SY87701VZH

Application Specific Clock/Timing Overview

The SY87701VZH is a Clock and Data Recovery (CDR) integrated circuit manufactured by Microchip Technology, housed in a 28-pin SOIC package. It supports data rates from 32Mbps to 1.25Gbps for NRZ streams and operates with 3.3V or 5V power supplies. The device features two on-chip PLLs for clock generation and recovery, differential PECL high-speed serial I/O, and link fault indication. It complies with Bellcore, ITU/CCITT, and ANSI specifications for SONET/SDH, ATM, Fibre Channel, and Gigabit Ethernet applications.

Application Specific Clock/Timing Feature Summary

• Clock and data recovery for 32Mbps to 1.25Gbps NRZ data streams
• Dual on-chip PLLs: one for clock generation and another for clock recovery
• Differential PECL high-speed serial I/O with selectable reference frequencies
• Link fault detection circuit and 100K ECL compatible I/O

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 component status as the SY87701VZH is listed as obsolete in distributor databases. Confirm availability of replacement packages such as the SY87701VHH or SY87701VZC if sourcing new units. Ensure compliance with RoHS requirements and check for Pb-Free bar line indicators on the marking.

Application Specific Clock/Timing Selection Notes

Select the SY87701VZH for designs requiring a 28-pin SOIC package. Note that the datasheet recommends the 32-pin EPAD-TQFP package for new designs due to thermal considerations. Ensure VCC, VCCA, and VCCO supply voltages are identical and within the 3.3V or 5V range. Maintain case temperature at or below 70°C for optimal reliability.

Application Specific Clock/Timing Part Context

The SY87701VZH belongs to the SY87701V series, originally developed by Micrel, Inc. before its acquisition by Microchip Technology. This series provides complete clock recovery and data retiming solutions for high-speed data transmission systems. The Z suffix indicates the 28-pin SOIC package variant.

Application Specific Clock/Timing Replacement Considerations

Public confirmed substitute part numbers include SY87701VZC (SOIC, Sn-Pb), SY87701VHC (TQFP, Sn-Pb), and SY87701VHH (TQFP, Pb-Free). Verify package compatibility and lead finish requirements when substituting.