Microchip | SY87729LHY

The SY87729LHY is a complete rate independent frequency synthesizer integrated circuit with a single reference source, generates a differential PECL reference frequency for SY87721L 10 Mbps to 2.7 Gbps combined CDR and CMU.

It generates an exactly correct reference frequency for common data transport protocols, this is especially important in transponder applications and where a standards compliant protocol data unit must be generated downstream, even in the absence of any signal from the associated upstream interface.

Features:

• Fractional synthesizer from 10 MHz to 365 MHz
• Generates exactly the frequency for common transport protocols
• Directly enables SY87721L to lock onto any data rate
• Exceeds BellCore and ITU jitter generation specifications
• Programmable via MicroWire™ interface
• Available in 32-Pin EPAD-TQFP package

Applications:

• Metro access system
• Transponders
• Multiplexers: access, add drop mux
• SONET/SDH/ATM-based transmission systems
• Broadband cross-connects
• Fiber optic test equipment