SY87701LZG

Application Specific Clock/Timing Overview

The SY87701LZG is a Clock and Data Recovery (CDR) integrated circuit manufactured by Microchip Technology, originally designed by Micrel. It operates on a single 3.3V power supply within an industrial temperature range of –40°C to +85°C. The device supports data rates from 32Mbps up to 1.25Gbps for NRZ streams. It features two on-chip PLLs: one for clock recovery and another for clock generation. The component is housed in a 28-pin SOIC package with Pb-Free NiPdAu bar line indicator finish.

Application Specific Clock/Timing Feature Summary

• Clock and data recovery from 32Mbps up to 1.25Gbps NRZ data stream
• Two on-chip PLLs: one for clock generation and another for clock recovery
• Differential PECL high-speed serial I/O with 100k ECL compatible I/O
• Link fault indication and selectable reference frequencies

Application Specific Clock/Timing Applications

• SONET/SDH/ATM OC-1, OC-3, OC-12, OC-24
• Fibre Channel, Escon, SMPTE 259
• Gigabit Ethernet/Fast Ethernet
• Proprietary architecture up to 1.25Gbps

Application Specific Clock/Timing Procurement Notes

Verify the specific ordering suffix 'ZG' corresponds to the Pb-Free package with NiPdAu finish as documented in the manufacturer's ordering information. Confirm that the 28-pin SOIC package meets design requirements, noting that it is not recommended for new designs. Ensure compliance with the specified operating voltage range of +3.15V to +3.45V and the industrial temperature limits.

Application Specific Clock/Timing Selection Notes

Select the SY87701LZG for applications requiring protocol-independent clock and data recovery at any rate between 32Mbps and 1.25Gbps. Consider the 32-pin EPAD-TQFP package if thermal performance or new design recommendations are prioritized over the SOIC form factor. Verify frequency selection configurations via FREQSEL pins to match the required data rate ranges.

Application Specific Clock/Timing Part Context

The SY87701LZG belongs to the SY87701L family of CDR devices. It is functionally similar to the SY87701AL but operates at 3.3V compared to the AL variant's specifications. The device integrates a link fault detection circuit and allows for selectable reference frequencies. It complies with Bellcore, ITU/CCITT, and ANSI specifications for high-speed data transmission systems.

Application Specific Clock/Timing Replacement Considerations

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