ACS8530T

The Semtech ACS8530T is a highly integrated, single-chip solution designed for the Synchronous Equipment Timing Source (SETS) function within SONET or SDH Network Elements. This device is fully compliant with required international specifications and standards, making it suitable for Stratum 2, 3E, 3, 4E, and 4 applications, as well as SONET Minimum Clock (SMC) or SONET/SDH Equipment Clock (SEC) requirements.

The ACS8530T supports Free-run, Locked, and Holdover modes, accepting up to 14 individual input reference clocks with robust quality monitoring. It simultaneously generates nine output clocks and two sync pulse outputs. Key electrical features include a programmable PLL bandwidth from 0.5 mHz to 70 Hz, automatic hit-less source switchover, and phase transient protection. The device operates from a single 3.3V supply and is 5V tolerant.

Designed for system protection, two ACS8530 devices can be configured in a Master/Slave setup. A microprocessor port provides access to configuration and status registers, and the device supports IEEE 1149.1 JTAG boundary scan. The ACS8530T is available in a 100-LQFP package and features a lead (Pb)-free version that is RoHS and WEEE compliant.

This SETS IC is crucial for generating SONET or SDH Equipment Clocks (SEC) and Frame Synchronization clocks, ensuring precise timing in telecommunications infrastructure. Its holdover accuracy is better than 3 x 10^-10 (manual) and 7.5 x 10^-14 (instantaneous).