Product Sample & Technical Tools & Support & Folder Buy Documents Software Community SN54AHC125,SN74AHC125 SCLS256L–DECEMBER1995–REVISEDNOVEMBER2016 SNx4AHC125 Quadruple Bus Buffer Gates With 3-State Outputs 1 Features 3 Description • OperatingRange:2Vto5.5V The SNx4AHC125 devices are quadruple bus buffer 1 gates featuring independent line drivers with 3-state • Latch-UpPerformanceExceeds250mAPer outputs. Each output is disabled when the associated JESD17 output-enable(OE)inputishigh.WhenOEislow,the • FourIndividualOutputEnablePins respective gate passes the data from the A input to • AllInputsHaveSchmitt-TriggerAction itsYoutput. To ensure the high-impedance state during power up 2 Applications or power down, OE must be tied to V through a CC pullup resistor; the minimum value of the resistor is • FlowMeters determined by the current-sinking capability of the • ProgrammableLogicControllers driver. • PowerOverEthernet(PoE) • MotorDrivesandControls DeviceInformation(1) • ElectronicPoint-of-Sale PARTNUMBER PACKAGE(PINS) BODYSIZE(NOM) SNx4AHC125FK LCCC(20) 8.89mm8.89mm SNx4AHC125DB SSOP(14) 6.20mm5.30mm SNx4AHC125D SOIC(14) 8.65mm×3.91mm SNx4AHC125NS SO(14) 10.30mm×5.30mm SNx4AHC125W CFP(14) 9.21mm×5.97mm SNx4AHC125DGV TVSOP(14) 3.60mm×4.40mm SNx4AHC125PW TSSOP(14) 5.00mm×4.40mm SNx4AHC125N PDIP(14) 19.30mm×6.35mm SNx4AHC125RGY VQFN(14) 3.50mm×3.50mm SNx4AHC125J CDIP(14) 19.56mm×6.67mm (1) For all available packages, see the orderable addendum at theendofthedatasheet. LogicDiagram(PositiveLogic) 1 10 1OE 3OE 2 3 9 8 1A 1Y 3A 3Y 4 13 2OE 4OE 5 6 12 11 2A 2Y 4A 4Y PinnumbersshownarefortheD,DB,DGV,J,N,NS,PW,RGY,andWpackages. 1 An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications, intellectualpropertymattersandotherimportantdisclaimers.PRODUCTIONDATA.

SN54AHC125,SN74AHC125 SCLS256L–DECEMBER1995–REVISEDNOVEMBER2016 www.ti.com Table of Contents 1 Features.................................................................. 1 8.2 FunctionalBlockDiagram.......................................12 2 Applications........................................................... 1 8.3 FeatureDescription.................................................12 3 Description............................................................. 1 8.4 DeviceFunctionalModes........................................12 4 RevisionHistory..................................................... 2 9 ApplicationandImplementation........................ 13 9.1 ApplicationInformation............................................13 5 PinConfigurationandFunctions......................... 3 9.2 TypicalApplication..................................................13 6 Specifications......................................................... 5 10 PowerSupplyRecommendations..................... 15 6.1 AbsoluteMaximumRatings......................................5 11 Layout................................................................... 15 6.2 ESDRatings..............................................................5 6.3 RecommendedOperatingConditions.......................5 11.1 LayoutGuidelines.................................................15 6.4 ThermalInformation..................................................6 11.2 LayoutExample....................................................15 6.5 ElectricalCharacteristics...........................................6 12 DeviceandDocumentationSupport................. 16 6.6 SwitchingCharacteristics:V =3.3V±0.3V.........8 12.1 DocumentationSupport........................................16 CC 6.7 SwitchingCharacteristics:V =5V±0.5V............9 12.2 RelatedLinks........................................................16 CC 6.8 NoiseCharacteristics..............................................10 12.3 ReceivingNotificationofDocumentationUpdates16 6.9 OperatingCharacteristics........................................10 12.4 CommunityResources..........................................16 6.10 TypicalCharacteristics..........................................10 12.5 Trademarks...........................................................16 7 ParameterMeasurementInformation................11 12.6 ElectrostaticDischargeCaution............................16 12.7 Glossary................................................................16 8 DetailedDescription............................................ 12 13 Mechanical,Packaging,andOrderable 8.1 Overview.................................................................12 Information........................................................... 16 4 Revision History NOTE:Pagenumbersforpreviousrevisionsmaydifferfrompagenumbersinthecurrentversion. ChangesfromRevisionK(June2013)toRevisionL Page • AddedESDRatingstable,FeatureDescriptionsection,DeviceFunctionalModes,ApplicationandImplementation section,PowerSupplyRecommendationssection,Layoutsection,DeviceandDocumentationSupportsection,and Mechanical,Packaging,andOrderableInformationsection.................................................................................................. 1 • DeletedOrderingInformationtable;seePackageOptionAddendumattheendofthedatasheet...................................... 1 • ChangedPackagethermalimpedance,R ,valueinThermalInformationtableFrom:86°C/WTo:92.6°C/W(D), θJA From:96°C/WTo:107.3°C/W(DB),From:127°C/WTo:134.6°C/W(DGV),From:80°C/WTo:56.3°C/W(N),From: 76°C/WTo:89.9°C/W(NS),andFrom:113°C/WTo:121.5°C/W(PW)................................................................................ 6 ChangesfromRevisionJ(December1995)toRevisionK Page • ChangeddocumentformatfromQuicksilvertoDocZone...................................................................................................... 1 • Extendedoperatingtemperaturerangeto125°C................................................................................................................... 5 2 SubmitDocumentationFeedback Copyright©1995–2016,TexasInstrumentsIncorporated ProductFolderLinks:SN54AHC125 SN74AHC125

