OC-3/STS-3 Micrel, Inc. SY69952 CLOCK RECOVERING SY69952 TRANSCEIVER FEATURES DESCRIPTION A complete ATM compatible single chip Transmitter Micrel s SY69952 contains fully integrated transmitter and Receiver and receiver functions designed to provide clock recovery and generation for either 51.84Mbit/s OC/STS-1 or Seamless operation with PMC-Sierra PM5345, VLSI 155.52Mbps OC/STS-3 SONET/SDH (SY69952) and ATM T WAC-013-B/WAC-413-A and NEC VNS67200, Ig applications. PD98402 UNI Processors On-chip clock generation is performed by a low-jitter Supports clock and data recovery from 51.84Mbps phase-locked loop (PLL) allowing use of 19.44MHz or 155.52Mbps NRZ or NRZI data stream reference for 155.52MHz generation or a 6.48MHz 155.52MHz clock multiplication from 19.44MHz reference for 51.84MHz generation. Clock recovery is source or 51.84MHz clock multiplication from performed by synchronizing the on-chip VCO directly to 6.48MHz source the incoming data stream. Line Receiver Inputs: No external buffering needed The SY69952 meets the jitter compliance criteria of Bellcore, ITU/CCITT and ANSI standards. Low jitter is Differential output buffering ensured by Micrel s advanced PLL technology and Link Status Indication positive ECL (PECL) I/O. Loop-back testing Micre s circuit design techniques coupled with 100K ECL compatible I/O ASSET bipolar technology result in ultra-fast performance with low noise and low power dissipation. 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 FUNCTIONAL BLOCK DIAGRAM PLL2+ LOOP PLL2- MODE ROUT+ ROUT- RIN+ RCLK+ RIN- RCLK- RSER+ PLL RSER- CD LFI TSER+ TOUT+ TOUT- TSER- PLL TCLK+ TCLK- x8 REFCLK+ PLL1+ REFCLK- PLL1- ASSET is a trademark of Micrel, Inc. Rev.: N Amendment: /0 M9999-062805 1 Issue Date: June 2005 hbwhelp micrel.com or (408) 955-1690Micrel, Inc. SY69952 PACKAGE/ORDERING INFORMATION (1) Ordering Information ROUT+ 1 28 RCLK- ROUT- 2 27 RCLK+ Package Operating Package Lead RIN+ 3 26 RSER- RIN- 4 25 RSER+ Part Number Type Range Marking Finish MODE 5 24 LFI SY69952ZC Z28-1 Commercial SY69952ZC Sn-Pb VC 6 23 VCC CD 7 22 VEE TOP VIEW SY69952ZH Z28-1 Commercial SY69952ZH with Pb-Free LOOP 8 21 VCC SOIC Pb-Free bar-line indicator NiPdAu REFCLK- 9 20 TCLK- REFCLK+ 10 19 TCLK+ Notes: TOUT- 11 18 TSER+ 1. Contact factory for die availability. Dice are guaranteed at T = 25C, DC electricals only. TOUT+ 12 17 TSER- A PLL1+ 13 16 PLL2+ PLL1- 14 15 PLL2- 28-Pin SOIC (Z28-1) M9999-062805 2 hbwhelp micrel.com or (408) 955-1690