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Exar LIU reduces overall design complexity

Posted: 26 Sep 2003 ?? ?Print Version ?Bookmark and Share

Keywords:line interface unit? exar? r(3) technology? xrt83sl28? liu?

Exar Corp. has expanded its R(3) Technology to E1 applications with the release of the XRT83SL28. The short-haul LIU device is targeted at Multi-Service Provisioning Platforms (MSPPs), access devices, media gateways, routers, and frame relay access devices.

The R(3) Technology (Reconfigurable, Relayless Redundancy) was first introduced in 2002 as a breakthrough capability delivering key benefits to customers designing interface cards has now been extended to the E1 environment.

The devices are Reconfigurable with integrated termination supporting both 75 and 100 omega line impedances to enable customers to build one board with a single bill-of-materials, and to give them the ability to quickly respond and reconfigure devices for compressed design cycles without the unnecessary stock piling of inventory for all configurations.

Employing relayless redundancy, the XRT83SL28 eliminates the need for external relays for 1:1 and 1+1 applications by establishing a back-up channel that can be brought on-line in the event of failure.

The device also supports automatic protection switching, local analog, remote and digital loopback modes, has on-chip HDB3 encoder/decoder for each channel, and on-chip digital clock recovery circuit with high input jitter tolerance. Other features include a parallel microprocessor bus supporting both synchronous and asynchronous microprocessor interfaces for Motorola, Intel, and MIPS processors.





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