SY87700ALHG-TR

Application Specific Clock/Timing Overview

The SY87700ALHG-TR is a low-power, 3.3V AnyRate® Clock and Data Recovery (CDR) integrated circuit manufactured by Microchip Technology. It supports data rates from 32Mbps to 208Mbps for NRZ streams. The device features two on-chip PLLs: one for clock recovery and another for clock generation. It operates within an industrial temperature range of –40°C to +85°C and utilizes a 32-pin EPAD-TQFP package with NiPdAu lead finish.

Application Specific Clock/Timing Feature Summary

• Clock and data recovery for 32Mbps to 208Mbps NRZ data streams
• Dual on-chip PLLs for independent clock recovery and generation
• Differential PECL high-speed serial I/O with selectable reference frequencies
• Integrated link fault detection circuit

Application Specific Clock/Timing Applications

• SONET/SDH/ATM OC-1 and OC-3 systems
• Fast Ethernet and SMPTE 259 applications
• Proprietary architecture up to 208Mbps

Application Specific Clock/Timing Procurement Notes

Verify the component origin as Micrel, Inc., now part of Microchip Technology. Confirm the suffix -TR indicates reel packaging. Ensure the ordering suffix HG corresponds to the 32-pin EPAD-TQFP package type. Check RoHS compliance status and moisture sensitivity classification before procurement.

Application Specific Clock/Timing Selection Notes

Select this component for designs requiring protocol-independent CDR at speeds up to 208Mbps. The 32-pin TQFP package is preferred over the 28-pin SOIC variant for new designs due to thermal performance. Ensure power supply voltage remains between 3.15V and 3.45V for proper operation.

Application Specific Clock/Timing Part Context

The SY87700ALHG-TR belongs to the SY87700AL family of AnyRate® CDRs. It is functionally similar to the SY87700V but offers approximately 30% lower power consumption. The 'HG' suffix specifically denotes the 32-pin EPAD-TQFP package configuration.

Application Specific Clock/Timing Replacement Considerations

The SY87700VHC is a compatible alternative within the same family. Verify pinout compatibility and power requirements when substituting. The SY87701AL serves as a higher-speed replacement for applications exceeding 208Mbps.

Application Specific Clock/Timing FAQ

What is the maximum data rate supported by the SY87700AL?

The device supports data rates from 32Mbps up to 208Mbps for NRZ data streams.

How does the device handle loss of signal?

It uses a link fault indication circuit that forces the PLL to lock onto the local reference clock if the incoming data frequency deviates by more than approximately 1000ppm.

What are the input/output logic types?

The device features differential PECL high-speed serial I/O and TTL-compatible control inputs and outputs.