Understanding and Interpreting Standard-Logic Data Sheets ...

1 1 SZZA036C December2002 RevisedJune2016 SubmitDocumentationFeedbackCopyright 2002 2016,TexasInstrumentsIncorporatedUnderst andingand InterpretingStandard-LogicDataSheetsAppl icationReportSZZA036C December2002 RevisedJune2016 Understandingand ,JoseM. Soltero,ShreyasRaoABSTRACTT exasInstruments(TI) standard-logicproductdatasheetsincludede scriptionsof functionalityandelectricalspecifications for the ,numericallimits,and testconditionsthat maybe foreignto the properunderstandingand interpretationof the direct,andsometimesimplied,meaningsof thesespecificationsare essentialto detail,howitaffectsthe device,and howit impactsthe enablecomponentand system-designengineersto derivethe maximumbenefitfromTI the TI Configurationand TI ConfigurationAnd December2002 RevisedJune2016 SubmitDocumentationFeedbackCopyright 2002 2016,TexasInstrumentsIncorporatedUnderst andingand applicationreportis organizedinto five the TI LogicDataSheet. Overalllayoutand componentpartsof a TI LogicDataSheet.

2 JEDEC definition,the TI definition,an explanation,and,wherepossible,helpfulhin tsare presentedfor eachspecificationtermcommonlyfoundin TI Informationin TI logicdatasheetsfor determiningthe interfacecompatibilitybetweendifferentlo gicfamiliesis End matter,includingtheConclusion,Acknowledg ments, applicationreportis a synopsisof the informationavailablefroma typicalTI datasheetwith thepurposeof assistingcomponentand system-designengineersin selectingTexasInstruments(TI) briefdescriptionof terms,definitions,and testingprocedurescurrentlyusedfor commercial,automotiveand ,terms,anddefinitionsgenerallyare in accordancewith thosecurrentlyagreeduponby the JEDECS olidStateTechnologyAssociationfor use in the USAand by the InternationalElectrotechnicalCommission( IEC) the TI LogicDataSheet3 SZZA036C December2002 RevisedJune2016 SubmitDocumentationFeedbackCopyright 2002 2016,TexasInstrumentsIncorporatedUnderst andingand InterpretingStandard-LogicDataSheets3 Top-LevelLookat the TI LogicDataSheetThe TI logicdatasheetpresentspertinenttechnical informationfor a particulardeviceand is applicationreportdissectsa typicalTI logicdatasheetand describesthe organizationof all ,thereare ten sectionsin TI-logicdatasheets:1.

3 FrontPage(a) Features(b) Applications(c) Description(d) DeviceInformationTable(e) Front-PageGraphic(s)2. Tableof Contents3. RevisionHistory4. Pin Configurationand Functions5. Specifications(a) AbsoluteMaximumRatings(b) ESDR atings(c) RecommendedOperatingConditions(d) ThermalInformation(e) ElectricalCharacteristics(f) TimingRequirements(g) SwitchingCharacteristics(h) TypicalCharacteristics6. ParameterMeasurementInformation7. DetailedDescription(a) Overview(b) FunctionalBlockDiagram(c) FeatureDescription(d) DeviceFunctionalModes8. Applicationand Implementation(a) ApplicationInformation(b) TypicalApplication(c) DesignRequirements(d) DetailedDesignProcedure(e) ApplicationCurves9. PowerSupplyRecommendations10. Layout(a) LayoutGuidelines(b) LayoutExample11. Deviceand DocumentationSupport12. Mechanical,Packaging,and OrderingInformationTop-LevelLookat the TI December2002 RevisedJune2016 SubmitDocumentationFeedbackCopyright 2002 2016,TexasInstrumentsIncorporatedUnderst andingand first pageof a datasheetcontainsall of the generalinformationabouta device(seeFigure1).

