ACS8525A中文资料LC / P的SONET / SDH系统线路卡保护开关数据手册Semtech规格书

特性 Features

·SONET/SDH applications up to OC-3/STM-1 bit rate.
·Switches between grouped inputs (SEC/Sync pairs).
·Inputs: three SECs at any of 2, 4, 8 kHz (and N x 8 kHz multiples up to 155.52 MHz), plus Frame Sync/Multi-Frame Sync.
·Outputs: two SEC clocks at any of several spot frequencies from 2 kHz up to 77.76 MHz via the TTL/CMOS port and up to 311.04 MHz via the PECL/LVDS port.
·Selectable clock I/O port technologies.
·Modes for E3/DS3 and multiple E1/DS1 rate output clocks.
·Frequency translation of SEC input clock to a different local line card clock.
·Robust input clock source activity monitoring on all inputs.
·Supports Free-run, Locked and Digital Holdover modes of operation.
·Automatic “Hit-less” source switchover on loss of input.
·External force fast switch between SEC1/SEC2 inputs.
·Phase Build-out for output clock phase continuity during input switchover.
·PLL “Locked” and “Acquisition” bandwidths individually selectable from 18, 35 or 70 Hz.
·Serial interface for device set-up.
·Single 3.3 V operation.
·Operating temperature (ambient) of 0 to +70°C.
·Available in LQFP 64 package.
·Lead (Pb)-free version available (ACS8525T), RoHS and WEEE compliant.