ACS8522BT中文资料同步设备定时源为3/ 4E／4，SMC和以太网系统数据手册Semtech规格书

特性 Features

·Suitable for Stratum 3, 4E, 4 and SONET Minimum Clock (SMC) or SONET/SDH Equipment Clock (SEC) and Ethernet applications.
·Meets Telcordia 1244-CORE Stratum 3 and GR-253, and ITU-T G.813 Options I and II and ITU-T G.8262 (Draft) specifications.
·Accepts four individual input reference clocks, all with robust input clock source quality monitoring.
·Simultaneously generates four output clocks, plus two Sync pulse outputs.
·Generates four Ethernet frequencies (25 Mhz, 50 MHz, 62.5 MHz and 125 MHz) on any combination of four TO outputs.
·Absolute holdover accuracy better than 3 x 10-10 (manual), 7.5 x 10-14 (instantaneous); Holdover stability defined by choice of external XO.
·Programmable PLL bandwidth, for wander and jitter tracking/attenuation, 0.1 Hz to 70 Hz in 10 steps.
·Automatic hit-less source switchover on loss of input.
·Serial SPI compatible interface.
·Output phase adjustment in 6 ps steps up to ±200 ns.
·IEEE 1149.1 JTAG Boundary Scan.
·Single 3.3 V operation.
·Lead (Pb)-free, Halogen free, RoHS and WEEE compliant.