SY87739L Datasheet | Micrel Semiconductor

Protocol Transparent, 3.3V, 10MHz to 729MHz, Fractional-N Synthesizer General Description The SY87739L is a plete rate independent frequency synthesizer integrated circuit. From a single reference source, this device generates a differential PECL output frequency from 10MHz up to 729MHz The SY87739L generates an exactly correct reference frequency for mon data transport protocols. This is especially important in transponder applications, where a standards pliant protocol data unit must be generated downstream, even in the absence of any signal from the associated upstream interface. In addition, the SY87739L will generate exactly correct reference frequencies for mon data transport protocols augmented by forward error correction codes. The SY87739L accepts configuration via a Micro Wire™ interface For proprietary applications, the SY87739L generates reference frequencies guaranteed to enable the SY87721L CDR to lock to any possible baud rate from 28Mbps to 2.7Gbps. Data sheets and support documentation can be found on Micrel’s web site at: .micrel.. Features - Protocol transparent fractional-N synthesizer from 10MHz to 729MHz from a single 27MHz reference oscillator - Generates exactly the correct frequency for mon transport protocols with or without FEC - Directly enables SY87721L CDR to lock onto any data rate within its range - Exceeds Bell Core and ITU jitter generation specifications - Programmable via Micro Wire™ interface - Available in 32-Pin e Pad-TQFP package Applications - Metro access system - Transponders - Bullet item - Multiplexers: access, Add Drop Mux - 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 and 2X Fibre Channel, 1394, Infini Band, and Proprietary Optical Transport Typical Application Circuit and Typical Performance Any Clock and Any...