MM74HC42资料

MMHC42󰁋MM74HC42BCD-to-DecimalDecoderJanuary1988

MMHC42󰁋MM74HC42BCD-to-DecimalDecoder

GeneralDescription

Thisdecoderutilizesadvancedsilicon-gateCMOStechnol-ogy󰀟Dataonthefourinputpinsselectoneofthe10outputscorrespondingtothevalueoftheBCDnumberonthein-puts󰀟Anoutputwillgolowwhenselected󰀷otherwiseitre-mainshigh󰀟IftheinputdataisnotavalidBCDnumberalloutputswillremainhigh󰀟ThecircuithashighnoiseimmunityandlowpowerconsumptionusuallyassociatedwithCMOScircuitry󰀷yetalsohasspeedscomparabletolowpowerSchottkyTTL(LS-TTL)circuits󰀷andiscapableofdriving10LS-TTLequivalentloads󰀟

Allinputsareprotectedfromdamageduetostaticdis-chargebydiodestoVCCandground󰀟

Features

YYYY

Typicalpropagationdelay󰀌15nsWidesupplyrange󰀌2V–6V

Lowquiescentcurrent󰀌80mA(74HC)Fanoutof10LS-TTLloads

ConnectionDiagram

Dual-in-linePackage

TruthTable

No󰀦󰀵󰁸󰀜󰁁󰀧󰁇󰀷󰁚󰀅󰀻

InputsDCBA0LLLLLLLLLHLLLHH

HHHLLLLHHHH

LLHHLLHHLLHHLLHH

LHLHLHLHLHLHLHLH

LHHHHHHHHHHHHHHH

1HLHHHHHHHHHHHHHH

2HHLHHHHHHHHHHHHH

3HHHLHHHHHHHHHHHHOutputs4HHHHLHHHHHHHHHHH

5HHHHHLHHHHHHHHHH

6HHHHHHLHHHHHHHHH

7HHHHHHHLHHHHHHHH

8HHHHHHHHLHHHHHHH

9HHHHHHHHHLHHHHHH

TL󰁋F󰁋5301–1

TopView

OrderNumberMMHC42orMM74HC42

HHH

INVALID

HHH

HeHighLevel󰀷LeLowLevel

LogicDiagram

TL󰁋F󰁋5301–2

C1995NationalSemiconductorCorporationTL󰁋F󰁋5301RRD-B30M105󰁋PrintedinU󰀟S󰀟A󰀟

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AbsoluteMaximumRatings(Notes1󰁅2)

IfMilitary󰁋Aerospacespecifieddevicesarerequired󰀷pleasecontacttheNationalSemiconductorSalesOffice󰁋Distributorsforavailabilityandspecifications󰀟SupplyVoltage(VCC)DCInputVoltage(VIN)DCOutputVoltage(VOUT)ClampDiodeCurrent(IIK󰀷IOK)

b0󰀟5toa7󰀟0Vb1󰀟5toVCCa1󰀟5Vb0󰀟5toVCCa0󰀟5V

g20mA

OperatingConditions

SupplyVoltage󰀉VCC󰁍DCInputorOutputVoltage󰀉VIN󰁎VOUT󰁍

OperatingTemp󰀟Range(TA)MM󰁚󰀧HCMM󰁇󰀧HC

InputRiseorFallTimes󰀉tr󰁎tf󰁍VCCe󰀜󰀥󰀵V

VCCe󰀧󰀥󰁇VVCCe󰀷󰀥󰀵V

Min󰀜󰀵

Max󰀷VCC

UnitsVV

g25mADCOutputCurrent󰀷perpin(IOUT)

g50mADCVCCorGNDCurrent󰀷perpin(ICC)

b65󰀆Ctoa150󰀆CStorageTemperatureRange(TSTG)

PowerDissipation(PD)(Note3)600mWS󰀟O󰀟Packageonly500mWLeadTemp󰀟(TL)(Soldering10seconds)260󰀆C

b󰀧󰀵

b󰁇󰁇a󰀅󰁇a󰁸󰀜󰁇󰀆C󰀆C

nsnsns

󰁸󰀵󰀵󰀵󰁇󰀵󰀵󰀧󰀵󰀵

DCElectricalCharacteristics(Note4)

