Description

The ACS8595 ATCA is a highly integrated, single-chip solution for “Hit-less” protection switching of SEC (SDH/SONET Equipment Clock) + Sync clock “Groups”, from Master and Slave SETS clock cards and a third (Stand-by) source, for line cards/blades in a SONET or SDH ATCA (Advanced Telecommuncications Computing Architecture) Network Element.

Features

◆ SONET/SDH applications up to OC-3/STM-1 bit rates

◆ 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/MultiFrame Sync

◆ Outputs: Six 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

◆ Modes for E3/DS3 and multiple E1/DS1 rate output clocks

◆ Generates 8 kHz Frame Sync and 2 kHz Multi-Frame Sync output clocks with programmable pulse width and polarity

◆ Frequency translation of SEC input clock to different local line card clocks

◆ Robust activity monitoring on all clock 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

◆ IEEE 1149.1 JTAG Boundary Scan is supported.

◆ Single 3.3 V operation, 5 V I/O compatible

◆ Operating temperature (ambient) of -40 to +85°C

◆ Available in 100-pin LQFP package

◆ Lead (Pb)-free version (ACS8595T), RoHS and WEEE compliant