SY69753ALHG

Application Specific Clock/Timing Overview

The SY69753ALHG is a Clock and Data Recovery (CDR) integrated circuit designed for OC-3/STS-3 applications at 155Mbps NRZ data rates. It operates on a single 3.3V power supply with a typical current consumption of 120mA to 160mA. The device features two internal Phase-Locked Loops (PLLs): one for clock recovery from the serial data stream and another for frequency synthesis using a reference clock. It provides differential PECL outputs for recovered data and clocks, along with TTL-level control inputs and link fault indication.

Application Specific Clock/Timing Feature Summary

• Clock and data recovery for 125Mbps/155Mbps NRZ data streams
• Dual PLL architecture: one for clock recovery and one for frequency synthesis
• Differential PECL high-speed serial I/O with ECL 100K compatibility
• Link fault detection circuit with active HIGH LFIN output

Application Specific Clock/Timing Applications

• SONET/SDH/ATM OC-3 systems
• Ethernet media converters
• Proprietary architectures operating between 120Mbps and 180Mbps

Application Specific Clock/Timing Procurement Notes

Verify that the component is sourced from authorized distributors or directly from Micrel Technology to ensure authenticity. Confirm the package marking includes the Pb-Free bar-line indicator and NiPdAu lead finish as specified in the ordering information. Check for the specific industrial temperature range rating (-40°C to +85°C) during procurement validation.

Application Specific Clock/Timing Selection Notes

Select the SY69753ALHG when a complete CDR solution is required for 155Mbps NRZ signals without external buffering. Ensure the design supports differential PECL signaling and provides appropriate termination for unused outputs. Verify that the application requires the specific selectable divide ratios (8, 10, 16, 20) available via DIVSEL pins.

Application Specific Clock/Timing Part Context

The SY69753AL is part of Micrel's low-power clock recovery family, noted for being fully compatible with the SY87701V but consuming approximately 30% less power. It is manufactured by Micrel, Inc., which was acquired by Microchip Technology. The device is housed in a 32-pin EPAD-TQFP package (H32-1).

Application Specific Clock/Timing Replacement Considerations

The SY87701AL is listed as a related product offering similar low-power CDR functionality across a wider frequency range (28Mbps to 1300Mbps). No direct cross-reference substitutes are explicitly confirmed in the provided documentation.