SN54AHC125,SN74AHC125 www.ti.com SCLS256L–DECEMBER1995–REVISEDNOVEMBER2016 5 Pin Configuration and Functions D,DB,DGV,N,NS,J,W,orPWPackage RGYPackage 14-PinSOIC,SSOP,TVSOP,PDIP,SO,CDIP,CFP,orTSSOP 14-PinVQFN TopView TopView E C O C 1 V 1OE 1 14 VCC 1 14 1A 2 13 4OE 1A 2 13 4OE 1Y 3 12 4A 1Y 3 12 4A 2OE 4 11 4Y 2OE 4 11 4Y 2A 5 10 3OE 2Y 6 9 3A 2A 5 10 3OE 7 8 2Y 6 9 3A D Y N 3 GND 7 8 3Y G Not to scale FKPackage 20-PinLCCC TopView E C E A O C C O 1 1 N V 4 3 2 1 0 9 2 1 1Y 4 18 4A NC 5 17 NC 2OE 6 16 4Y NC 7 15 NC 2A 8 14 3OE 0 1 2 3 9 1 1 1 1 Not to scale Y D C Y A 2 N N 3 3 G Copyright©1995–2016,TexasInstrumentsIncorporated SubmitDocumentationFeedback 3 ProductFolderLinks:SN54AHC125 SN74AHC125

SN54AHC125,SN74AHC125 SCLS256L–DECEMBER1995–REVISEDNOVEMBER2016 www.ti.com PinFunctions PIN SOIC,SSOP,TVSOP,PDIP, I/O DESCRIPTION NAME LCCC SO,CDIP,CFP,TSSOP,VQFN 1OE 1 2 I Outputenableforgate1 1A 2 3 I Gate1input 1Y 3 4 O Gate1output 2OE 4 6 I Outputenableforgate2 2A 5 8 I Gate2input 2Y 6 9 O Gate2output 3OE 10 14 I Outputenableforgate3 3A 9 13 I Gate3input 3Y 8 12 O Gate3output 4OE 13 19 I Outputenableforgate4 4A 12 18 I Gate4input 4Y 11 16 O Gate4output GND 7 10 — Groundpin 1,5,7, NC — — Nointernalconnection 11,15,17 V 14 20 — Powerpin CC 4 SubmitDocumentationFeedback Copyright©1995–2016,TexasInstrumentsIncorporated ProductFolderLinks:SN54AHC125 SN74AHC125

SN54AHC125,SN74AHC125 www.ti.com SCLS256L–DECEMBER1995–REVISEDNOVEMBER2016 6 Specifications 6.1 Absolute Maximum Ratings overoperatingfree-airtemperaturerange(unlessotherwisenoted)(1) MIN MAX UNIT Supplyvoltage –0.5 7 V Inputvoltage(2) –0.5 7 V Outputvoltage(2) –0.5 V +0.5 V CC Inputclampcurrent V <0 –20 mA I Outputclampcurrent V <0orV >V ±20 mA O O CC Continuousoutputcurrent V =0toV ±25 mA O CC ContinuouscurrentthroughV orGND ±50 mA CC Virtualoperatingjunctiontemperature,T 150 °C J Storagetemperature,T –65 150 °C stg (1) StressesbeyondthoselistedunderAbsoluteMaximumRatingsmaycausepermanentdamagetothedevice.Thesearestressratings only,whichdonotimplyfunctionaloperationofthedeviceattheseoranyotherconditionsbeyondthoseindicatedunderRecommended OperatingConditions.Exposuretoabsolute-maximum-ratedconditionsforextendedperiodsmayaffectdevicereliability. (2) Theinputandoutputvoltageratingsmaybeexceedediftheinputandoutputcurrentratingsareobserved. 6.2 ESD Ratings VALUE UNIT Human-bodymodel(HBM),perANSI/ESDA/JEDECJS-001(1) ±1500 V Electrostaticdischarge V (ESD) Charged-devicemodel(CDM),perJEDECspecificationJESD22-C101(2) ±1000 (1) JEDECdocumentJEP155statesthat500-VHBMallowssafemanufacturingwithastandardESDcontrolprocess. (2) JEDECdocumentJEP157statesthat250-VCDMallowssafemanufacturingwithastandardESDcontrolprocess. 6.3 Recommended Operating Conditions overoperatingfree-airtemperaturerange(unlessotherwisenoted) MIN MAX UNIT V Supplyvoltage 2 5.5 V CC V =2V 1.5 CC V High-levelinputvoltage V =3V 2.1 V IH CC V =5.5V 3.85 CC V =2V 0.5 CC V Low-levelInputvoltage V =3V 0.9 V IL CC V =5.5V 1.65 CC V Inputvoltage 0 5.5 V I V Outputvoltage 0 V V O CC V =2V –50 µA CC I High-leveloutputcurrent V =3.3V±0.3V –4 OH CC mA V =5V±0.5V –8 CC V =2V 50 µA CC I Low-leveloutputcurrent V =3.3V±0.3V 4 OL CC mA V =5V±0.5V 8 CC V =3.3V±0.3V 100 CC Δt/Δv InputTransitionriseorfallrate ns/V V =5V±0.5V 20 CC T Operatingfree-airtemperature –40 125 °C A Copyright©1995–2016,TexasInstrumentsIncorporated SubmitDocumentationFeedback 5 ProductFolderLinks:SN54AHC125 SN74AHC125

