Exar Continues Rapid Expansion of SONET/SDH Product Family With Multi-Channel Framer

6/25/2002 - Exar Corporation (Nasdaq: EXAR), a leading provider of high-performance, mixed-signal silicon solutions for the worldwide communications infrastructure added another device to its SONET/SDH product portfolio. The XRT95L34 (one channel OC-12/STM-4 or four channel OC-3/STM-1 framer) is a single chip solution for framing and processing SONET data. It has integrated OC-3/OC-12 Clock and Data Recovery (CDR) and SERDES functionalities, it supports ATM mapping, and Point-to-Point Protocol (PPP) for Packet Over SONET (POS). Application targets include edge and WAN ATM switches, IP routers, and multi-protocol switches.

"This product joins our industry proven SONET/SDH data aggregation devices: the (XRT94L43) announced last October, and the XRT94L33 that was launched last month," said Dr. Roubik Gregorian, executive VP and general manager Communications Division, CTO. "Customers can develop with these new SONET/SDH devices that not only provide multiple functions, but also offer board space and power savings."

Exar's continuing focus on integration provides silicon solutions that leverages the carrier's investments in the existing networking infrastructure by enabling system OEMs to easily upgrade channel and port capacity by adding a new line card to already deployed equipment. This level of integration, when coupled with Exar's broad physical layer product families with innovative features, enables OEMs to quickly solve data transmission and aggregation design challenges.

Distinguishing Features
The XRT95L34 offers Automatic Protection Switching (APS) -- 1+1 and 1: n up to 1:14 -- in a single chip, while competitive offerings employ additional external devices to accomplish the same functionality. This offers customers protection and/or recovery of faulty data transmissions ensuring smooth data processing, and when coupled with the device's integrated CDRs for both OC-12 and OC-3, accomplishes many key functions utilizing less board space and at a lower cost. In addition, the device conforms to 8/16 bit POS-PHY/UTOPIA Level 2 interface characteristics to process both POS and ATM traffic.

"Exar's growing SONET/SDH products portfolio is aimed at giving customers the widest possible selection of physical layer products from one source (spanning T/E to SONET/SDH) for the access and metro segments of the telecommunications market," said Hugh Wright, director of marketing.

Product Details
The XRT95L34 has four OC-3/STM-1 or one OC-12/STM-4 that interfaces to CDR and SERDES industry standard optical transceivers. It supports mapping for any standard combination of STS-12c/AU-4c or STS-3c/AU4. In addition, it provides four STS-3 Telecom buses through a parallel interface or aggregates four low speed OC-3 devices on to a single OC-12 line. All three buses (POS, UTOPIA and TDM traffic) can run simultaneously enabling multi-service applications at STS-3c granularity. Other features of this product include SONET frame scrambling and descrambling, and support for 50 millisecond APS by monitoring and filtering K1 and K2 bytes. The device also supports several microprocessor interface standards including Intel, Motorola, PowerPC, and MIPs. Additionally, the XRT95L34 transceiver is compliant to industry jitter specifications: Bellcore GR-253-CORE and ITU-G 707. Prices, Packages and Availability Samples of the part will be available in August. The XRT95L34 in a 584-lead TBGA operates at 3.3V with 5V tolerant I/Os over the industrial temperature range. In 1,000 piece quantities, the XRT95L34 is $140.

About Exar
Exar Corporation (NASDAQ: EXAR) designs, develops and markets high-performance, analog and mixed-signal silicon solutions for the worldwide communications infrastructure. Leveraging its industry-proven analog design expertise, system-level knowledge and standard CMOS process technologies, Exar provides OEMs innovative, highly integrated ICs that facilitate the transport and aggregation of signals in access, metro and wide area networks. The Company's physical layer silicon solutions address transmission standards such as T/E carrier, ATM and SONET. Additionally, Exar offers ICs for both the serial communications and the video and imaging markets. The Company is based in Fremont, CA, had fiscal 2002 revenues of $55 million, and employs approximately 290 people worldwide. For more information about Exar, visit www.exar.com

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