品牌：SEMTECH

批號：17+

數(shù)量:10000

封裝:QFP

價格:面議

說明：全新原裝現(xiàn)貨，可出樣品

IC特征： Description Features

Block Diagram

The ACS8515 is a highly integrated, single-chip

solution for ‘hit-less’ protection switching of SEC

clocks from Master and Slave SETS clockcards

in a SONET or SDH Network Element. The

ACS8515 has fast activity monitors on the inputs

and will implement automatic system protection

switching against master clock failure.

A further input is provided for an optional standby

SEC clock. The ACS8515 is fully compliant with

the required specifications and standards.

The ACS8515 can perform frequency translation

from a SEC input clock distributed along a back

plane to a different local line card clock, e.g.

8 kHz distributed on the back plane and

19.44 MHz generated on the line cards.

An SPI(1) compatible serial port is incorporated,

providing access to the configuration and status

registers for device setup.

The ACS8515 can utilise either a low cost XO

oscillator module, or a TCXO with full temperature

calibration - as required by the application.

Rev2.1 adds choice of edge alignment for 8kHz

input, as well as a low jitter n x E1/DS1 output

mode. Other minor changes are made, with all

described in Appendix A.

ADVANCED COMMUNICATIONS FINAL

Revision 2.01/December 2005 ?Semtech Corp. www.semtech.com

?Suitable for Stratum 3, 4E and 4 SONET

or SDH Equipment Clock (SEC) applications

?Meets AT&T, ITU-T, ETSI and Telcordia

specifications

?Three SEC input clocks, from 2 kHz to

155.52 MHz

?Generates two SEC output clocks, up to

311.04 MHz

?Frequency translation of SEC input clock to a

different local line card clock

?Robust input clock source frequency and

activity monitoring on all inputs

?Supports Free-run, Locked and Holdover

modes of operation

?Automatic ‘hit-less’ source switchover on loss

of input

?External force fast switch between SEC inputs

?Phase build out for output clock phase

continuity during input switchover

?SPI(1) compatible serial microprocessor interface

?Programmable wander and jitter tracking

attenuation 0.1 Hz to 20 Hz

?Single +3.3 V operation. +5 V I/O compatible

?Operating temperature (ambient) -40°C to

+85°C

?Available in 64 pin LQFP package

?Lead (pb)-free version available (ACS8

聯(lián)系人:程小姐

手機:15919480276

電話:0755- 21015360 & 23038182

傳真:0755-23038182

地址:深圳市福田區(qū)振華路海外裝飾大廈綜合大樓2棟B段4樓4014B-33C