SY89218U Precision 1:15 LVDS Fanout Buffer with 2:1 MUX and Four 1/2/4 Clock Divider Output Banks General Description Features The SY89218U is a 2.5V precision, high-speed, Low-skew LVDS output banks with independently integrated clock divider and LVDS fanout buffer capable programmable 1, 2 and 4 divider options of handling clocks up to 1.5GHz. Optimized for Four output banks, 15 total outputs communications applications, the four independently Guaranteed AC performance over temperature and controlled output banks are phase-matched and can be voltage: configured for pass through (1), 2 or 4 divider ratios. Accepts a clock frequency up to 1.5GHz The differential input includes Micrels unique, 3-pin <1600ps IN-to-OUT propagation delay input termination architecture that allows the user to <200ps rise/fall time interface to any differential signal (AC- or DC-coupled) as small as 100mV (200mV ) without any level shifting <35ps within bank skew PP or termination resistor networks in the signal path. The Fail Safe Input low-skew, low-jitter outputs are LVDS compatible with Prevents outputs from oscillating extremely fast rise/fall times guaranteed to be less than Ultra-low jitter design: 200ps. <1ps random jitter RMS The /MR (master reset) input asynchronously resets the <10ps total jitter (clock) PP outputs. A four-clock delay after de-asserting /MR allows Patent-pending input termination and VT pin accepts the counters to synchronize and start the outputs from DC- and AC-coupled inputs (CML, PECL, LVDS) the same state without any runt pulse. LVDS-compatible outputs The SY89218U is part of Micrels Precision Edge product family. All support documentation can be found CMOS/TTL-compatible output enable (EN) and at Micrel s web site at: www.micrel.com. divider select control 2.5V 5% power supply 40C to +85C temperature range Available in 64-pin TQFP Applications All SONET/SDH applications All Fibre Channel applications All Gigabit Ethernet applications Markets LAN/WAN routers/switches Storage 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. SY89218U Functional Block Diagram 2 M9999-082407-C August 2007 hbwhelp micrel.com or (408) 955-1690