2.488/2.666gbps Oc-48/stm-16 Sonet/sdh Transceiver Corporation

The XRT91L81 is a fully integrated SONET SDH transceiver block for applications in SONET OC-48 allowing the use of Forward Error Correction (FEC) capability. The transceiver includes an on-chip Clock Multiplier Unit (CMU), which uses a high frequency Phase-Locked Loop (PLL) to generate the high- speed transmit serial Clock from slower external Clock references. It also provides Clock and Data Recovery (CDR) functions by synchronizing its on-chip Voltage Controlled Oscillator (VCO) to the incoming serial data stream. The chip provides serial-to-parallel and parallel-to-serial converters and 4-bit LVDs system Interfaces in both receive and transmit directions. The transmit section includes a 4x9 Elastic Buffer (FIFO) to absorb any phase differences between the transmitter input Clock and the internally generated transmitter reference Clock In the event of an overflow, an internal FIFO control circuit outputs an OVERFLOW indication. The FIFO under the control By Exar Corporation
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XRT91L81 Pinout will be updated soon..., now you can download the pdf datasheet to check the pinouts !
XRT91L81 circuits will be updated soon..., now you can download the pdf datasheet to check the circuits!

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