SN54AHC125,SN74AHC125 SCLS256L–DECEMBER1995–REVISEDNOVEMBER2016 www.ti.com 6.4 Thermal Information SNx4AHC125 THERMALMETRIC(1) D(SOIC) DB(SSOP) NS(SO) DGV(TVSOP) PW(TSSOP) N(PDIP) RGY(VQFN) UNIT 14PINS 14PINS 14PINS 14PINS 14PINS 14PINS 14PINS Junction-to- RθJA ambientthermal 92.6 107.3 89.9 134.6 121.5 56.3 55.1 °C/W resistance Junction-to-case RθJC(top) (top)thermal 52.7 59.3 47.7 53.9 50.2 43.9 52.3 °C/W resistance Junction-to- RθJB boardthermal 46.8 54.7 48.6 63.8 63.2 36.1 30.9 °C/W resistance Junction-to-top ψJT characterization 19.7 24 17.5 6.3 6.1 29.2 2.4 °C/W parameter Junction-to- board ψJB characterization 46.6 54.1 48.3 63.2 62.7 36 31 °C/W parameter Junction-to-case RθJC(bot) (bottom)thermal — — — — — — 12.7 °C/W resistance (1) Formoreinformationabouttraditionalandnewthermalmetrics,seetheSemiconductorandICPackageThermalMetricsapplication report. 6.5 Electrical Characteristics overrecommendedoperatingfree-airtemperaturerange(unlessotherwisenoted) PARAMETER TESTCONDITIONS MIN TYP MAX UNIT TA=25°C 1.9 2 TA=–55°Cto125°C(SN54AHC125) 1.9 VCC=2V TA=–40°Cto85°C(SN74AHC125) 1.9 TA=–40°Cto125°C 1.9 (recommendedSN74AHC125) TA=25°C 2.9 3 TA=–55°Cto125°C(SN54AHC125) 2.9 IOH=–50µA VCC=3V TA=–40°Cto85°C(SN74AHC125) 2.9 TA=–40°Cto125°C 2.9 (recommendedSN74AHC125) TA=25°C 4.4 4.5 TA=–55°Cto125°C(SN54AHC125) 4.4 VOH VCC=4.5V TA=–40°Cto85°C(SN74AHC125) 4.4 V TA=–40°Cto125°C 4.4 (recommendedSN74AHC125) TA=25°C 2.58 TA=–55°Cto125°C(SN54AHC125) 2.48 IOH=–4mAandVCC=3V TA=–40°Cto85°C(SN74AHC125) 2.48 TA=–40°Cto125°C 2.48 (recommendedSN74AHC125) TA=25°C 3.94 TA=–55°Cto125°C(SN54AHC125) 3.8 IOH=–8mAandVCC=4.5V TA=–40°Cto85°C(SN74AHC125) 3.8 TA=–40°Cto125°C 3.8 (recommendedSN74AHC125) 6 SubmitDocumentationFeedback Copyright©1995–2016,TexasInstrumentsIncorporated ProductFolderLinks:SN54AHC125 SN74AHC125

SN54AHC125,SN74AHC125 www.ti.com SCLS256L–DECEMBER1995–REVISEDNOVEMBER2016 Electrical Characteristics (continued) overrecommendedoperatingfree-airtemperaturerange(unlessotherwisenoted) PARAMETER TESTCONDITIONS MIN TYP MAX UNIT TA=25°C 0.1 TA=–55°Cto125°C(SN54AHC125) 0.1 VCC=2V TA=–40°Cto85°C(SN74AHC125) 0.1 TA=–40°Cto125°C 0.1 (recommendedSN74AHC125) TA=25°C 0.1 TA=–55°Cto125°C(SN54AHC125) 0.1 IOL=50µA VCC=3V TA=–40°Cto85°C(SN74AHC125) 0.1 TA=–40°Cto125°C 0.1 (recommendedSN74AHC125) TA=25°C 0.1 TA=–55°Cto125°C(SN54AHC125) 0.1 VOL VCC=4.5V TA=–40°Cto85°C(SN74AHC125) 0.1 V TA=–40°Cto125°C 0.1 (recommendedSN74AHC125) TA=25°C 0.36 TA=–55°Cto125°C(SN54AHC125) 0.5 IOH=4mAandVCC=3V TA=–40°Cto85°C(SN74AHC125) 0.44 TA=–40°Cto125°C 0.5 (recommendedSN74AHC125) TA=25°C 0.36 TA=–55°Cto125°C(SN54AHC125) 0.5 IOH=8mAandVCC=4.5V TA=–40°Cto85°C(SN74AHC125) 0.44 TA=–40°Cto125°C 0.5 (recommendedSN74AHC125) TA=25°C ±0.1 TA=–55°Cto125°C(SN54AHC125) ±1(1) II VI=5.5VorGNDandVCC=0Vto5.5V TA=–40°Cto85°C(SN74AHC125) ±1 µA TA=–40°Cto125°C ±1 (recommendedSN74AHC125) TA=25°C ±0.25 TA=–55°Cto125°C(SN54AHC125) ±2.5 IOZ VO=VCCorGNDandVCC=5.5V TA=–40°Cto85°C(SN74AHC125) ±2.5 µA TA=–40°Cto125°C ±2.5 (recommendedSN74AHC125) TA=25°C 4 TA=–55°Cto125°C(SN54AHC125) 40 ICC VI=VCCorGND,IO=0,andVCC=5.5V TA=–40°Cto85°C(SN74AHC125) 40 µA TA=–40°Cto125°C 40 (recommendedSN74AHC125) TA=25°C 4 10 Ci VI=VCCorGNDandVCC=5V pF TA=–40°Cto85°C(SN74AHC125) 10 (1) OnproductscomplianttoMIL-PRF-38535,thisparameterisnotproductiontestedatV =0V. CC Copyright©1995–2016,TexasInstrumentsIncorporated SubmitDocumentationFeedback 7 ProductFolderLinks:SN54AHC125 SN74AHC125

SN54AHC125,SN74AHC125 SCLS256L–DECEMBER1995–REVISEDNOVEMBER2016 www.ti.com 6.6 Switching Characteristics: V = 3.3 V ±0.3 V CC overrecommendedoperatingfree-airtemperaturerangeandV =3.3V±0.3V(unlessotherwisenoted;seeFigure2) CC FROM TO PARAMETER TESTCONDITIONS MIN TYP MAX UNIT (INPUT) (OUTPUT) TA=25°C 5.6(1) 8(1) TA=–55°Cto125°C 1(1) 9.5(1) (SN54AHC125) tPHL,tPLH A Y CL=15pF ns TA=–40°Cto85°C(SN74AHC125) 1 9.5 TA=–40°Cto125°C 1 9.5 (recommendedSN74AHC125) TA=25°C 5.4(1) 8(1) TA=–55°Cto125°C 1(1) 9.5(1) (SN54AHC125) tPZL,tPZH OE Y CL=15pF ns TA=–40°Cto85°C(SN74AHC125) 9.5 TA=–40°Cto125°C 9.5 (recommendedSN74AHC125) TA=25°C 7.0(1) 9.7(1) TA=–55°Cto125°C 1(1) 11.5(1) (SN54AHC125) tPLZ,tPHZ OE Y CL=15pF TA=–40°Cto85°C(SN74AHC125) 1(1) 11.5(1) ns TA=–40°Cto125°C 1(1) 11.5(1) (recommendedSN74AHC125) TA=25°C 8.1 11.5 TA=–55°Cto125°C 1 13 (SN54AHC125) tPHL,tPLH A Y CL=50pF ns TA=–40°Cto85°C(SN74AHC125) 1 13 TA=–40°Cto125°C 1 13 (recommendedSN74AHC125) TA=25°C 7.9 11.5 TA=–55°Cto125°C 1 13 (SN54AHC125) tPZL,tPZH OE Y CL=50pF ns TA=–40°Cto85°C(SN74AHC125) 1 13 TA=–40°Cto125°C 1 13 (recommendedSN74AHC125) TA=25°C 9.5 13.2 TA=–55°Cto125°C 1 15 (SN54AHC125) tPLZ,tPHZ OE Y CL=50pF ns TA=–40°Cto85°C(SN74AHC125) 1 15 TA=–40°Cto125°C 1 15 (recommendedSN74AHC125) TA=25°C 1.5(2) tsk(o) OE Y CL=50pF ns TA=–40°Cto85°C(SN74AHC125) 1.5 (1) OnproductscomplianttoMIL-PRF-38535,thisparameterisnotproductiontested. (2) OnproductscomplianttoMIL-PRF-38535,thisparameterdoesnotapply. 8 SubmitDocumentationFeedback Copyright©1995–2016,TexasInstrumentsIncorporated ProductFolderLinks:SN54AHC125 SN74AHC125

