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54FCT373OctalTransparentLatchwithTRI-STATEOutputsOctober1999
54FCT373
OctalTransparentLatchwithTRI-STATE®Outputs
GeneralDescription
The’FCT373consistsofeightlatcheswithTRI-STATEout-putsforbusorganizedsystemapplications.Theflip-flopsap-peartransparenttothedatawhenLatchEnable(LE)isHIGH.WhenLEisLOW,thedatathatmeetsthesetuptimesislatched.DataappearsonthebuswhentheOutputEnable(OE)isLOW.WhenOEisHIGHthebusoutputisinthehighimpedancestate.
Features
nnnn
TRI-STATEoutputsforbusinterfacingTTLinputandoutputlevelcompatibleCMOSpowerconsumption
Outputsinkcapabilityof32mA,sourcecapabilityof12mA
nStandardMicrocircuitDrawing(SMD)5962-87401
OrderingCode
Military
54FCT373DMQB54FCT373FMQB54FCT373LMQB
PackageNumber
J20AW20AE20A
20-LeadCerpack
20-LeadCeramicLeadlessChipCarrier,TypeC
PackageDescription
20-LeadCeramicDual-In-Line
ConnectionDiagrams
PinAssignmentforDIPandFlatpak
PinAssignment
forLCC
DS100957-2
DS100957-1
PinNamesD0–D7LEOEO0–O7DescriptionDataInputsLatchEnableInput(ActiveHIGH)OutputEnableInput(ActiveLOW)TRI-STATELatchOutputs
TRI-STATE®isaregisteredtrademarkofNationalSemiconductorCorporation.
©1999NationalSemiconductorCorporationDS100957www.national.com
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54FCT373FunctionalDescription
The’FCT373containseightD-typelatcheswithTRI-STATEoutputbuffers.WhentheLatchEnable(LE)inputisHIGH,dataontheDninputsentersthelatches.Inthisconditionthelatchesaretransparent,i.e.,alatchoutputwillchangestateeachtimeitsDinputchanges.WhenLEisLOW,thelatchesstoretheinformationthatwaspresentontheDinputsasetuptimeprecedingtheHIGH-to-LOWtransitionofLE.TheTRI-STATEbuffersarecontrolledbytheOutputEnable(OE)input.WhenOEisLOW,thebuffersareinthebi-statemode.WhenOEisHIGHthebuffersareinthehighimpedancemodebutthisdoesnotinterferewithenteringnewdataintothelatches.
LEHHLX
InputsOELLLH
DnHLXX
OutputOnHL
On(nochange)
Z
H=HIGHVoltageLevelL=LOWVoltageLevelX=Immaterial
Z=HighImpedanceState
LogicDiagram
DS100957-3
Pleasenotethatthisdiagramisprovidedonlyfortheunderstandingoflogicoperationsandshouldnotbeusedtoestimatepropagationdelays.
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54FCT373AbsoluteMaximumRatings(Note1)
IfMilitary/Aerospacespecifieddevicesarerequired,pleasecontacttheNationalSemiconductorSalesOffice/Distributorsforavailabilityandspecifications.StorageTemperature
AmbientTemperatureunderBiasJunctionTemperatureunderBiasCeramic
VCCPinPotentialtoGroundPin
InputVoltage(Note2)InputCurrent(Note2)
VoltageAppliedtoAnyOutputintheDisabledorPower-OffState
−65˚Cto+150˚C−55˚Cto+125˚C−55˚Cto+175˚C−0.5Vto+7.0V−0.5Vto+7.0V−30mAto+5.0mA
intheHIGHState
CurrentAppliedtoOutputinLOWState(Max)
−0.5VtoVCCtwicetheratedIOL(mA)
RecommendedOperatingConditions
FreeAirAmbientTemperatureMilitary
SupplyVoltageMilitary
−55˚Cto+125˚C+4.5Vto+5.5V
Note1:Absolutemaximumratingsarevaluesbeyondwhichthedevicemaybedamagedorhaveitsusefullifeimpaired.Functionaloperationundertheseconditionsisnotimplied.
Note2:Eithervoltagelimitorcurrentlimitissufficienttoprotectinputs.
