SY58621L Precision 3.2Gbps CML/LVPECL Backplane Transceiver with Integrated Loopback General Description The SY58621L is a low jitter, high-speed transceiver Precision Edge with a variable swing LVPECL transmitter buffer and a Features CML high-gain receiver optimized for precision telecom and enterprise server transmission line and backplane Guaranteed AC performance over temperature and data management. The SY58621L distributes data to voltage: 3.2Gbps guaranteed over temperature and voltage. - Maximum Throughput 3.2Gbps The SY58621L transmitter differential input includes - <160ps t /t time r f Micrels unique, patented 3-pin input termination Transmitter architecture that directly interfaces to any (AC- or DC- - Patented input termination directly interfaces to AC- coupled) differential signal as small as 100mV or DC-coupled differential inputs (200mV ) without any termination resistor network in PP - Variable swing LVPECL output the signal path. The receiver differential input is Receiver optimized to interface directly to AC-coupled signals as - 32dB high-gain Input small as 10mV (20mV ). The receiver output is 50 PP - Internal 50 input termination source-terminated CML and the transmitter output is - Accepts AC-coupled input signals as small as 10mV variable swing 80mV to 800mV LVPECL with extremely (20mv ) fast rise/fall time. PP - 400mV (800mV ) differential CML output swing PP To support remote self-testing, the SY58621L features a Loss-of-Signal (LOS) high-speed loopback test mode. The input control signal - High-gain, TTL-compatible LOS output with internal LOOPBACK enables an internal loopback path from the 4.75k pull-up transmitter input to the receiver output. - Programmable LOS level set The SY58621L operates from a 3.3V 10% supply and Ultra-low jitter design is guaranteed over the full industrial temperature range - <5ps random jitter of 40C to +85C. The SY58621L is part of Micrels RMS Patent-pending MUX isolates the receiver and the high-speed, Precision Edge product line. For applications that requires a CML receiver and transmitter channels minimizing on crosstalk transmitter, consider the SY58620L. Selectable loopback diagnostic mode Output enables on transmitter and receiver outputs All support documentation can be found on Micrels web site at: www.micrel.com. Power supply +3.3V 10% Industrial temperature range -40C to +85C Applications Available in 24-pin (4mm x 4mm) QFN Backplane management Markets Active cable transceivers Precision telecom SONET/SDH data/clock applications Enterprise server 4X Fibre Channel applications ATE Test and measurement United States Patent No. RE44,134 Precision Edge is a registered trademark of Micrel, Inc. Micrel Inc. 2180 Fortune Drive San Jose, CA 95131 USA tel +1 (408) 944-0800 fax + 1 (408) 474-1000 Micrel, Inc. SY58621L Typical Applications Functional Block Diagram Note: It is recommended that R 10k. See the Typical Operating Characteristics section for more details. LOSLVL 2 M9999-012006-B January 2006 hbwhelp micrel.com or (408) 955-1690