www.德州仪器.com
描述/orderinginformation(持续)
gql 或者 zql pACKAGE
(t运算 视图)
J
H
G
F
E
D
C
B
一个
21 3 4 65
K
abc
sn54lvth16245a,sn74lvth16245a
3.3-vabt16-bitbustransceivers
with3-stateoutputs
SCBS143Q–MAY1992–REVISEDOCTOBER2005
这'lvth16245adevicesare16-位(双-octal)noninverting3-statetransceiversdesignedforlow-电压
(3.3-v)v
CC
运作,butwiththecapabilitytoprovideattlinterfacetoa5-vsystemenvironment.
thedevicesaredesignedforasynchronouscommunicationbetweentwodatabuses.thelogiclevelsofthe
方向-控制(dir)inputandtheoutput-使能(oe)inputactivateeithertheb-portoutputsorthea-端口
outputsorplacebothoutputportsintothehigh-impedancemode.thedevicetransmitsdatafromtheabusto
thebbuswhentheb-portoutputsareactivated,andfromthebbustotheabuswhenthea-portoutputsare
使活动.theinputcircuitryonbothaandbportsisalwaysactiveandmusthavealogichighorlowlevel
appliedtopreventexcessI
CC
andI
CCZ
.
activebus-holdcircuitryholdsunusedorundriveninputsatavalidlogicstate.useofpulluporpulldownresistors
withthebus-holdcircuitryisnotrecommended.
WhenV
CC
isbetween0and1.5v,thedevicesareinthehigh-impedancestateduringpoweruporpowerdown.
不管怎样,toensurethehigh-impedancestateabove1.5v,oeshouldbetiedtov
CC
throughapullupresistor;
theminimumvalueoftheresistorisdeterminedbythecurrent-sinkingcapabilityofthedriver.
thesedevicesarefullyspecifiedforhot-insertionapplicationsusingi
止
andpower-up3-状态.thei
止
电路系统
disablestheoutputs,preventingdamagingcurrentbackflowthroughthedeviceswhentheyarepowereddown.
thepower-up3-statecircuitryplacestheoutputsinthehigh-impedancestateduringpowerupandpowerdown,
whichpreventsdriverconflict.
TERMINALASSIGNMENTS
(1)
(56-ballgql/zqlpackage)
123456
一个
1DIRNCNCNCNC1OE
B
1B21B1GNDGND1A11A2
C
1B41B3V
CC
V
CC
1A31A4
D
1B61B5GNDGND1A51A6
E
1B81B71A71A8
F
2B12B22A22A1
G
2B32B4GNDGND2A42A3
H
2B52B6V
CC
V
CC
2A62A5
J
2B72B8GNDGND2A82A7
K
2DIRNCNCNCNC2OE
abc
abc(1)nc–nointernalconnection
2
: 点此下载
