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电源-upconsiderations
SN74AVC2T45
双-bitdual-supplybustransceiver
withconfigurablevoltagetranslationand3-stateoutputs
SCES531F–DECEMBER2003–REVISEDMAY2005
aproperpower-upsequencealwaysshouldbefollowedtoavoidexcessivesupplycurrent,buscontention,
振动,orotheranomalies.toguardagainstsuchpower-upproblems,takethefollowingprecautions:
1.connectgroundbeforeanysupplyvoltageisapplied.
2.powerupv
CCA
.
3.v
CCB
canberampedupalongwithorafterV
CCA
.
table1.typicaltotalstaticpowerconsumption(i
CCA
+I
CCB
)
V
CCA
V
CCB
单位
0v1.2v1.5v1.8v2.5v3.3v
0V
0<0.5<0.5<0.5<0.5<0.5
1.2v
<0.5<1<1<1<11
1.5v
<0.5<1<1<1<11
µ
一个
1.8v
<0.5<1<1<1<1<1
2.5v
<0.51<1<1<1<1
3.3v
<0.51<1<1<1<1
9
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