4 Thisinformationincludes:1. Title,literaturenumber,and datesof originationand revision,as ,the top navigationcontainshyperlinksleadingdirec tlyto ProductFolder,Sample& Buy,TechnicalDocuments(relatedtothe device),Tools& Software,and Support& Exampleof DeviceSummary2. TheFeaturessectionidentifiesthe mainfeaturesand benefitsof the sectionincludesfeaturesin a showsan exampleof the FeatureBullets3. TheApplicationssectionfor the deviceidentifiesthe applicationscenariosfor the exampleof TypicalApplications4 Revision HistoryChanges from Revision X (March 2014 to Revision YDevice Information(1)DEVICE NAMEPACKAGEBODY SIZESOT-23 (5) (5) (6) (6) (1) For all available packages, see the orderable addendum atthe end of the (4) the TI LogicDataSheet5 SZZA036C December2002 RevisedJune2016 SubmitDocumentationFeedbackCopyright 2002 2016,TexasInstrumentsIncorporatedUnderst andingand InterpretingStandard-LogicDataSheets4. TheDescriptionsectionprovidesa briefdescriptionof the deviceand its functionalityFigure4.)

5 BriefDescriptionof Device5. Figure5 showsa deviceinformationdefinesthe nominalsize of the devicein eachof the DeviceInformation6. Product-developmentstagenoteat the bottomof the datasheet7. Tableof contentsto list the contentsand the link to the Revisionhistoryfor the devicementioningthe changesto the datasheetwith the RevisionHistoryTop-LevelLookat the TI December2002 RevisedJune2016 SubmitDocumentationFeedbackCopyright 2002 2016,TexasInstrumentsIncorporatedUnderst andingand Configurationand FunctionsFigure7 showsall the packageoptionsfor the showsthe functionsof eachpin sortedbythe packagelist and theircorrespondingpin Pin Configurationand FunctionsFigure8. Pin (Figure9) specifiesthe stresslevelsthat,if exceeded,may causepermanentdamageto the ,theseare stressratingsonly,and functionaloperationof thedeviceat theseor any otherconditionsbeyondthoseindicatedunder RecommendedOperatingConditionsis not ,exposureto absolute-maximum-ratedconditionsfor Absolute Maximum Ratingsover operating free-air temperature range (unless otherwise noted)(1)VCCS upply voltage rangeVIInput voltage range(2)VOVoltage range applied to any output in the high-impedance or power-off state(2)VOVoltage range applied to any output in the high or low state(2)(3)IIKI nput clamp currentVI< 0 IOKO utput clamp currentVO< 0 IOContinuous output currentContinuous current through VCCor GNDTstgStorage temperature rangeMINMAX UNIT V V V VCC+ V 50 mA 50 mA 50 mA 100 mA 65150 C(1) Stresses beyond those listed underAbsolute Maximum Ratingsmay cause permanent damage to the device.

6 These are stress ratingsonly, and functional operation of the device at these or any other conditions beyond those indicated underRecommended OperatingConditionsis not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.(2) The input negative-voltage and output voltage ratings may be exceeded if the input and output clamp-current ratings are observed.(3) The value of VCCis provided in theRecommended operating the TI LogicDataSheet7 SZZA036C December2002 RevisedJune2016 SubmitDocumentationFeedbackCopyright 2002 2016,TexasInstrumentsIncorporatedUnderst andingand InterpretingStandard-LogicDataSheetsAs Figure9 indicates,thereare two absolutemaximumsthat may be inputand outputvoltageratings,VIand VO, may be exceededif the inputand outputmaximumclamp-currentratings,IIKand IOK, are Exampleof AbsoluteMaximumRatingsSectionHelpfulHint :All currentsare definedwith respectto conventionalcurrentflow into the respectiveterminalof meansthat any currentthat flowsout of the respectiveterminalis consideredto bea limitsare givenaccordingto the absolute-magnitudeconvention,with a few thisconvention,maximumrefersto the greatermagnitudelimit of a rangeof like-signedvalues;if the rangeincludesbothpositiveand negativevalues,bothlimit valuesare the smallermagnitudelimit of a rangeof like-signedvalues.