SN54AHC125,SN74AHC125 www.ti.com SCLS256L–DECEMBER1995–REVISEDNOVEMBER2016 6.7 Switching Characteristics: V = 5 V ±0.5 V CC overrecommendedoperatingfree-airtemperaturerangeandV =5V±0.5V(unlessotherwisenoted;seeFigure2) CC FROM TO PARAMETER TESTCONDITIONS MIN TYP MAX UNIT (INPUT) (OUTPUT) TA=25°C 3.8(1) 5.5(1) TA=–55°Cto125°C 1(1) 6.5(1) (SN54AHC125) tPLH,tPHL A Y CL=15pF TA=–40°Cto85°C 1 6.5 ns (SN74AHC125) TA=–40°Cto125°C 1 6.5 (recommendedSN74AHC125) TA=25°C 3.6(1) 5.1(1) TA=–55°Cto125°C 1(1) 6(1) (SN54AHC125) tPZH,tPZL OE Y CL=15pF TA=–40°Cto85°C 1 6 ns (SN74AHC125) TA=–40°Cto125°C 1 6 (recommendedSN74AHC125) TA=25°C 4.6(1) 6.8(1) TA=–55°Cto125°C 1(1) 8(1) (SN54AHC125) tPHZ,tPLZ OE Y CL=15pF TA=–40°Cto85°C 1(1) 8(1) ns (SN74AHC125) TA=–40°Cto125°C 1(1) 8(1) (recommendedSN74AHC125) TA=25°C 5.3 7.5 TA=–55°Cto125°C 1 8.5 (SN54AHC125) tPLH,tPHL A Y CL=50pF TA=–40°Cto85°C 1 8.5 ns (SN74AHC125) TA=–40°Cto125°C 1 8.5 (recommendedSN74AHC125) TA=25°C 5.1 7.1 TA=–55°Cto125°C 1 8 (SN54AHC125) tPZH,tPZL OE Y CL=50pF TA=–40°Cto85°C 1 8 ns (SN74AHC125) TA=–40°Cto125°C 1 8 (recommendedSN74AHC125) TA=25°C 6.1 8.8 TA=–55°Cto125°C 1 10 (SN54AHC125) tPHZ,tPLZ OE Y CL=50pF TA=–40°Cto85°C 1 10 ns (SN74AHC125) TA=–40°Cto125°C 1 10 (recommendedSN74AHC125) TA=25°C 1(2) tsk(o) OE Y CL=50pF TA=–40°Cto85°C 1 ns (SN74AHC125) (1) OnproductscomplianttoMIL-PRF-38535,thisparameterisnotproductiontested. (2) OnproductscomplianttoMIL-PRF-38535,thisparameterdoesnotapply. Copyright©1995–2016,TexasInstrumentsIncorporated SubmitDocumentationFeedback 9 ProductFolderLinks:SN54AHC125 SN74AHC125

SN54AHC125,SN74AHC125 SCLS256L–DECEMBER1995–REVISEDNOVEMBER2016 www.ti.com 6.8 Noise Characteristics V =5V,C =50pF,andT =25°C(1) CC L A PARAMETER MIN MAX UNIT V Quietoutput,maximumdynamic(V ) 0.8 V OL(P) OL V Quietoutput,minimumdynamic(V ) –0.8 V OL(V) OL V Quietoutput,minimumdynamic(V ) 4.4 V OH(V) OH V High-leveldynamicinputvoltage 3.5 V IH(D) V Low-leveldynamicinputvoltage 1.5 V IL(D) (1) Characteristicsareforsurface-mountpackagesonly. 6.9 Operating Characteristics V =5VandT =25°C CC A PARAMETER TESTCONDITIONS TYP UNIT C Powerdissipationcapacitance Noloadandf=1MHz 9.5 pF pd 6.10 Typical Characteristics Figure1showsI forvaryingV valueswhenV is5V±0.5VandT =25°C. CC IN CC A 3.6 3.3 3 2.7 2.4 A) 2.1 m (C 1.8 C 1.5 I 1.2 0.9 0.6 0.3 0 0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 VIN (V) D001 Figure1.V vsI IN CC 10 SubmitDocumentationFeedback Copyright©1995–2016,TexasInstrumentsIncorporated ProductFolderLinks:SN54AHC125 SN74AHC125

