ACS8510REV2.1T

Overview

The Semtech ACS8510 Rev2.1 is a highly integrated, single-chip Synchronous Equipment Timing Source (SETS) designed for SONET and SDH network elements. It generates SONET/SDH Equipment Clocks (SEC), BITS clocks, an 8 kHz Frame Synchronization clock, and a 2 kHz Multi-Frame Synchronization clock. The device supports Free-run, Locked, and Holdover modes with automatic hit-less source switchover. It accepts up to 14 independent input reference clocks and provides 11 output clocks. Key features include programmable wander/jitter tracking attenuation from 0.1 Hz to 20 Hz, Master/Slave redundancy configuration, and IEEE 1149.1 JTAG boundary scan support. It operates on a single +3.3 V supply with +5 V I/O compatibility.

Feature Summary

• Generates SEC, BITS, 8 kHz FrSync, and 2 kHz MFrSync clocks compliant with Stratum 3E, 3, 4E, and 4 standards.
• Supports 14 input reference sources and 11 output ports with robust quality monitoring and automatic switchover.
• Includes microprocessor interface supporting Intel, Motorola, Serial, Multiplexed, and EPROM modes.
• Rev2.1 adds edge alignment choice for 8 kHz input and low jitter n x E1/DS1 output mode.

Applications

• SONET or SDH Network Element timing synchronization
• Stratum 3E, 3, 4E, and 4 Equipment Clock (SEC) applications
• Master/Slave redundant timing system configurations

Procurement Notes

Verify the specific revision suffix 'REV2.1T' against the manufacturer's ordering information to confirm package type and temperature range. Ensure the component meets the required Telcordia GR-1244-CORE and ITU-T G.813 specifications for the target network element application.

Selection Notes

Select this device for applications requiring compliance with AT&T, ITU-T, ETSI, and Telcordia specifications. Consider the Rev2.1 updates for improved edge alignment and low jitter outputs if utilizing E1/DS1 interfaces. Verify that the 100-pin LQFP package fits the PCB layout constraints.

Part Context

The ACS8510 is part of Semtech’s Advanced Communications portfolio for synchronous equipment timing. The Rev2.1 update specifically enhances functionality for E1/DS1 interfaces and provides additional configuration options for frame synchronization inputs compared to earlier revisions.

Replacement Considerations

The ACS8510A is a related SETS device in the same family. Verify pinout compatibility and feature parity before substitution, as differences in output configurations or interface support may exist between the ACS8510 and ACS8510A models.