SY89537L 3.3V Precision LVPECL and LVDS Programmable Multiple Output Bank Clock Synthesizer and Fanout Buffer General Description The SY89537L integrated programmable clock synthesizer and fanout is part of a precision PLL- Precision Edge based clock generation family optimized for enterprise Features switch, router, and multiprocessor server applications. This family is ideal for generating internal system Integrated programmable synthesizer with multiple timing requirements up to 700MHz for multiple ASICs, output dividers, fanout buffers, and clock drivers FPGAs, and NPUs. These devices integrate the Direct interface to crystal: 14MHz to 18MHz following blocks into a single monolithic IC: Input MUX accepts a reference and a crystal PLL (Phase-Lock-Loop) based synthesizer (XTAL) source Fanout buffers Ideal for reference backup clock source or Clock generator (dividers) system test frequency source Patent-pending unique input MUX isolates XTAL Logic translation (LVPECL, LVDS) and reference inputs minimizes crosstalk Five independently programmable output Guaranteed AC performance: banks 87.15MHz to 700MHz output frequency range This level of integration minimizes additive jitter and (with RFCK at 16.6MHz) part-to-part skew associated with discrete alternatives, <100ps total jitter resulting in superior system-level timing with reduced PP board space and power. For applications that require <7ps cycle-to-cycle jitter RMS a zero-delay function, see the SY89538L. <8ps deterministic jitter PP All support documentation can be found on <0.7ps crosstalk induced jitter RMS Micrels web site at: www.micrel.com. <50ps bank-to-bank skew Output bank synchronization control pin Applications LVPECL and LVDS outputs Enterprise routers, switches, servers and TTL/CMOS compatible control logic workstations Five independently programmable output Parallel processor-based systems frequency banks: Internal system clock generation for ASICs, NPUs, Four differential LVPECL output banks FPGAs One differential LVDS output bank with 3 output pairs Markets Separate output enable for each bank LAN/WAN 3.3V 10% power supply (2.5V output capable) Enterprise servers Guaranteed over the commercial and industrial Test and measurement temperature range (-40C to +85C) Available in 44-pin (7mm x 7mm) QFN package 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. SY89537L Functional Block Diagram December 2007 2 M9999-121207-B hbwhelp micrel.com or (408) 955-1690