SN54AHC125,SN74AHC125 www.ti.com SCLS256L–DECEMBER1995–REVISEDNOVEMBER2016 7 Parameter Measurement Information VCC FromOutput Test FromOutput RL=1kΩ S1 Open TEST S1 UnderTest Point UnderTest GND tPLH/tPHL Open CL CL tPLZ/tPZL VCC (seeNoteA) (seeNoteA) tPHZ/tPZH GND OpenDrain VCC LOADCIRCUITFOR LOADCIRCUITFOR TOTEM-POLEOUTPUTS 3-STATEANDOPEN-DRAINOUTPUTS VCC TimingInput 50%VCC tw th 0V VCC tsu VCC Input 50%VCC 50%VCC DataInput 50%VCC 50%VCC 0V 0V VOLTAGEWAVEFORMS VOLTAGEWAVEFORMS PULSEDURATION SETUPANDHOLDTIMES VCC VCC Output Input 50%VCC 50%VCC Control 50%VCC 50%VCC 0V 0V tPLH tPHL tPZL tPLZ Output VOH Waveform1 ≈VCC InO-Puhtapsuet 50%VCC 50%VCC S1atVCC 50%VCC VOL+0.3V VOL (seeNoteB) VOL tPHL tPLH tPZH tPHZ Output Out-ofO-Puhtapsuet 50%VCC 50%VCVVCOOHL (WseSae1veNaftooGtremNBD2) 50%VCC VOH–0.3VV≈0OVH VOLTAGEWAVEFORMS VOLTAGEWAVEFORMS PROPAGATIONDELAYTIMES ENABLEANDDISABLETIMES INVERTINGANDNONINVERTINGOUTPUTS LOW-ANDHIGH-LEVELENABLING A. C includesprobeandjigcapacitance. L B. Waveform1 is for an outputwith internalconditions such that theoutputis lowexceptwhendisabledby theoutput control.Waveform2isforanoutputwithinternalconditionssuchthattheoutputishighexceptwhendisabledbythe outputcontrol. C. Allinputpulsesaresuppliedbygeneratorshavingthefollowingcharacteristics:PRR≤1MHz,Z =50Ω,t ≤3ns,t O r f ≤3ns. D. Theoutputsaremeasuredoneatatimewithoneinputtransitionpermeasurement. E. Allparametersandwaveformsarenotapplicabletoalldevices. Figure2. LoadCircuitandVoltageWaveforms Copyright©1995–2016,TexasInstrumentsIncorporated SubmitDocumentationFeedback 11 ProductFolderLinks:SN54AHC125 SN74AHC125

SN54AHC125,SN74AHC125 SCLS256L–DECEMBER1995–REVISEDNOVEMBER2016 www.ti.com 8 Detailed Description 8.1 Overview The SNx4AHC125 devices have four integrated bus buffer gates. Each gate can be individually controlled from their respective output enable pins or tied together and controlled simultaneously. This allows for control of up to four different lines from one device. Often times a microcontroller have multiple function options for a single pin. ByusingGPIOpinstoenablespecificbuffers,theSNx4AHC125canactasamultiplexertoselectaspecificdata line depending on what pin function is selected on the microcontroller. At the same time, the lines that are not selectedareisolatedfromthepin. 8.2 Functional Block Diagram 1 10 1OE 3OE 2 3 9 8 1A 1Y 3A 3Y 4 13 2OE 4OE 5 6 12 11 2A 2Y 4A 4Y PinnumbersshownarefortheD,DB,DGV,J,N,NS,PW,RGY,andWpackages. 8.3 Feature Description Each buffer has its own output enable. This allows for control of each buffer individually. When the output enable is LOW, the input is passed to the output. When the output enable is HIGH, the output is high impedance. This featureisusefulinapplicationsthatmightrequireisolation. 8.4 Device Functional Modes Table1liststhefunctionalmodesoftheSNx4AHC125. Table1.FunctionTable (EachBuffer) INPUTS OUTPUT OE A Y L H H L L L H X Z 12 SubmitDocumentationFeedback Copyright©1995–2016,TexasInstrumentsIncorporated ProductFolderLinks:SN54AHC125 SN74AHC125

SN54AHC125,SN74AHC125 www.ti.com SCLS256L–DECEMBER1995–REVISEDNOVEMBER2016 9 Application and Implementation NOTE Information in the following applications sections is not part of the TI component specification, and TI does not warrant its accuracy or completeness. TI’s customers are responsible for determining suitability of components for their purposes. Customers should validateandtesttheirdesignimplementationtoconfirmsystemfunctionality. 9.1 Application Information The wide operating range of the SNx4AHC125 devices allows for implementation into a variety of applications. In addition to the wide operating range, these devices differentiate from similar devices because they have four buffersthatcanbeindividuallycontrolledthroughtheirindependentoutputenable(OE)pins.Eachbufferiseither enabledandpassesdatafromAtoY,ordisabledandsettoahigh-impedancestate. 9.2 Typical Application UART Select SPI Select 1 2 Vcc GPIO 1OE 1 14 UART TX/ SPI Out 1A 2 13 4OE 1Y 3 12 4A SPI IN MCU UART RX/ SPI In 2OE 4 11 4Y SN74AHC125 2A 5 10 3OE 2Y 6 9 3A UART RX 7 8 3Y GND SPI OUT UART TX Copyright © 2016, Texas Instruments Incorporated Figure3. DigitalMUX 9.2.1 DesignRequirements It is best to set V for the SN74AHC125 to the same level as the microcontroller logic levels. This allows for CC optimal performance. The SN74AHC125 can safely handle input levels from –0.5 V to 7 V. However, if the logic levels that are being received vary from the V level of the device then errors can occur. For example, if V is CC CC 5.5 V then the minimum high-level input voltage (V ) level is 3.85 V. This means if the microcontroller is sending IH a HIGH signal, but HIGH = 3.3 V, it would be too low a level for the SNx4AHC125 to register it as what it must be. In this case V would need to be lowered in order to lower the V minimum. The opposite is also true for CC IH low-level input voltage (V ). If VCC is set to 2 V, then V maximum is 0.5 V. Depending on the microcontroller IL IL logiclevels,aLOWsignalmaynotgolowenoughfortheSNx4AHC125toregisterit. Copyright©1995–2016,TexasInstrumentsIncorporated SubmitDocumentationFeedback 13 ProductFolderLinks:SN54AHC125 SN74AHC125

