SY69952

Micrel, Inc. OC-3/STS-3 CLOCK RECOVERING TRANSCEIVER SY69952 SY69952 FEATURES DESCRIPTION „ A complete ATM compatible single chip Transmitter and Receiver „ Seamless operation with PMC-Sierra PM5345, VLSI VNS67200, IgT WAC-013-B/WAC-413-A and NEC µPD98402 UNI Processors „ Supports clock and data recovery from 51.84Mbps or 155.52Mbps NRZ or NRZI data stream „ 155.52MHz clock multiplication from 19.44MHz source or 51.84MHz clock multiplication from 6.48MHz source „ Line Receiver Inputs: No external buffering needed „ Differential output buffering „ Link Status Indication „ Loop-back testing „ 100K ECL compatible I/O „ Single +5 volt power supply „ Replacement for Cypress CY7B952 „ The SY69952 complies with Bellcore, ITU/CCITT and ANSI specifications „ Available in 28-pin SOIC package Micrel's SY69952 contains fully integrated transmitter and receiver functions designed to provide clock recovery and generation for either 51.84Mbit/s OC/STS-1 or 155.52Mbps OC/STS-3 SONET/SDH (SY69952) and ATM applications. On-chip clock generation is performed by a low-jitter phase-locked loop (PLL) allowing use of 19.44MHz reference for 155.52MHz generation or a 6.48MHz reference for 51.84MHz generation. Clock recovery is performed by synchronizing the on-chip VCO directly to the incoming data stream. The SY69952 meets the jitter compliance criteria of Bellcore, ITU/CCITT and ANSI standards. Low jitter is ensured by Micrel's advanced PLL technology and positive ECL (PECL) I/O. Micre's circ...