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Market Leader in Power Analog ICs Joins with Market Leader in Audio ICs to Offer Customers a Total Solution Package for PWM Amplifier Systems

Under the agreement, analog power ICs and advanced-circuit devices, such as HEXFET® power MOSFETs from International Rectifier, will be used to optimize power management efficiency and performance in Cirrus Logic's Pulse Width Modulation (PWM) power amplifier reference designs.

The new audio amplifiers represent a significant advancement in audio technology that reduces power requirements, improves sound quality, and reduces circuit cost and complexity. Typical applications for PWM amplifiers include any device that uses a speaker, from portable audio equipment to home and car stereos to huge radio and TV broadcasting systems.

``Working with the recognized leader in power management ICs and MOSFETs for new audio amplifier technology offers a significant advantage for our solution in the marketplace,'' said Jason Carlson, vice president and general manager of Cirrus Logic's Consumer Products Division.

``From power-conscious products that conserve every milliwatt all the way up to high-end broadcast systems that require multiple kilowatts, this agreement will allow us to provide our customers with a complete end-to-end solution as well as software and hardware support so they can get their products to market faster.''

According to David Tam, International Rectifier Power IC Group vice president: ``The digital PWM audio amplifier is a promising market area for IR's industry-leading high-voltage power ICs and MOSFETs. Our new working relationship with Cirrus Logic is in line with our corporate-wide philosophy to provide complete, value-added power solutions. The two companies will create reference designs using existing standard products as well as cutting-edge products to be developed in the future.''

About International Rectifier

International Rectifier is recognized as the leading supplier of power semiconductors and systems solutions. IR's patented HEXFET® power MOSFETs, IGBTs and high-voltage ICs make electricity work smarter in industrial automation and controls, automotive electrical systems, consumer electronics, computers and peripherals, telecommunications, lighting, and satellite/launch vehicle applications. Visit www.irf.com to learn more about International Rectifier and IR's power management solutions.

About Cirrus Logic

Cirrus Logic is a premier supplier of high-performance analog and DSP chip solutions for Internet entertainment electronics. Building on its global market share leadership in audio integrated circuits and its rich mixed-signal patent portfolio, the company targets high-volume audio, storage and communications applications. Cirrus Logic sells its products under the Crystal®, Maverick(TM) and 3Ci(TM) brands as well as its own name.

Founded in 1984 in Silicon Valley, Cirrus Logic operates from headquarters in Austin, Texas, and major sites located in Fremont, Calif., and Broomfield, Colo., as well as offices in Europe, Japan and Asia. More information about Cirrus Logic is available at www.cirrus.com.

Note to Editors: HEXFET® and IR® are registered trademarks of International Rectifier Corp. Cirrus Logic, Crystal® and Maverick(TM) are registered trademarks of Cirrus Logic Inc. All other product names noted herein may be trademarks of their respective holders.

Contact:

     International Rectifier Corp., El Segundo
     Joe Engle, 310/252-7019
      jengle1@irf.com