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Chandler and Phoenix, Arizona, October 30, 2008 – Microchip Technology Incorporated (NASDAQ: MCHP) and ON Semiconductor Corporation (NASDAQ: ONNN) today announced that they are disappointed with Atmel Corporation’s (NASDAQ: ATML) rejection of Microchip’s and ON Semiconductor’s proposal to acquire Atmel for a significant premium at $5.00 per share in cash without engaging in any discussions with Microchip and ON Semiconductor. Microchip and ON Semiconductor will consult with their respective Boards of Directors and advisors and will determine their next steps in due course.

About Microchip Technology
Microchip Technology Incorporated (NASDAQ: MCHP) is a leading provider of microcontroller and analog semiconductors, providing low-risk product development, lower total system cost and faster time to market for thousands of diverse customer applications worldwide. Headquartered in Chandler, Ariz., Microchip offers outstanding technical support along with dependable delivery and quality. For more information, visit Microchip’s website at www.microchip.com.

About ON Semiconductor
With its global logistics network and strong product portfolio, ON Semiconductor Corporation (NASDAQ: ONNN) is a preferred supplier of high performance, energy efficient, silicon solutions to customers in the power supply, automotive, communication, computer, consumer, medical, industrial, mobile phone, and military/aerospace markets. The company’s broad portfolio includes power, analog, DSP, mixed-signal, advance logic, clock management, non-volatile memory and standard component devices. Global corporate headquarters are located in Phoenix, Arizona. The company operates a network of manufacturing facilities, sales offices and design centers in key markets throughout North America, Europe, and the Asia Pacific regions. For more information, visit https://www.onsemi.com.

Microchip Investor Relations Contacts:
MacKenzie Partners
Amy Bilbija
(650) 798-5206
abilbija@mackenziepartners.com

ON Semiconductor Investor Contacts:
Ken Rizvi
(602) 244-3437
ken.rizvi@onsemi.com

Microchip Media Contacts:
Sard Verbinnen & Co
David Reno
(212) 687-8080
dreno@sardverb.com
Andrew Cole or Ron Low
(415) 618-8750
acole@sardverb.com / rlow@sardverb.com

ON Semiconductor Media Contact:
Anne Spitza
(602) 244-6398
anne.spitza@onsemi.com

About onsemi

onsemi (Nasdaq: ON) is driving disruptive innovations to help build a better future. With a focus on automotive and industrial end-markets, the company is accelerating change in megatrends such as vehicle electrification and safety, sustainable energy grids, industrial automation, and 5G and cloud infrastructure. With a highly differentiated and innovative product portfolio, onsemi creates intelligent power and sensing technologies that solve the world’s most complex challenges and leads the way in creating a safer, cleaner, and smarter world.

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onsemi and the onsemi logo are trademarks of Semiconductor Components Industries, LLC. All other brand and product names appearing in this document are registered trademarks or trademarks of their respective holders. Although the Company references its website in this news release, information on the website is not to be incorporated herein.

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