Multi-rate CDR chip targets optical, backplane applications - Embedded.com

Multi-rate CDR chip targets optical, backplane applications

Fremont, Calif.—Exar Corp. launched a SONET/SDH OC-3/-12 Clock and Data Recovery (CDR) device for industry-standard optical and backplane applications.

According to Exar, the XRT91L33 is intended for the cost-reduction trend and increased design margin needs on new and legacy line card designs in add-drop multiplexers, cross-connect equipment, and multi-service switches and routers.

The XRT91L33 adds Exar's existing family of SONET/SDH transceiver products: the XRT91L31, XRT91L32, XRT91L80 and XRT91L82 operating at OC-3, OC-12 and OC-48 rates as well the Quad CDR device (XRT91L34) introduced in 2007 for OC-3 and OC-12 applications.

Utilizing the underlying technology footprint from Exar's XRT91L34 quad CDR device, the XRT91L33 is a single channel solution operating at 155/622 Mbps SONET/SDH data rates. This device features low power dissipation in a small footprint 20-pin TSSOP package.

The XRT91L33 can generate all clocks from a low cost 19MHz crystal oscillator. In addition, this device is able to detect and generate various alarms and status outputs to provide immediate system alerts and complete fault coverage. The device incorporates on chip power regulation to provide high noise and crosstalk immunity in SONET/SDH applications.

Pricing: At 1,000 piece quantities, in a 20-pin TSSOP package, the XRT91L33 is priced at around $7.50 each.
Availability: Now.
Datasheet: Click here.

Exar, www.exar.com

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