SY87700LHG

Application Specific Clock/Timing Overview

The SY87700LHG is a Clock and Data Recovery (CDR) integrated circuit designed for data rates from 32Mbps to 175Mbps NRZ. It operates on a single 3.3V supply within an industrial temperature range of –40°C to +85°C. The device features two on-chip PLLs: one for clock recovery and another for clock generation. It provides differential PECL high-speed serial I/O and includes selectable reference frequencies, link fault indication, and ECL 100k compatible I/O. The component is housed in a 32-pin EPAD-TQFP package.

Application Specific Clock/Timing Feature Summary

• Clock and data recovery for 32Mbps to 175Mbps NRZ data streams
• Dual on-chip PLLs for independent clock generation and recovery
• Differential PECL inputs and outputs with ECL 100k compatibility
• Link Fault detection circuit for signal integrity monitoring

Application Specific Clock/Timing Applications

• SONET/SDH OC-1 and OC-3 systems
• ATM networks
• Fast Ethernet and SMPTE 259 applications
• Proprietary architectures up to 175Mbps

Application Specific Clock/Timing Procurement Notes

Verify the specific ordering suffix 'HG' corresponds to the 32-pin EPAD-TQFP package with Pb-Free NiPdAu finish as documented in the manufacturer's ordering information. Confirm that the lead finish matches project requirements, as other suffixes indicate different packages or Sn-Pb finishes. Check current availability status directly with the manufacturer or authorized distributors.

Application Specific Clock/Timing Selection Notes

Select this component for designs requiring protocol-independent CDR at speeds up to 175Mbps. Ensure the design accommodates the 32-pin EPAD-TQFP package thermal requirements. Verify that the application supports differential PECL signaling levels. For new designs, consider if the Pb-Free version meets environmental compliance standards compared to legacy Sn-Pb options.

Application Specific Clock/Timing Part Context

The SY87700LHG belongs to the SY87700L AnyRate family of clock and data recovery ICs manufactured by Micrel (now Microchip Technology). This series is optimized for SONET/SDH and ATM applications. The 'HG' suffix specifically denotes the 32-pin TQFP variant with exposed pad and Pb-Free plating, distinct from the SOIC variants.

Application Specific Clock/Timing Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.