SY89871U 2.5GHz Any Diff. In-To-LVPECL Programmable Clock Divider/Fanout Buffer w/ Internal Termination Precision Edge General Description Features The SY89871U is a 2.5V/3.3V LVPECL output precision Two matched-delay outputs: clock divider capable of accepting a high-speed differential clock input (AC or DC-coupled) CML, LVPECL, HSTL or - Bank A: undivided pass-through (QA) - Bank B: programmable divide by 2, 4, 8, 16 (QB0, LVDS clock input signal and dividing down the frequency using a programmable divider ratio to create a frequency- QB1) locked lower speed version of the input clock (Bank B). Matched delay: all outputs have matched delay, Available divider ratios are 2, 4, 8, and 16. In a typical independent of divider setting 622MHz clock system this would provide availability of Guaranteed AC performance: 311MHz, 115MHz, 77MHz, or 38MHz auxiliary clock - >2.5GHz f MAX components. - <250ps t /t r f The differential input buffer has a unique internal - <670ps t (matched delay) pd termination design that allows access to the termination - <15ps within-device skew network through a VT pin. This feature allows the device to Low jitter design easily interface to different logic standards. A V REF-AC - 231fs RMS phase jitter (Typ) reference is included for AC-coupled applications. Power supply 3.3V or 2.5V The SY89871U includes two phase-matched output banks. Unique patent-pending input termination and VT pin for Bank A (QA) is a frequency-matched copy of the input. DC- and AC- coupled inputs: any differential inputs Bank B (QB0, QB1) is a divided down output of the input (LVPECL, LVDS, CML, HSTL) frequency. Bank A and Bank B maintain a matched delay TTL/CMOS inputs for select and reset independent of the divider setting. 100K EP compatible LVPECL outputs Data sheets and support documentation can be found on Micrels web site at: www.micrel.com. Parallel programming capability Wide operating temperature range: -40C to +85C Available in 16-pin (3mm x 3mm) QFN package Typical Performance Applications OC-3 to OC-192 SONET/SDH applications Transponders Oscillators SONET/SDH line cards 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 Functional Block Diagram Ordering Information Part Number Package Type Operating Range Package Marking Lead Finish (2) SY89871UMG QFN-16 Industrial 871U with Pb-Free bar line indicator NiPdAu Pb-Free (1,2) SY89871UMGTR QFN-16 Industrial 871U with Pb-Free bar line indicator NiPdAu Pb-Free Note: 1. Contact factory for die availability. Dice are guaranteed at TA = 25C, DC Electricals only. 2. Tape and Reel. Oct. 1, 2013 2 M9999-010512-F hbwhelp micrel.com or (408) 955-1690