SN54AHC125,SN74AHC125 SCLS256L–DECEMBER1995–REVISEDNOVEMBER2016 www.ti.com Typical Application (continued) 9.2.2 DetailedDesignProcedure 1. RecommendedInputConditions: – ForV andV levelsatvaryingV ,seeRecommendedOperatingConditions. IH IL CC – Be mindful of rise time and fall time specifications for the output enable pins to ensure that the right buffers are enabled and the others are disabled in time. This minimizes interference on the microcontroller pin and to exterior circuitry. See Switching Characteristics: V = 3.3 V ±0.3 V and CC SwitchingCharacteristics:V =5V±0.5V tableformoredetails. CC 2. RecommendedOutputConditions: – Load currents must not exceed I maximum per output and must not exceed continuous current through O V orGNDtotalcurrentforthepart.TheselimitsarelocatedintheAbsoluteMaximumRatings. CC – OutputsmustnotbepulledaboveV . CC 9.2.3 ApplicationCurves Typicaldeviceat25°C 5.05 0.25 5 0.225 4.95 0.2 0.175 4.9 0.15 V) 4.85 V) V (OH 4.8 V (OL 0.125 0.1 4.75 0.075 4.7 0.05 4.65 0.025 4.6 0 -10 -9 -8 -7 -6 -5 -4 -3 -2 -1 0 0 1 2 3 4 5 6 7 8 9 10 IOH (mA) D001 IOL (mA) D001 Figure4.I vsV Figure5.I vsV OH OH OL OL 14 SubmitDocumentationFeedback Copyright©1995–2016,TexasInstrumentsIncorporated ProductFolderLinks:SN54AHC125 SN74AHC125

SN54AHC125,SN74AHC125 www.ti.com SCLS256L–DECEMBER1995–REVISEDNOVEMBER2016 10 Power Supply Recommendations The power supply can be any voltage between the minimum and maximum supply voltage rating located in the RecommendedOperatingConditions. EachV pinmusthaveagoodbypasscapacitortopreventpowerdisturbance.Fordeviceswithasinglesupply, CC a 0.1-µF capacitor is recommended and if there are multiple V pins then a 0.01-µF or 0.022-µF capacitor is CC recommended for each power pin. It is ok to parallel multiple bypass capacitors to reject different frequencies of noise. 0.1-µF and 1-µF capacitors are commonly used in parallel. The bypass capacitor must be installed as closetothepowerpinaspossibleforbestresults. 11 Layout 11.1 Layout Guidelines Whenusingmultiplebitlogicdevices,inputsmustnoteverfloat.Inmanycases,functionsorpartsoffunctionsof digital logic devices are unused; for example, when only two inputs of a triple-input AND gate are used or only 3 of the 4 buffer gates are used. Such input pins must not be left unconnected because the undefined voltages at the outside connections result in undefined operational states. Specified below are the rules that must be observed under all circumstances. All unused inputs of digital logic devices must be connected to a high or low biastopreventthemfromfloating.Thelogiclevelthatmustbeappliedtoanyparticularunusedinputdependson the function of the device. Generally, they are tied to GND or V (whichever make more sense or is more CC convenient). 11.2 Layout Example VCC Input Unused Input Output Unused Input Output Input Figure6. LayoutDiagram Copyright©1995–2016,TexasInstrumentsIncorporated SubmitDocumentationFeedback 15 ProductFolderLinks:SN54AHC125 SN74AHC125

SN54AHC125,SN74AHC125 SCLS256L–DECEMBER1995–REVISEDNOVEMBER2016 www.ti.com 12 Device and Documentation Support 12.1 Documentation Support 12.1.1 RelatedDocumentation Forrelateddocumentationseethefollowing: ImplicationsofSloworFloatingCMOSInputs (SCBA004) 12.2 Related Links The table below lists quick access links. Categories include technical documents, support and community resources,toolsandsoftware,andquickaccesstosampleorbuy. Table2.RelatedLinks TECHNICAL TOOLS& SUPPORT& PARTS PRODUCTFOLDER SAMPLE&BUY DOCUMENTS SOFTWARE COMMUNITY SN54AHC125 Clickhere Clickhere Clickhere Clickhere Clickhere SN74AHC125 Clickhere Clickhere Clickhere Clickhere Clickhere 12.3 Receiving Notification of Documentation Updates To receive notification of documentation updates, navigate to the device product folder on ti.com. In the upper right corner, click on Alert me to register and receive a weekly digest of any product information that has changed.Forchangedetails,reviewtherevisionhistoryincludedinanyreviseddocument. 12.4 Community Resources The following links connect to TI community resources. Linked contents are provided "AS IS" by the respective contributors. They do not constitute TI specifications and do not necessarily reflect TI's views; see TI's Terms of Use. TIE2E™OnlineCommunity TI'sEngineer-to-Engineer(E2E)Community.Createdtofostercollaboration amongengineers.Ate2e.ti.com,youcanaskquestions,shareknowledge,exploreideasandhelp solveproblemswithfellowengineers. DesignSupport TI'sDesignSupport QuicklyfindhelpfulE2Eforumsalongwithdesignsupporttoolsand contactinformationfortechnicalsupport. 12.5 Trademarks E2EisatrademarkofTexasInstruments. Allothertrademarksarethepropertyoftheirrespectiveowners. 12.6 Electrostatic Discharge Caution Thesedeviceshavelimitedbuilt-inESDprotection.Theleadsshouldbeshortedtogetherorthedeviceplacedinconductivefoam duringstorageorhandlingtopreventelectrostaticdamagetotheMOSgates. 12.7 Glossary SLYZ022—TIGlossary. Thisglossarylistsandexplainsterms,acronyms,anddefinitions. 13 Mechanical, Packaging, and Orderable Information The following pages include mechanical, packaging, and orderable information. This information is the most current data available for the designated devices. This data is subject to change without notice and revision of thisdocument.Forbrowser-basedversionsofthisdatasheet,refertotheleft-handnavigation. 16 SubmitDocumentationFeedback Copyright©1995–2016,TexasInstrumentsIncorporated ProductFolderLinks:SN54AHC125 SN74AHC125

