Exar Adds Seven-Channel T1 Physical Interface Device to its Broad T/E Product Portfolio

10/9/2002 - EXAR, a leading provider of high-performance, mixed-signal silicon solutions for the worldwide communications infrastructure added a seven-channel (T1) AFE to its extensive T/E product line. The XRT81L17 is targeted at multi-channel devices including digital cross connects, channel banks, multiplexers, high-speed data transmission line cards, as well as public switching systems and PBX interfaces.

"This new device complements an already extensive T1/E1 product family including short-haul/long-haul LIUs, framers, clock synchronization adapters and co-directional products," said Dr. Roubik Gregorian, executive vice president and general manager, Communications division, and CTO, of Exar Corporation. "The higher integration levels offered by this new device greatly reduce component requirements for T1 transmission applications."

Product Details
The XRT81L17 includes seven independent T1 analog front ends, (receiver/transmitter pairs with clock and data recovery) which enables the physical layer of a 28-line system to be implemented with only four devices. The chip contains transmit duty cycle correction circuitry so that the AFE can generate output transmit pulses independent of the transmit clock's duty cycle. The XRT81L17 is compliant with leading industry DS1 standards. It also detects and clears LOS per ITU-T G.775. In addition, the device can be controlled/configured in both hardware and host modes. This product is pin compatible with Exar's XRT81L27, a seven-channel E1 (CEPT) AFE. This pair of seven-channel LIUs offers cost effective solutions for both T1 and E1 environments.

"Making it one of the most cost effective T1 AFEs on the market (when compared to eight-channel LIUs), the XRT81L17 was architected for specific applications where the jitter attenuator is on the adjacent framer device, and where only T1 line rates need to be supported," said Hugh Wright, director of marketing. "These are critical elements for customers who want to better manage their system costs, and do not want to pay for unused capabilities."

Price & Availability
The XRT81L17IV is $29.35 in 1K quantities and comes in a 128-pin TQFP package. Sample and production parts will be available in Q4 (CY '02), and it supports the industrial temperature range.

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.

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