ANALOG DEVICES INITIATES PATENT AND COPYRIGHT INFRINGEMENT LAWSUIT AGAINST SILICON LABS

Lawsuit asserts Silicon Labs isolators infringe U.S. patents and copyrights related to ADI's iCoupler® isolation products.

Norwood, MA (12/20/2006) - Analog Devices, Inc. (NYSE: ADI), a global leader in high-performance semiconductors for signal processing applications, announced that it has filed a lawsuit in the United States District Court for the District of Massachusetts, in Boston, against Silicon Laboratories Inc (Nasdaq: SLAB). The complaint alleges that Silicon Labs' Si84xx family of products infringe multiple U.S. patents addressing physical construction and signaling techniques related to ADI’s iCoupler® digital isolation products, and that SiLabs datasheets infringe the copyright on ADI datasheets for the iCoupler products. The complaint seeks unspecified damages and a court-ordered injunction against future infringement by Silicon Labs. In addition to its U.S. patents, Analog Devices has corresponding patent applications related to its digital isolation products pending in several countries.

Analog Devices’ iCoupler digital isolators enable communication between separate electrical circuits while preventing current flow between them. Such products are used in applications where excessive current flow could harm equipment or users or adversely affect product performance. ADI has sold more than 30 million iCoupler products to thousands of customers around the world. iCoupler digital isolation products have been designed into equipment spanning a wide variety of markets, including industrial instrumentation, power supplies, medical equipment, communication networks and flat-panel televisions.

“ADI had the vision, the engineering expertise, and the financial resources to develop a new class of isolation components and we have been awarded more than 10 patents that recognize the company’s innovation in this area," said Margaret K. Seif, ADI's vice president and general counsel. “We started investing in this technology in 1997 and began selling products based upon it in 2001. We are taking this action today to protect our intellectual property and our investment.”

About Analog Devices
Innovation, performance, and excellence are the cultural pillars on which Analog Devices has built one of the longest standing, highest growth companies within the technology sector. Acknowledged industry-wide as the world leader in data conversion and signal conditioning technology, Analog Devices serves over 60,000 customers, representing virtually all types of electronic equipment. Celebrating 40 years as a leading global manufacturer of high-performance integrated circuits used in analog and digital signal processing applications, Analog Devices is headquartered in Norwood, Massachusetts, with design and manufacturing facilities throughout the world. Analog Devices' common stock is listed on the New York Stock Exchange under the ticker “ADI” and is included in the S&P 500 Index.

iCoupler is a registered trademark of Analog Devices, Inc.

Editor's Contact Information:

Maria Tagliaferro
781-461-3601
781-461-3491
investor.relations@analog.com

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