7 If the rangeincludesbothpositiveand negativevalues,thenthe minimumis mostcommonexceptionsto the absolutemagnitudeconventionare temperatureand theselevels,zerodoesnot representthe least-possiblequantity,sothe algebraicconventionis this case,maximumrefersto the ESDR atingssectionof the datasheetspecifiesthe ElectrostaticDischargeratingsfor the devicetestedas per JEDEC(JointElectronDeviceEngineeringCoun cil) ,HBM(HumanBodyModel)and CDM(ChargedDeviceModel)specis tabulatedas per (MM)is (ESD)ElectrostaticdischargeHumanbodymode l(HBM),per ANSI/ESDA/JEDECJS-001(1)2000 VChargeddevicemodel(CDM),per JEDEC specificationJESD22-C101(2)1000(1)JEDEC documentJEP155statesthat 500-VHBM allowssafe manufacturingwith a standardESDcontrolprocess.(2)JEDEC documentJEP157statesthat 250-VCDM allowssafe manufacturingwith a Exampleof ESDR atingsSectionTop-LevelLookat the TI December2002 RevisedJune2016 SubmitDocumentationFeedbackCopyright 2002 2016,TexasInstrumentsIncorporatedUnderst andingand the datasheetsets the conditionsfor whichTexasInstrumentsspecifiesdeviceoper ation(seeFigure11).

8 Theseare the conditionsthat the applicationcircuitshouldprovideto the devicein orderfor it to functionas limitsfor itemsthat appearinthis sectionare usedas test conditionsfor the limitsthat appearin theElectricalCharacteristics,TimingRequi rements,SwitchingCharacteristics, (seeNote4) t/ vInputtransitionrise or fall rateOutputsenabled1010ns/V t/ VCCP ower-upramprate200200 s/VTAO peratingfree-airtemperature-55125-4085 CNOTE:All unusedcontrolinputsof the devicemustbe held at VCCor GNDto the TI applicationreport,Implicationsof Slowor FloatingCMOSI nputs, (overrecommendedfree-airtemperaturerange )table,also knownin theindustryas the DC table,providesthe specifiedelectricalcharacteristiclimitso f the devicewhentestedunderthe conditionsin theRecommendedOperatingConditionstable,a s givenspecificallyfor eachparameter(seeFigure12).HelpfulHint:A lthoughsomeparameters,suchas Ciand Cio, can be testedwith an ac signal,sometimesthe electricalcharacteristicstableis calledthe DC the TI LogicDataSheet9 SZZA036C December2002 RevisedJune2016 SubmitDocumentationFeedbackCopyright 2002 2016,TexasInstrumentsIncorporatedUnderst andingand InterpretingStandard-LogicDataSheetsElec tricalCharacteristics(OverRecommendedOpe ratingFree-airTemperatureRange(unlessoth erwisenoted))PARAMETERTESTCONDITIONSSN54 LVTH16646SN74 LVTH16646 UNITMINTYP(4)MAXMINTYP(4)MAXVIKVCC= V,II= -18 mA V to V,IOH= -100 V,IOH= -8 3 VIOH= -24 mA2 IOH= -32 mA2 VOLVCC= VIOL= 100 24 3 VIOL= 16 32 48 64 V,VI= VCCor GND 1 1 AVCC= 0 or V,VI= V1010A or B ports(5)VCC= VVI= V2020VI= VCC11VI= 0 5 5 IoffVCC= 0 V,VIor VO= 0 to V 100 AII(hold)A or B portsVCC= 3 VVI= V7575 AVI= 2 V 75 75 VCC= V (6)

