SY87700VZC

Application Specific Clock/Timing Overview

The SY87700VZC is a Clock and Data Recovery (CDR) integrated circuit manufactured by Micrel, Inc. It supports data rates from 32Mbps to 175Mbps NRZ and operates with 3.3V or 5V power supplies. The device features two on-chip PLLs for clock generation and recovery, selectable reference frequencies, and differential PECL high-speed serial I/O. It complies with SONET/SDH/ATM standards including OC-1 and OC-3. The component is housed in a 28-pin SOIC package.

Application Specific Clock/Timing Feature Summary

• Clock and data recovery for 32Mbps to 175Mbps NRZ data streams
• Dual on-chip PLLs: one for clock generation and another for clock recovery
• Selectable reference frequencies via FREQSEL pins
• Differential PECL high-speed serial I/O outputs

Application Specific Clock/Timing Applications

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

Application Specific Clock/Timing Procurement Notes

Verify the manufacturer origin as this part was originally produced by Micrel, Inc., which has since been acquired by Microchip Technology. Confirm that the 28-pin SOIC package meets current design requirements, as datasheets indicate it is not recommended for new designs. Ensure compatibility with commercial temperature ranges of 0°C to +85°C.

Application Specific Clock/Timing Selection Notes

Select the SY87700VZC when operating within the 32Mbps to 175Mbps range using 3.3V or 5V supplies. Consider the SY87700ALHG for lower power consumption in 3.3V-only systems. Evaluate the 32-pin EPAD-TQFP package if thermal management is critical, as the SOIC package has limited thermal dissipation capabilities.

Application Specific Clock/Timing Part Context

This component belongs to the SY87700 family of clock and data recovery ICs designed for high-speed serial communication. It is functionally similar to the SY87701V but operates at lower maximum frequencies. The Z suffix denotes the 28-pin SOIC package variant.

Application Specific Clock/Timing Replacement Considerations

Public confirmed substitute part numbers include SY87700VZH (Pb-Free version of the same package) and SY87700ALHG (lower power alternative). Verify pinout and electrical characteristics before substitution.