazi, managing director, STACK International. "Users are now empowered to select Actel devices with the knowledge that quality and reliability are designed into the company's products from the very beginning of the design cycle."

Dennis Kish, vice president of marketing, Actel, said, "Our comprehensive portfolio of certifications covers Actel's entire process from development and design to product and customer support. The new STACK certification and the recertification of ISO 9001:2000 are proof that Actel is committed to meeting or exceeding all product and manufacturing quality standards."

A non-profit organization established in 1974, STACK International is a group of multinational, independent, high-reliability electronics equipment manufacturers who, in a pre-competitive environment, share experience and resources. The program is designed to help reduce costs and the risk of component ownership in the telecom equipment, commercial and military avionics, consumer electronics and sub-contract manufacturing markets. STACK certification represents formal recognition by STACK that Actel meets requirements in the "STACK Purchase Specification, General Requirements for Integrated Circuits."

Actel first received ISO 9001:2000 certification in March 2004. As part of ISO certification, Actel participates in a biannual audit by NSF, an independent ISO 9001 Registrar company, which examines Actel's quality procedures and resources to verify conformance with the standard. ISO 9001:2000 is a business process tool that helps companies manage their business in a controlled, predictable manner. The result is high quality, dependable products and services.

About Actel

Actel Corporation is a supplier of innovative programmable logic solutions, including field-programmable gate arrays (FPGAs) based on antifuse and flash technologies, high-performance intellectual property (IP) cores, software development tools and design services, targeted for the high-speed communications, application-specific integrated circuit (ASIC) replacement and radiation-tolerant markets. Founded in 1985, Actel employs more than 500 people worldwide. The Company is traded on the Nasdaq National Market under the symbol ACTL and is headquartered at 2061 Stierlin Court, Mountain View, CA, 94043-4655. Telephone: 888-99-ACTEL (992-2835). Internet:: http://www.actel.com.

The Actel name and logo are trademarks of Actel Corporation. All other trademarks and service marks are the property of their respective owners.

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