品牌：SEMTECH
批号：17+
数量:10000
封装:QFP
价格:面议
说明：全新原装现货，可出样品
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
联系人:程小姐
手机:15919480276
电话:0755- 21015360 & 23038182
传真:0755-23038182
地址:深圳市福田区振华路海外装饰大厦综合大楼2栋B段4楼4014B-33C
