参数资料
型号: SM3E-19.44M
厂商: Connor-Winfield
文件页数: 22/36页
文件大小: 0K
描述: IC MOD TIMING 19.440MHZ STRAT 3E
标准包装: 1
系列: SM3
类型: 定时模块,系统时钟
PLL:
主要目的: 以太网,ADM,DSLAM,SONET/SDH,Stratum,TDM
输入: LVCMOS
输出: LVCMOS
电路数: 1
比率 - 输入:输出: 8:3
差分 - 输入:输出: 无/无
频率 - 最大: 19.44MHz
电源电压: 3.135 V ~ 3.465 V
工作温度: 0°C ~ 70°C
安装类型: 通孔
封装/外壳: 32-DIP 模块
包装: 管件
其它名称: CW643
SM3E 19.44M
SM3E19.44M
SM3E Data Sheet #:
TM054
Page 29 of 36 Rev: 04 Date: 01/26/11
Copyright 2011 The Connor-Winfield Corp. All Rights Reserved
Specifications subject to change without notice
Phase Build-out Operation
General:Themodule,whenlockedtoareferencemaintainsafixedphaserelationshipbetweenitsinputandoutputsignals.Thephase
detectorusedinthePLLdeterminesthisrelationship.Typically,thePLLwouldrecognizeaphasechangeintheinputreferenceand
adjusttheoscillatorcontroltomaintainthesameinputoutputrelationship.ThePLLcanbeprogrammedtoignoretheinputphase
changeandtherebycreateanewphaserelationshipbetweentheinputandtheoutputsignals.Thisisparticularlyusefulinsome
applicationswhereitisnotdesirabletopassphasehitsontheinputsthroughtotheoutputs.Thisprocessoflimitingorabsorbinga
phasehitisknownas“PhaseBuildOut”.
Requirements:Amodulethatsupportsphasebuild-outshouldmeetthefollowingrequirementsspecifiedinGR-1244,section5-7.
R5-15“Inputphase-timechangesof3.5usorgreateroveranintervaloflessthan0.1secondsorlessshallbebuilt-outbystratum2
and3Eclockstoreducetheresultingclockphase-timechangetolessthan50ns.
Phase-timechangesof1.0usorlessoveranintervalof0.1secondsshallnotbebuilt-out.”
R5-16“Stratum3,4Eand4clocksshallnotperformphasebuild-out.”
“Basedontheaboverequirement,phase-timechangesofmorethan1.0usbutlessthan3.5usthatoccuroveranintervaloflessthan
0.1secondsmayormaynotbebuilt-out”.
Themoduleshouldnotshowanyalarmsduringthephasebuild-outoperation.Alsothemoduleshouldbecapableoftolerating5to10
UIofjitteratDS1rate(3.2to6.4us)andnotperformanyphasebuild-out.
ModuleSetup:Themodule,bydefault,doesnothavephasebuild-outenabled.Itcanbeenabledbysettingthe“PHASEBUILD-OUT
OPTION”bit,whichisbit4ofBANDWIDTH_PBOregister(0x03).
Note:Phasebuild-outisnotthesameas“HitlessReferenceSwitching”eventhoughtheyaresimilarinimplementation.Whilephase
build-outisimplementedinstratum3Etimingmodulesandhigher,hitlessreferenceswitchingcanbeimplementedinanystratumlevel
timingmodulethatacceptstwoormorereferenceinputs.Also,phasebuild-outcanbeusedonlytobuild-outphasehitsthatexceed1
us,hitlessreferenceswitchinghasnosuchlimits.
Application Notes continued
相关PDF资料
PDF描述
SM802104UMG TR IC SYNTHESIZER 2CH 24-QFN
SM802105UMG TR IC SYNTHESIZER 2CH 24-QFN
SM802108UMG IC SYNTEHSIZER 156.25MHZ 24QFN
SM802109UMG TR IC SYNTHESIZER QUAD 100MHZ 24QFN
SM840002KA TR IC CLK SYNTHESIZER LN 16-TSSOP
相关代理商/技术参数
参数描述
SM3F-100TQ-ACTEL 功能描述:ADAPTER MODULE 100TQFP RoHS:否 类别:编程器,开发系统 >> 适配器 系列:* 标准包装:96 系列:- 模块/板类型:TQFP 插座模块 适用于相关产品:-
SM3F-100VQ-ACT 制造商:Microsemi Corporation 功能描述:ACTEL VQ100 ADAPTER MODULES
SM3F-100VQ-ACTEL 功能描述:ADAPTER MODULE 100VQFP RoHS:否 类别:编程器,开发系统 >> 适配器 系列:* 标准包装:96 系列:- 模块/板类型:TQFP 插座模块 适用于相关产品:-
SM3F-108QN-ACTEL 功能描述:ADAPTER MODULE 108QFN RoHS:否 类别:编程器,开发系统 >> 适配器 系列:* 标准包装:96 系列:- 模块/板类型:TQFP 插座模块 适用于相关产品:-
SM3F-121CS-ACTEL 功能描述:ADAPTER MODULE 121CSP RoHS:否 类别:编程器,开发系统 >> 适配器 系列:* 标准包装:96 系列:- 模块/板类型:TQFP 插座模块 适用于相关产品:-