SY87729LHY Microchip

SY87729L 3.3V AnyClock , 10MHz to 365MHz Fractional N Synthesizer General Description The SY87729L is a complete rate independent frequency AnyClock synthesizer integrated circuit. From a single reference source, this device generates a differential PECL Features reference frequency for Micrel s SY87721L 10Mbps to Fractional synthesizer from 10MHz to 365MHz from a 2.7Gbps combined CDR and CMU. single 27MHz reference oscillator The SY87729L generates an exactly correct reference Generates exactly the correct frequency for common frequency for common data transport protocols. This is transport protocols with or without FEC especially important in transponder applications, where a Directly enables SY87721L to lock onto any data rate standards compliant protocol data unit must be generated within its range downstream, even in the absence of any signal from the associated upstream interface. Exceeds BellCore and ITU jitter generation specifications In addition, SY87729L will generate exactly correct reference frequencies for common data transport protocols Programmable via MicroWire interface augmented by forward error correction codes. Available in 32-Pin EPAD-TQFP package For proprietary applications, the SY87729L generates reference frequencies guaranteed to enable the SY87721L Applications CDR to lock to any possible baud rate in its range. SY87729L accepts configuration via a MicroWire Metro access system interface. Transponders Data sheets and support documentation can be found on Multiplexers: access, add drop mux Micrels web site at: www.micrel.com. SONET/SDH/ATM-based transmission systems, modules and test equipment Broadband cross-connects Fiber optic test equipment Protocols supported: OC-1, OC-3, OC-12, OC-48, ATM, Gigabit Ethernet, Fast Ethernet, Fibre Channel, 2X Fibre Channel, 1394, InfiniBand, Proprietary Optical Transport AnyClock and AnyRate are registered trademarks of Micrel, Inc. MicroWire is a trademark of National Semiconductor Micrel Inc. 2180 Fortune Drive San Jose, CA 95131 USA tel +1 (408) 944-0800 fax + 1 (408) 474-1000 Micrel, Inc. SY87729L (1) Ordering Information Part Number Package Type Operating Range Package Marking SY87729LHY with (3, 3) SY87729LHY H32-2 Industrial Pb-Free Bar-Line Indicator (2, 3) SY87729LHY with SY87729LHYTR H32-2 Industrial Pb-Free Bar-Line Indicator Notes: 1. Contact factory for die availability. Dice are guaranteed at T = 25 C, DC electricals only. A 2. Tape and Reel. 3. Pb-free package is recommended for new designs. System Block Diagram M9999-072111-G July 2011 2 hbwhelp micrel.com or (408) 955-1690