參數(shù)資料
型號(hào): SM3E-19.44M
廠商: Connor-Winfield
文件頁(yè)數(shù): 26/36頁(yè)
文件大?。?/td> 0K
描述: IC MOD TIMING 19.440MHZ STRAT 3E
標(biāo)準(zhǔn)包裝: 1
系列: SM3
類(lèi)型: 定時(shí)模塊,系統(tǒng)時(shí)鐘
PLL:
主要目的: 以太網(wǎng),ADM,DSLAM,SONET/SDH,Stratum,TDM
輸入: LVCMOS
輸出: LVCMOS
電路數(shù): 1
比率 - 輸入:輸出: 8:3
差分 - 輸入:輸出: 無(wú)/無(wú)
頻率 - 最大: 19.44MHz
電源電壓: 3.135 V ~ 3.465 V
工作溫度: 0°C ~ 70°C
安裝類(lèi)型: 通孔
封裝/外殼: 32-DIP 模塊
包裝: 管件
其它名稱(chēng): CW643
SM3E 19.44M
SM3E19.44M
SM3E Data Sheet #:
TM054
Page 32 of 36 Rev: 04 Date: 01/26/11
Copyright 2011 The Connor-Winfield Corp. All Rights Reserved
Specifications subject to change without notice
Required External Components
1. Placeseriesresistors(33ohms)onallreferenceinputs(Pins4-7&15-18).
2. Placeseriesresistors(33ohms)onSPI_INandSPI_CLKinputs(Pins25,26).
3. Placeone.01uFandone47-100uFcapacitorattheinputpowerpin(Pin27).
4. One4.7uF(25V)capacitorisrequiredattheVPPpin(Pin14).
5. One4.7uF(25V)capacitorisrequiredattheVPNpin(Pin19).
PCB Layout Recommendations
1. Orientmodulesoairflowisparallelalongtheheaderstrips(pins).
2. Placede-couplingand/orfiltercomponentsasclosetomodulepinsaspossible.
3. DonotplaceanycomponentsdirectlybeneaththemoduleonthetopsideofthehostPCB.
4. Ensurethatonlycleanandwell-regulatedpowerissuppliedtothemodule.
5. Isolatepowerandgroundinputstothemodulefromnoisysources.
6. Providepowerandgroundconnectionsthrougha0.050”widetrace(minimum)using1-oz.Cuorequivalentcopperfeature
(i.e.internalplane,copperareafill,etc.).
7. Keepmodulesignalsawayfromsensitiveornoisyanaloganddigitalcircuitry.
8. Avoidsplitgroundplanesashigh-frequencyreturncurrentsmaybeaffected.
9. Allowextraspacingbetweentracesofhigh-frequencyinputsandoutputs.
10. Keepalltracesasshortaspossible-avoidmeanderingtracepaths.
11. AvoidroutingsignalsdirectlybeneaththemoduleonthetopsideofthehostPCB.
12. Ifpossible,provideacopperareadirectlybeneaththemoduleonthetopsideofthehostPCB.Connectthiscopperareato
ground.
13. ItisrecommendedthattheconnectionsoftheJTAG,VPPandVPNpinsberoutedtopads,preferablyinaSILpatternasshown
inFigure12below.Itisrecommendedtouse0.1”centertocenterspacing.
Optional Socket Mounting Recommendations
MatingsocketsmaybeusedifpermanentinstallationoftheSM3moduleisnotdesired.Twopossiblesourcesforthesesockets
include:
1.
Samtec,“LowProfileSocketStrips”,SLSeries,PNSL-116-G-19.(http://www.samtec.com/)
2.
Mill-Max,“Single-In-LineSockets”,315Series,PN315-xx-116-41-001.(http://www.mill-max.com/)
TheSM3Erequirestwo16-pinsockets.TheoptionaldualfootprintconfigurationshowninFigure13requiresone14-pinandtwo16-
pinsockets.
Mechanical Specifications continued
1
8
V
PP
V
PN
GND
TCK
TDI
TDO
TM
S
RCK
Figure 12
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