SY87739LHY-TR

Application Specific Clock/Timing Overview

The SY87739LHY-TR is a protocol-transparent, fractional-N frequency synthesizer manufactured by Microchip Technology. It generates differential PECL output frequencies ranging from 10MHz to 729MHz using a single 27MHz reference oscillator. The device supports common data transport protocols and enables the SY87721L CDR to lock to any baud rate between 28Mbps and 2.7Gbps. Configuration is managed via a MicroWire interface. It operates on a +3.3V supply within an industrial temperature range of -40°C to +85°C and is housed in a 32-pin ePad-TQFP package.

Application Specific Clock/Timing Feature Summary

• Protocol-transparent fractional-N synthesizer generating 10MHz to 729MHz from a 27MHz reference
• Generates exact frequencies for standard protocols (OC-1/3/12/48, ATM, Gigabit Ethernet) and AnyRate configurations
• Exceeds BellCore and ITU jitter generation specifications
• Configurable via 3-wire MicroWire serial interface

Application Specific Clock/Timing Applications

• Metro access systems
• Transponders
• SONET/SDH/ATM transmission systems and modules
• Fiber optic test equipment
• Broadband cross-connects

Application Specific Clock/Timing Procurement Notes

Verify the 'HY' suffix indicates a Pb-Free package with Matte-Sn finish and a Pb-Free Bar Line Indicator. Confirm the 'TR' suffix specifies Tape and Reel packaging. Check current availability status as distribution may vary.

Application Specific Clock/Timing Selection Notes

Select this component when a single reference source must generate precise frequencies for multiple varying data rates or specific protocols like OC-48 and InfiniBand. Ensure the design accommodates the required external loop filter components for both the Fractional-N and Wrapper PLL stages.

Application Specific Clock/Timing Part Context

This part belongs to the SY87739L series of AnyClock synthesizers. The 'HY' variant denotes the Pb-free version, while 'HI' represents the Sn-Pb leaded version. Both are available in the H32-2 (ePad-TQFP) package type.

Application Specific Clock/Timing Replacement Considerations

Public confirmed substitute part numbers are not provided in the source material.