9 ,VI= 0 to V 500 IOZPUVCC= 0 to V, VO= V to 3 V,OE = don't care 100* 100 AIOZPDVCC= V to 0, VO= V to 3 V,OE = don't care 100* 100 AICCVCC= V, IO= 0,VI= VCCor ICC(7)VCC= 3 V to V, One inputat VCC- V,Otherinputsat VCCor 3 V or 044pFCioVO= 3 V or 01010pF(3)On productscompliantto MIL-PRF-38535,this parameteris not productiontested.(4)All typicalvaluesare at VCC= V, TA= 25 C.(5)Unusedpins at VCCor GND(6)This is the is the minimumoverdrivecurrentrequiredto switchthe inputfromone stateto another.(7)This is the increasein supplycurrentfor eachinputthat is at the specifiedTTL voltagelevel,ratherthanVCCor the datasheetprovidesinformationaboutthe parametersneededfor truelive , IOZPU, IOZPD, and BIASVCCfor a typicallive-insertionsectionis shownin the TI December2002 RevisedJune2016 SubmitDocumentationFeedbackCopyright 2002 2016,TexasInstrumentsIncorporatedUnderst andingand InterpretingStandard-LogicDataSheetsLive -insertionSpecificationsfor B port OverRecommendedOperatingFree-airTemperat ureRangePARAMETERTESTCONDITIONSMINMAXUNI TIoffVCC= 0,BIASVCC= 0,VIor VO= 0 to V10 AIOZPUVCC= 0 to V,BIASVCC= 0,VO= V to V, OE = 0 30 AIOZPDVCC= V to 0,BIASVCC= 0,VO= V to V, OE = 0 30 AICC(BIASVCC)VCC= 0 to to ,VO(B port)= 0 to V5mAVCC= to AVOVCC= 0,BIASVCC= V,IO= 0,BIASVCC= to ,VO(B port)= V-1 AFigure13.

10 The datasheetis similarto theRecommendedOperatingConditionssection (seeFigure14). Theseare timingsthat the applicationcircuitshouldprovideto the devicefor it tofunctionas sectionaddressesthe timingrelationshipsbetweentransitionsof one or moreinputsignalsthat are necessaryto ensuredevicefunctionalityand appliesonly to sequential-logicdevices(for example,flip-flops,latches,and registers).TimingRequirements(OverRecomm endedOperatingFree-airTemperatureRange(u nlessotherwisenoted))(seeFigure2)SN54 LVTH16646SN74 LVTH16646 UNITVCC= V VVCC= VVCC= V VVCC= VMINMAXMINMAXMINMAXMINMAX fclockClockfrequency150150150150 MHztwPulseduration,CLKhigh or ,A or B beforeCLKAB or CLKBA ,A or B afterCLKAB or CLKBA the datasheet,also knownin the industryas the AC table,includesthe parametersthat specifyhow fast the outputswill respondto signalchangesat the inputsunderspecifiedconditionsof supplyvoltage,temperature,and load (seeFigure15).HelpfulHint:TheSwitchingCh aracteristicstableis sometimescalledthe AC section,and shouldnot be confusedwiththe AC small-signalperformancebecauseswitchingc haracteristicsdescribethe large-signaltransientresponseof the the TI LogicDataSheet11 SZZA036C December2002 RevisedJune2016 SubmitDocumentationFeedbackCopyright 2002 2016,TexasInstrumentsIncorporatedUnderst andingand InterpretingStandard-LogicDataSheetsSwit chingCharacteristics(OverrecommendedOper atingFree-airTemperatureRange,CL= 50 pF (unlessotherwisenoted))(seeFigure2)PARAM ETERFROM(INPUT)TO(OUTPUT)SN54 LVTH16646SN74 LVTH16646 UNITVCC= V VVCC= VVCC= V VVCC= VMINMAXMINMAXMINTYP(8)MAXMINMAX fmax150150150150 MHztPLHCLKBAorCLKABA or or BB or SAB(9)A or or or or or (8)All typicalvaluesare at VCC= V, TA= 25 C.