ON SEMICONDUCTOR acquires PULSECORE SEMICONDUCTOR

PHOENIX, Ariz. – Nov. 4, 2009 - ON Semiconductor (Nasdaq: ONNN) today announced the acquisition of PulseCore Semiconductor in an all cash transaction for initial consideration of approximately $17 million. PulseCore is now a wholly owned subsidiary of ON Semiconductor.

“The acquisition of PulseCore expands ON Semiconductor’s high gross margin clock and circuit protection offerings for the consumer, wireless and computing end-market customers,” said Keith Jackson, ON Semiconductor president and CEO. “PulseCore’s capabilities in standard and custom highspeed and low power analog and mixed signal solutions for electromagnetic interference (EMI) reduction also enhance ON Semiconductor’s overall EMI filtering and circuit protection portfolios. In addition, PulseCore’s strong design capabilities and history in India represents ON Semiconductor’s first foray into design activity in that country.”

This acquisition provides current and prospective customers of PulseCore products access to ON Semiconductor’s world-class global manufacturing, sales, and support operations.

PulseCore’s multiple generations of EMI reduction technology — including its standard and custom highspeed and low-power analog and mixed-signal silicon solutions — address the growing problem of EMI compliance issues within high-volume consumer applications. PulseCore’s proprietary spread-spectrum technology has been proven in a range of applications from top-tier consumer electronics OEM’s.

The majority of customers’ daily business interactions with PulseCore Semiconductor, including sales operations, will remain unchanged at this time. In addition, substantially all PulseCore employees will join the ON Semiconductor team. PulseCore customers can expect to be contacted by their ON Semiconductor Account Management team. Prior to hearing from their account manager, customers can contact their existing customer service representative with any questions. For more information about ON Semiconductor, visit www.onsemi.com.