SiRFstarIII Featured in TomTom's Innovative Portable Navigation Product

SAN JOSE, Calif., Dec. 21 - Continuing to drive GPS further into the mainstream market, SiRF Technology Holdings, Inc. (NASDAQ:SIRF) , a leading provider of GPS-enabled location technology, today revealed that its flagship SiRFstarIII(TM) GPS technology is at the heart of TomTom's RIDER, a high performance portable navigation system specifically designed for use on motorcycles and scooters. TomTom is a leading provider of personal navigation products and services to the US and European consumer markets.

"SiRF continues to build on its relationship with TomTom to drive portable navigation systems further into mainstream markets," said Kanwar Chadha, founder and vice president of marketing for SiRF. "With its high sensitivity and market leading navigation performance, we believe the SiRFstarIII architecture is setting a new performance standard to meet consumer expectations for navigation systems."

The TomTom RIDER includes an integrated GPS receiver based on SiRFstarIII technology with 20-channel all-in-view tracking and an integrated GPS antenna. The tough, weather-resistant case fixes easily to any motorbike, motorcycle or scooter, and can be transferred from one bike to another and even to a car. Its simple, easy-to-use touch screen has been designed to work even with gloves, and features an anti-glare face and integrated sun visor that ensures the best view of the screen possible.

"TomTom continually strives to deliver products that offer consumers cutting edge technology that is easy to use," said Jocelyn Vigreux, president of TomTom. "SiRFstarIII's high signal sensitivity and robust navigation performance allow us to offer our consumers even more improved quality and performance."

With its 200,000 correlators combined with sophisticated navigation algorithms, the SiRFstarIII architecture sets a new benchmark for fast and deep GPS signal search, track and navigate capabilities, making it possible to achieve very fast and robust positioning even through dense foliage and urban canyons.

About TomTom

TomTom NV is a leading provider of personal navigation products and services to the consumer market. TomTom's products are developed with an emphasis on innovation, quality, ease of use and value. TomTom's products include all-in-one navigation devices, which enable customers to navigate right out of the box, as well as navigation software products which integrate with third party devices such as PDAs and smartphones. TomTom's portfolio of products and services includes the award-winning TomTom GO family of integrated navigation devices, the TomTom ONE, the TomTom Navigator software for PDAs, TomTom MOBILE navigation software for smart phones and TomTom Plus, a location-based content and services offering for TomTom's navigation products and Datafactory's Webfleet platform for Tracking and Tracing services. TomTom was founded in 1991 in Amsterdam and has offices in the Netherlands, the United Kingdom, Germany, the United States and Taiwan. TomTom's products are sold through a network of leading retailers in 20 countries and online.

About SiRF Technology

SiRF Technology Holdings, Inc. develops and markets semiconductor and software products that are designed to enable location-awareness utilizing GPS and other location technologies in high-volume mobile consumer devices and commercial applications. SiRF's technology has been integrated into mobile consumer devices, such as automobile navigation systems, mobile phones, PDAs, GPS-based peripherals and handheld GPS navigation devices, and into commercial applications, such as asset tracking devices and fleet management systems. SiRF markets and sells its products in four target platforms: automotive, consumer electronics, mobile computing, and wireless devices. Founded in 1995, SiRF is headquartered in San Jose, Calif., and has sales offices, design centers and research facilities around the world. The company trades on the NASDAQ Stock Exchange under the symbol SIRF. Additional information about SiRF and its Location Technology solutions can be found at www.sirf.com.

Forward-Looking Statements

Except for the historical information contained herein, the matters set forth in this press release, including, but not limited to, statements regarding the features and benefits of the SiRFstarIII architecture, anticipated features and benefits of the TomTom RIDER, and the increased GPS presence in the consumer mainstream are forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. Words such as "to," "being," "possible," "may," "addresses," "designed to," "provide," "believe," and similar expressions are intended to identify forward-looking statements. These statements are not guarantees of future performance and should not be considered as an indication of future performance. SiRF's actual results could differ materially from those discussed in these forward-looking statements as a result of risks and uncertainties, including, among others, demand and market acceptance for our products and those of our customers, the market for GPS-based location awareness capabilities, risks associated with the semiconductor industry and other risks and uncertainties discussed in the Company's Quarterly Report on Form 10-Q for the quarter ended June 30, 2005 and from time to time in SiRF's SEC reports. These forward-looking statements speak only as of the date hereof. We do not undertake any obligation to update forward-looking statements.