SymbolVIH

ParameterMinimumHighLevelInputVoltageMaximumLowLevelInputVoltage󰀮󰀮MinimumHighLevelOutputVoltage

VINeVIHorVILlIOUTls󰀜󰀵mAConditions

VCC󰀜󰀥󰀵V󰀧󰀥󰁇V󰀷󰀥󰀵V󰀜󰀥󰀵V󰀧󰀥󰁇V󰀷󰀥󰀵V󰀜󰀥󰀵V󰀧󰀥󰁇V󰀷󰀥󰀵V󰀧󰀥󰁇V󰀷󰀥󰀵V󰀜󰀥󰀵V󰀧󰀥󰁇V󰀷󰀥󰀵V󰀧󰀥󰁇V󰀷󰀥󰀵V󰀷󰀥󰀵V󰀷󰀥󰀵V

󰀜󰀥󰀵󰀧󰀥󰁇󰀷󰀥󰀵󰀧󰀥󰀜󰁇󰀥󰁚󰀵󰀵󰀵󰀵󰀥󰀜󰀵󰀥󰀜TAe25󰀆CTyp

󰁸󰀥󰁇󰁁󰀥󰁸󰁇󰀧󰀥󰀜󰀵󰀥󰁇󰁸󰀥󰁁󰁇󰁸󰀥󰀅󰁸󰀥󰀻󰀧󰀥󰀧󰁇󰀥󰀻󰁁󰀥󰀻󰀅󰁇󰀥󰀧󰀅󰀵󰀥󰁸󰀵󰀥󰁸󰀵󰀥󰁸󰀵󰀥󰀜󰀷󰀵󰀥󰀜󰀷

g󰀵󰀥󰁸

74HC

TAeb40to85󰀆C

󰁸󰀥󰁇󰁁󰀥󰁸󰁇󰀧󰀥󰀜󰀵󰀥󰁇󰁸󰀥󰁁󰁇󰁸󰀥󰀅󰁸󰀥󰀻󰀧󰀥󰀧󰁇󰀥󰀻󰁁󰀥󰀅󰀧󰁇󰀥󰁁󰀧󰀵󰀥󰁸󰀵󰀥󰁸󰀵󰀥󰁸󰀵󰀥󰁁󰁁󰀵󰀥󰁁󰁁

g󰁸󰀥󰀵

HC

TAeb55to125󰀆C

󰁸󰀥󰁇󰁁󰀥󰁸󰁇󰀧󰀥󰀜󰀵󰀥󰁇󰁸󰀥󰁁󰁇󰁸󰀥󰀅󰁸󰀥󰀻󰀧󰀥󰀧󰁇󰀥󰀻󰁁󰀥󰁚󰁇󰀥󰀜󰀵󰀥󰁸󰀵󰀥󰁸󰀵󰀥󰁸󰀵󰀥󰀧󰀵󰀥󰀧

g󰁸󰀥󰀵

UnitsVVVVVVVVVVVVVVVVmAmA

GuaranteedLimits

VIL

VOH

VINeVIHorVILlIOUTls󰀧󰀥󰀵mAlIOUTls󰁇󰀥󰀜mA

VOL

MinimumLowLevelOutputVoltage

VINeVIHorVILlIOUTls󰀜󰀵mA

VINeVIHorVILlIOUTls󰀧󰀥󰀵mAlIOUTls󰁇󰀥󰀜mA

IINICC

MaximumInputCurrent

MaximumQuiescentSupplyCurrent

VINeVCCorGNDVINeVCCorGNDIOUTe󰀵mA

󰀅󰀥󰀵󰀅󰀵󰁸󰀷󰀵

Note1󰀌AbsoluteMaximumRatingsarethosevaluesbeyondwhichdamagetothedevicemayoccur󰀟Note2󰀌Unlessotherwisespecifiedallvoltagesarereferencedtoground󰀟

Note3󰀌PowerDissipationtemperaturederating󰁚plastic‘‘N’’package󰀌b12mW󰁋󰀆Cfrom65󰀆Cto85󰀆C󰀥ceramic‘‘J’’package󰀌b12mW󰁋󰀆Cfrom100󰀆Cto125󰀆C󰀟Note4󰀌Forapowersupplyof5Vg10%theworstcaseoutputvoltages(VOH󰀷andVOL)occurforHCat4󰀟5V󰀟Thusthe4󰀟5Vvaluesshouldbeusedwhendesigningwiththissupply󰀟WorstcaseVIHandVILoccuratVCCe5󰀟5Vand4󰀟5Vrespectively󰀟(TheVIHvalueat5󰀟5Vis3󰀟85V󰀟)Theworstcaseleakagecurrent(IIN󰀷ICC󰀷andIOZ)occurforCMOSatthehighervoltageandsothe6󰀟0Vvaluesshouldbeused󰀟

