ACS8522A

ACS8522A SETS LITE Synchronous Equipment Timing Source for Stratum 3/4E/4 and SMC Systems COMMUNICATIONS ADVANCED COMMS & SENSING www.DataSheet4U.com Description FINAL Features DATASHEET The ACS8522A is a highly integrated, single-chip solution for the Synchronous Equipment Timing Source (SETS) function in a SONET or SDH Network Element. The device generates SONET or SDH Equipment Clocks (SEC) and Frame Synchronization clocks. The ACS8522A is fully compliant with the required international specifications and standards. The device supports Free-run, Locked and Holdover modes, with mode selection controlled either automatically by an internal state machine or forced by register configuration. The ACS8522A accepts up to four independent input SEC reference clock sources from Recovered Line Clock, PDH network, and Node Synchronization. The ACS8522A generates independent SEC and BITS clocks, an 8 kHz Frame Synchronization clock and a 2 kHz Multi-Frame Synchronization clock, both with programmable pulse width and polarity. The ACS8522A includes a Serial Port, which can be SPI compatible, providing access to the configuration and status registers for device setup. The ACS8522A supports IEEE 1149.1 [5] ‹ Suitable for Stratum 3, 4E, 4 and SONET Minimum Clock (SMC) or SONET/SDH Equipment Clock (SEC) applications (to Telcordia 1244-CORE[19] Stratum 3 and GR-253[17], and ITU-T G.813[11] Options Ι and ΙΙ specifications). ‹ Accepts four individual input reference clocks, all with robu...