−0.5Vto+5.5V
DCElectricalCharacteristics
SymbolVIHVILVCDVOHVOLIIHIILIOZHIOZLIOSICCQ∆ICCICCTParameter
InputHIGHVoltageInputLOWVoltageInputClampDiodeVoltageOutputHIGHVoltageOutputLOWVoltage
54FCT54FCT54FCT54FCT
4.32.4
0.20.55−510-10−601.52.05.6
FCT240Min2.0
0.8−1.2Max
UnitsVVVVVVVµAµAµAµAmAmAmAmA
MinMinMinMinMinMaxMaxMaxMaxMaxMaxMaxMaxVCCConditions
RecognizedHIGHSignalRecognizedLOWSignalIIN=−18mAIOH=−300uAIOH=−12mAIOL=300µAIOL=32mAVIN=5.5VVIN=0.0VVIN=5.5VVIN=0.0VVOUT=0.0V
VIN=0.2VorVIN=5.3V
VIN=3.4V
VIN=3.4VorVIN=GND,OE=GND,fI=10Mhz,outputsopen,onebittoggling,50%dutycycleVIN=5.3VorVIN=0.2V,OE=GND,fI=10Mhz,outputsopen,onebittoggling,50%dutycycleOutputsOpen,OE=GND,onebittoggling,50%dutyCycle
InputHIGHCurrentInputLOWCurrent
HighImpedanceOutputCurrentHighImpedanceOutputCurrentOutputShort-CircuitCurrentPowerSupplyCurrentPowerSupplyCurrentTotalPowerSupplyCurrent
4.0
ICCDDynamicICC0.25
mAmA/MHzMaxMax
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54FCT373ACElectricalCharacteristics
Symbol
Parameter
54FCT
TA=−55˚Cto+125˚CVCC=4.5Vto5.5V
CL=50pF
Min
tPLHtPHLtPLHtPHLtPZHtPZLtPHZtPLZOutputDisableTimePropagationDelayDntoOnPropagationDelayLEtoOnOutputEnableTime
1.51.52.02.01.51.51.51.5
Max8.58.515.015.013.513.512.512.5
nsnsnsnsUnits
Fig.No.
Figure4Figure4Figure6Figure6ACOperatingRequirements
Symbol
Parameter
54FCT
TA=−55˚Cto+125˚CVCC=4.5Vto5.5V
CL=50pF
Min
ts(H)ts(L)th(H)th(L)tw(H)
SetupTime,HIGHorLOWDntoLEHoldTime,HIGHorLOWDntoLEPulseWidth,LEHIGH
2.02.03.03.06.0
nsns
Max
nsUnits
Fig.No.
Figure7Figure7Figure5Capacitance
SymbolCINCOUT(Note3)
ParameterInputCapacitanceOutputCapacitance
Max1012
UnitspFpF
Conditions(TA=25˚C)VCC=0VVCC=5.0V
Note3:COUTismeasuredatfrequencyf=1MHz,perMIL-STD-883B,Method3012.
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54FCT373ACLoading
DS100957-4
*Includesjigandprobecapacitance
FIGURE1.StandardACTestLoad
DS100957-5
FIGURE5.PropagationDelay,PulseWidthWaveforms
DS100957-6
FIGURE2.TestInputSignalLevels
Amplitude3.0V
Rep.Rate1MHz
tw500ns
tr2.5ns
tf2.5ns
FIGURE3.TestInputSignalRequirements
DS100957-7
FIGURE6.TRI-STATEOutputHIGHandLOWEnableandDisableTimes
DS100957-9
FIGURE7.SetupTime,HoldTimeandRecoveryTimeWaveforms
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54FCT373PhysicalDimensions
inches(millimeters)unlessotherwisenoted
20-TerminalCeramicChipCarrier(L)
NSPackageNumberE20A
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54FCT373PhysicalDimensions
inches(millimeters)unlessotherwisenoted(Continued)
20-LeadCeramicDual-In-Line(D)
NSPackageNumberJ20A
20-LeadCeramicFlatpak(F)NSPackageNumberW20A
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54FCT373OctalTransparentLatchwithTRI-STATEOutputsNotes
LIFESUPPORTPOLICY
NATIONAL’SPRODUCTSARENOTAUTHORIZEDFORUSEASCRITICALCOMPONENTSINLIFESUPPORTDEVICESORSYSTEMSWITHOUTTHEEXPRESSWRITTENAPPROVALOFTHEPRESIDENTANDGENERALCOUNSELOFNATIONALSEMICONDUCTORCORPORATION.Asusedherein:1.Lifesupportdevicesorsystemsaredevicesorsystemswhich,(a)areintendedforsurgicalimplantintothebody,or(b)supportorsustainlife,andwhosefailuretoperformwhenproperlyusedinaccordancewithinstructionsforuseprovidedinthelabeling,canbereasonablyexpectedtoresultinasignificantinjurytotheuser.
NationalSemiconductorCorporationAmericas
Tel:1-800-272-9959Fax:1-800-737-7018Email:support@nsc.com
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NationalSemiconductorEurope
Fax:+49(0)180-5308586Email:europe.support@nsc.com
DeutschTel:+49(0)180-5308585EnglishTel:+49(0)180-5327832FrançaisTel:+49(0)180-5329358ItalianoTel:+49(0)180-5341680
2.Acriticalcomponentisanycomponentofalifesupportdeviceorsystemwhosefailuretoperformcanbereasonablyexpectedtocausethefailureofthelifesupportdeviceorsystem,ortoaffectitssafetyoreffectiveness.
NationalSemiconductorAsiaPacificCustomerResponseGroupTel:65-2544466Fax:65-2504466
Email:sea.support@nsc.com
NationalSemiconductorJapanLtd.
Tel:81-3-5639-7560Fax:81-3-5639-7507
Nationaldoesnotassumeanyresponsibilityforuseofanycircuitrydescribed,nocircuitpatentlicensesareimpliedandNationalreservestherightatanytimewithoutnoticetochangesaidcircuitryandspecifications.
