文本内容:
3.1The uprobablyncases maycause damageto thegate ifsustained.a0b0c1d probably0e undefinedf probably0g1h probably
13.7A CMOSNAND gateuses fourtransistors:two p-channel transistorsand G
3.207two/7-channel transistors
3.20Using themaximum outputcurrent ratingsin bothstates,the HlGH-state marginis
0.69Vthe LOW-statemargin is
1.02V.With CMOSloads outputcurrents lessthan20|JL A,the marginsimprove to
1.349V and
1.25V,respectively.
3.25For the74HC00,,while forthe74ALS00,.Therefore,the LOW-state fanoutis
20.For the74HC00,,while forthe74ALS00,.Therefore,theHIGH—state fanoutis
200.The overallfanout Isthe minimumof thesetwo numbers,or
20.ADHmax=4mA./Lmax=-
0.2mA/DHmax=-4mA ZHmax=
0.02mA
3.49Low-state High-state OverallExcessCase RatioFanout RatioFanout FanoutState Drive74LS driving74AS1620168mA
0.5mA400uA20/A HIGH80uA74LS driving74F8mA13400HA2013HIGH140HA
0.6mA20pA74F driving74LS20mA50lOOOuA5050none
0.4mA20pA74F driving74AS20mA40lOOOuA5040HIGH200gA
0.5mA20g A74AS driving74S20mA2mA102000uA4010HIGH1500pA50HA74S driving74ALS20mA100lOOOjA5050LOW10mA
0.2mA20pA74ALS driving74S8mA4400VA84HIGH200pA2mA50pA74F driving74F20mA33lOOPpA5033HIGH340HA
0.6mA20pA74S driving74S10201020mA2mA lOOOuAHIGH500|1A50jiA74S driving74F20mA33IOPOJA5033HIGH340〃A
0.6mA2011A74F driving74ALS20mA100IQOOUA5050LOW10mA
0.2mA20pA74AS driving74LS501005020mA2000NA HIGH1000gA
0.4mA20pA
3.56LOW-state HIGH-stateV VuV OLmaxTMargin VOHminTMarginCase ILmaxv IHmin74HCT driving74LS
0.8V
0.33V
0.47V
2.0V
3.84V
1.84V74ALS driving74HCT
0.8V
0.5V
0.3V
2.0V
2.7V
0.7V74AS driving74VHCT
0.8V
0.5V
0.3V
2.0V
2.7V
0.7V74VHCT driving74F
0.8V
0.44V047V
2.0V
3.80V
1.80V。
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