PACKAGE OPTION ADDENDUM www.ti.com 6-Feb-2020 PACKAGING INFORMATION Orderable Device Status Package Type Package Pins Package Eco Plan Lead/Ball Finish MSL Peak Temp Op Temp (°C) Device Marking Samples (1) Drawing Qty (2) (6) (3) (4/5) 5962-9686801Q2A ACTIVE LCCC FK 20 1 TBD POST-PLATE N / A for Pkg Type -55 to 125 5962- 9686801Q2A SNJ54AHC 125FK 5962-9686801QCA ACTIVE CDIP J 14 1 TBD Call TI N / A for Pkg Type -55 to 125 5962-9686801QC A SNJ54AHC125J 5962-9686801QDA ACTIVE CFP W 14 1 TBD Call TI N / A for Pkg Type -55 to 125 5962-9686801QD A SNJ54AHC125W SN74AHC125D ACTIVE SOIC D 14 50 Green (RoHS NIPDAU Level-1-260C-UNLIM -40 to 125 AHC125 & no Sb/Br) SN74AHC125DBR ACTIVE SSOP DB 14 2000 Green (RoHS NIPDAU Level-1-260C-UNLIM -40 to 125 HA125 & no Sb/Br) SN74AHC125DG4 ACTIVE SOIC D 14 50 Green (RoHS NIPDAU Level-1-260C-UNLIM -40 to 125 AHC125 & no Sb/Br) SN74AHC125DGVR ACTIVE TVSOP DGV 14 2000 Green (RoHS NIPDAU Level-1-260C-UNLIM -40 to 125 HA125 & no Sb/Br) SN74AHC125DR ACTIVE SOIC D 14 2500 Green (RoHS NIPDAU Level-1-260C-UNLIM -40 to 125 AHC125 & no Sb/Br) SN74AHC125DRG4 ACTIVE SOIC D 14 2500 Green (RoHS NIPDAU Level-1-260C-UNLIM -40 to 125 AHC125 & no Sb/Br) SN74AHC125N ACTIVE PDIP N 14 25 Green (RoHS NIPDAU N / A for Pkg Type -40 to 125 SN74AHC125N & no Sb/Br) SN74AHC125NE4 ACTIVE PDIP N 14 25 Green (RoHS NIPDAU N / A for Pkg Type -40 to 125 SN74AHC125N & no Sb/Br) SN74AHC125NSR ACTIVE SO NS 14 2000 Green (RoHS NIPDAU Level-1-260C-UNLIM -40 to 125 AHC125 & no Sb/Br) SN74AHC125PW ACTIVE TSSOP PW 14 90 Green (RoHS NIPDAU Level-1-260C-UNLIM -40 to 125 HA125 & no Sb/Br) SN74AHC125PWR ACTIVE TSSOP PW 14 2000 Green (RoHS NIPDAU Level-1-260C-UNLIM -40 to 125 HA125 & no Sb/Br) SN74AHC125PWRE4 ACTIVE TSSOP PW 14 2000 Green (RoHS NIPDAU Level-1-260C-UNLIM -40 to 125 HA125 & no Sb/Br) Addendum-Page 1

PACKAGE OPTION ADDENDUM www.ti.com 6-Feb-2020 Orderable Device Status Package Type Package Pins Package Eco Plan Lead/Ball Finish MSL Peak Temp Op Temp (°C) Device Marking Samples (1) Drawing Qty (2) (6) (3) (4/5) SN74AHC125PWRG4 ACTIVE TSSOP PW 14 2000 Green (RoHS NIPDAU Level-1-260C-UNLIM -40 to 125 HA125 & no Sb/Br) SN74AHC125RGYR ACTIVE VQFN RGY 14 3000 Green (RoHS NIPDAU Level-2-260C-1 YEAR -40 to 125 HA125 & no Sb/Br) SN74AHC125RGYRG4 ACTIVE VQFN RGY 14 3000 Green (RoHS NIPDAU Level-2-260C-1 YEAR -40 to 125 HA125 & no Sb/Br) SNJ54AHC125FK ACTIVE LCCC FK 20 1 TBD POST-PLATE N / A for Pkg Type -55 to 125 5962- 9686801Q2A SNJ54AHC 125FK SNJ54AHC125J ACTIVE CDIP J 14 1 TBD Call TI N / A for Pkg Type -55 to 125 5962-9686801QC A SNJ54AHC125J SNJ54AHC125W ACTIVE CFP W 14 1 TBD Call TI N / A for Pkg Type -55 to 125 5962-9686801QD A SNJ54AHC125W (1) The marketing status values are defined as follows: ACTIVE: Product device recommended for new designs. LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect. NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design. PREVIEW: Device has been announced but is not in production. Samples may or may not be available. OBSOLETE: TI has discontinued the production of the device. (2) RoHS: TI defines "RoHS" to mean semiconductor products that are compliant with the current EU RoHS requirements for all 10 RoHS substances, including the requirement that RoHS substance do not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, "RoHS" products are suitable for use in specified lead-free processes. TI may reference these types of products as "Pb-Free". RoHS Exempt: TI defines "RoHS Exempt" to mean products that contain lead but are compliant with EU RoHS pursuant to a specific EU RoHS exemption. Green: TI defines "Green" to mean the content of Chlorine (Cl) and Bromine (Br) based flame retardants meet JS709B low halogen requirements of <=1000ppm threshold. Antimony trioxide based flame retardants must also meet the <=1000ppm threshold requirement. (3) MSL, Peak Temp. - The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature. (4) There may be additional marking, which relates to the logo, the lot trace code information, or the environmental category on the device. (5) Multiple Device Markings will be inside parentheses. Only one Device Marking contained in parentheses and separated by a "~" will appear on a device. If a line is indented then it is a continuation of the previous line and the two combined represent the entire Device Marking for that device. Addendum-Page 2

PACKAGE OPTION ADDENDUM www.ti.com 6-Feb-2020 (6) Lead/Ball Finish - Orderable Devices may have multiple material finish options. Finish options are separated by a vertical ruled line. Lead/Ball Finish values may wrap to two lines if the finish value exceeds the maximum column width. Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals. TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release. In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI to Customer on an annual basis. OTHER QUALIFIED VERSIONS OF SN54AHC125, SN74AHC125 : •Catalog: SN74AHC125 •Automotive: SN74AHC125-Q1, SN74AHC125-Q1 •Enhanced Product: SN74AHC125-EP, SN74AHC125-EP •Military: SN54AHC125 NOTE: Qualified Version Definitions: •Catalog - TI's standard catalog product •Automotive - Q100 devices qualified for high-reliability automotive applications targeting zero defects •Enhanced Product - Supports Defense, Aerospace and Medical Applications •Military - QML certified for Military and Defense Applications Addendum-Page 3