󰀮󰀮VILlimitsarecurrentlytestedat20%ofVCC󰀟TheaboveVILspecification(30%ofVCC)willbeimplementednolaterthanQ1󰀷CY’󰀟

2

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ACElectricalCharacteristicsVCCe5V󰀷TAe25󰀆C󰀷CLe15pF󰀷tretfe6ns

SymboltPHL󰀷tPLH

ParameterMaximumPropagationDelay

Conditions

Typ15

Guaranteed

Limit

25

Unitsns

ACElectricalCharacteristicsVCCe2󰀟0Vto6󰀟0V󰀷CLe50pF󰀷tretfe6ns(unlessotherwisespecified)

SymboltPHL󰁎tPLH

ParameterMaximumPropagationDelay

MaximumOutputRiseandFallTimePowerDissipationCapacitance󰀉Note󰁇󰁍MaximumInputCapacitance

󰀉perpackage󰁍Conditions

VCC󰀜󰀥󰀵V󰀧󰀥󰁇V󰀷󰀥󰀵V󰀜󰀥󰀵V󰀧󰀥󰁇V󰀷󰀥󰀵V

TAe25󰀆CTyp󰁚󰁇󰁸󰁚󰁸󰁇󰁁󰀵󰀅󰁚󰀷󰀜󰁇

󰁸󰀵

󰁸󰀵

󰁸󰀵

󰁸󰁇󰀵󰁁󰀵󰀜󰀷󰁚󰁇󰁸󰁇󰁸󰁁

74HC

TAeb40to85󰀆C

󰁸󰀅󰀻󰁁󰀅󰁁󰀜󰀻󰁇󰁸󰀻󰁸󰀷

HC

TAeb55to125󰀆C

󰀜󰀜󰀧󰀧󰁇󰁁󰀅󰁸󰁸󰀵󰀜󰀜󰁸󰀻

UnitsnsnsnsnsnsnspFpF

GuaranteedLimits

tTLH󰁎tTHL

CPDCIN

Note5󰀌CPDdeterminesthenoloaddynamicpowerconsumption󰀷PDeCPDVCC2faICCVCC󰀷andthenoloaddynamiccurrentconsumption󰀷ISeCPDVCCfaICC󰀟

3

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MMHC42󰁋MM74HC42BCD-to-DecimalDecoderPhysicalDimensionsinches(millimeters)

OrderNumberMMHC42JorMMHC42J

NSPackageJ16A

OrderNumberMMHC42N

NSPackageN16E

LIFESUPPORTPOLICY

NATIONAL’SPRODUCTSARENOTAUTHORIZEDFORUSEASCRITICALCOMPONENTSINLIFESUPPORTDEVICESORSYSTEMSWITHOUTTHEEXPRESSWRITTENAPPROVALOFTHEPRESIDENTOFNATIONALSEMICONDUCTORCORPORATION󰀟Asusedherein󰀌1󰀟Lifesupportdevicesorsystemsaredevicesorsystemswhich󰀷(a)areintendedforsurgicalimplantintothebody󰀷or(b)supportorsustainlife󰀷andwhosefailuretoperform󰀷whenproperlyusedinaccordancewithinstructionsforuseprovidedinthelabeling󰀷canbereasonablyexpectedtoresultinasignificantinjurytotheuser󰀟

NationalSemiconductorCorporation1111WestBardinRoad2󰀟Acriticalcomponentisanycomponentofalifesupportdeviceorsystemwhosefailuretoperformcanbereasonablyexpectedtocausethefailureofthelifesupportdeviceorsystem󰀷ortoaffectitssafetyoreffectiveness󰀟

NationalSemiconductorEuropeFax󰀌(a49)0-180-5308586NationalSemiconductorLtd󰀟13thFloor󰀷StraightBlock󰀷NationalSemiconductorJapanLtd󰀟Tel󰀌81-043-299-2309