PACKAGE MATERIALS INFORMATION www.ti.com 20-Dec-2018 TAPE AND REEL INFORMATION *Alldimensionsarenominal Device Package Package Pins SPQ Reel Reel A0 B0 K0 P1 W Pin1 Type Drawing Diameter Width (mm) (mm) (mm) (mm) (mm) Quadrant (mm) W1(mm) SN74AHC125DGVR TVSOP DGV 14 2000 330.0 12.4 6.8 4.0 1.6 8.0 12.0 Q1 SN74AHC125DR SOIC D 14 2500 330.0 16.4 6.5 9.0 2.1 8.0 16.0 Q1 SN74AHC125DR SOIC D 14 2500 330.0 16.4 6.5 9.0 2.1 8.0 16.0 Q1 SN74AHC125NSR SO NS 14 2000 330.0 16.4 8.2 10.5 2.5 12.0 16.0 Q1 SN74AHC125PWR TSSOP PW 14 2000 330.0 12.4 6.9 5.6 1.6 8.0 12.0 Q1 PackMaterials-Page1

PACKAGE MATERIALS INFORMATION www.ti.com 20-Dec-2018 *Alldimensionsarenominal Device PackageType PackageDrawing Pins SPQ Length(mm) Width(mm) Height(mm) SN74AHC125DGVR TVSOP DGV 14 2000 367.0 367.0 35.0 SN74AHC125DR SOIC D 14 2500 333.2 345.9 28.6 SN74AHC125DR SOIC D 14 2500 367.0 367.0 38.0 SN74AHC125NSR SO NS 14 2000 367.0 367.0 38.0 SN74AHC125PWR TSSOP PW 14 2000 367.0 367.0 35.0 PackMaterials-Page2

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MECHANICAL DATA MPDS006C – FEBRUARY 1996 – REVISED AUGUST 2000 DGV (R-PDSO-G**) PLASTIC SMALL-OUTLINE 24 PINS SHOWN 0,23 0,40 0,07 M 0,13 24 13 0,16 NOM 4,50 6,60 4,30 6,20 Gage Plane 0,25 0°–(cid:1)8° 0,75 1 12 0,50 A Seating Plane 0,15 1,20 MAX 0,08 0,05 PINS ** 14 16 20 24 38 48 56 DIM A MAX 3,70 3,70 5,10 5,10 7,90 9,80 11,40 A MIN 3,50 3,50 4,90 4,90 7,70 9,60 11,20 4073251/E 08/00 NOTES: A. All linear dimensions are in millimeters. B. This drawing is subject to change without notice. C. Body dimensions do not include mold flash or protrusion, not to exceed 0,15 per side. D. Falls within JEDEC: 24/48 Pins – MO-153 14/16/20/56 Pins – MO-194 • POST OFFICE BOX 655303 DALLAS, TEXAS 75265

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PACKAGE OUTLINE J0014A CDIP - 5.08 mm max height SCALE 0.900 CERAMIC DUAL IN LINE PACKAGE PIN 1 ID A 4X .005 MIN (OPTIONAL) [0.13] .015-.060 TYP [0.38-1.52] 1 14 12X .100 [2.54] 14X .014-.026 14X .045-.065 [0.36-0.66] [1.15-1.65] .010 [0.25] C A B .754-.785 [19.15-19.94] 7 8 B .245-.283 .2 MAX TYP .13 MIN TYP [6.22-7.19] [5.08] [3.3] SEATING PLANE C .308-.314 [7.83-7.97] AT GAGE PLANE .015 GAGE PLANE [0.38] 0 -15 14X .008-.014 TYP [0.2-0.36] 4214771/A 05/2017 NOTES: 1. All controlling linear dimensions are in inches. Dimensions in brackets are in millimeters. Any dimension in brackets or parenthesis are for reference only. Dimensioning and tolerancing per ASME Y14.5M. 2. This drawing is subject to change without notice. 3. This package is hermitically sealed with a ceramic lid using glass frit. 4. Index point is provided on cap for terminal identification only and on press ceramic glass frit seal only. 5. Falls within MIL-STD-1835 and GDIP1-T14. www.ti.com

EXAMPLE BOARD LAYOUT J0014A CDIP - 5.08 mm max height CERAMIC DUAL IN LINE PACKAGE (.300 ) TYP [7.62] SEE DETAIL B SEE DETAIL A 1 14 12X (.100 ) [2.54] SYMM 14X ( .039) [1] 7 8 SYMM LAND PATTERN EXAMPLE NON-SOLDER MASK DEFINED SCALE: 5X .002 MAX (.063) [0.05] [1.6] METAL ALL AROUND ( .063) SOLDER MASK [1.6] OPENING METAL .002 MAX SOLDER MASK (R.002 ) TYP [0.05] OPENING [0.05] ALL AROUND DETAIL A DETAIL B SCALE: 15X 13X, SCALE: 15X 4214771/A 05/2017 www.ti.com

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MECHANICAL DATA MSSO002E – JANUARY 1995 – REVISED DECEMBER 2001 DB (R-PDSO-G**) PLASTIC SMALL-OUTLINE 28 PINS SHOWN 0,38 0,65 0,15 M 0,22 28 15 0,25 0,09 5,60 8,20 5,00 7,40 Gage Plane 1 14 0,25 A 0°–(cid:1)8° 0,95 0,55 Seating Plane 2,00 MAX 0,05 MIN 0,10 PINS ** 14 16 20 24 28 30 38 DIM A MAX 6,50 6,50 7,50 8,50 10,50 10,50 12,90 A MIN 5,90 5,90 6,90 7,90 9,90 9,90 12,30 4040065/E 12/01 NOTES: A. All linear dimensions are in millimeters. B. This drawing is subject to change without notice. C. Body dimensions do not include mold flash or protrusion not to exceed 0,15. D. Falls within JEDEC MO-150 • POST OFFICE BOX 655303 DALLAS, TEXAS 75265

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