Product Sample & Technical Tools & Support & Folder Buy Documents Software Community SN65HVD1785,SN65HVD1786,SN65HVD1787 SN65HVD1791,SN65HVD1792,SN65HVD1793 SLLS872I–JANUARY2008–REVISEDAUGUST2015 SN65HVD17xx Fault-Protected RS-485 Transceivers With Extended Common-Mode Range 1 Features 3 Description • Bus-PinFaultProtectionto: These devices are designed to survive overvoltage 1 faults such as direct shorts to power supplies, mis- – > ±70V('HVD1785,86,91,92) wiring faults, connector failures, cable crushes, and – > ±30V('HVD1787,93) tool mis-applications. They are also robust to ESD • Common-ModeVoltageRange(–20Vto25V) events, with high levels of protection to human-body MoreThanDoublesTIA/EIA485Requirement modelspecifications. • BusI/OProtection These devices combine a differential driver and a differential receiver, which operate from a single – ±16kVJEDECHBMProtection power supply. In the 'HVD1785, 'HVD1786, and • ReducedUnitLoadforUpto256Nodes 'HVD1787, the driver differential outputs and the • FailsafeReceiverforOpen-Circuit,Short-Circuit receiver differential inputs are connected internally to andIdle-BusConditions form a bus port suitable for half-duplex (two-wire bus) communication. In the 'HVD1793, the driver • LowPowerConsumption differential outputs and the receiver differential inputs – LowStandbySupplyCurrent,1 μATypical are separate pins, to form a bus port suitable for full- – I 5mAQuiescentDuringOperation duplex (four-wire bus) communication. These ports CC • Power-Up,Power-DownGlitch-FreeOperation feature a wide common-mode voltage range, making the devices suitable for multipoint applications over 2 Applications long cable runs. These devices are characterized from –40°Cto105°C. • DesignedforRS-485andRS-422Networks For similar features with 3.3-V supply operation, see theSN65HVD1781(SLLS877). DeviceInformation(1) PARTNUMBER PACKAGE BODYSIZE(NOM) SN65HVD1785, SOIC(8) 4.90mm×3.91mm SN65HVD1786, SN65HVD1787 PDIP(8) 9.81mm×6.35mm SN65HVD1791, SN65HVD1792, SOIC(14) 8.65mm×3.91mm SN65HVD1793 (1) For all available packages, see the orderable addendum at theendofthedatasheet. ExampleofBusShorttoPowerSupply V up to 70 V FAULT M0092-01 1 An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications, intellectualpropertymattersandotherimportantdisclaimers.PRODUCTIONDATA.

SN65HVD1785,SN65HVD1786,SN65HVD1787 SN65HVD1791,SN65HVD1792,SN65HVD1793 SLLS872I–JANUARY2008–REVISEDAUGUST2015 www.ti.com Table of Contents 1 Features.................................................................. 1 9.2 FunctionalBlockDiagram.......................................15 2 Applications........................................................... 1 9.3 FeatureDescription.................................................15 3 Description............................................................. 1 9.4 DeviceFunctionalModes........................................18 4 RevisionHistory..................................................... 2 10 ApplicationandImplementation........................ 19 10.1 ApplicationInformation..........................................19 5 ProductSelectionGuide....................................... 4 10.2 TypicalApplication ...............................................19 6 PinConfigurationandFunctions......................... 4 11 PowerSupplyRecommendations..................... 21 7 Specifications......................................................... 5 12 Layout................................................................... 22 7.1 AbsoluteMaximumRatings .....................................5 12.1 LayoutGuidelines.................................................22 7.2 ESDRatings..............................................................6 12.2 LayoutExample....................................................22 7.3 RecommendedOperatingConditions.......................6 13 DeviceandDocumentationSupport................. 23 7.4 ThermalInformation..................................................6 7.5 ElectricalCharacteristics...........................................7 13.1 DocumentationSupport........................................23 7.6 ThermalConsiderations............................................8 13.2 RelatedLinks........................................................23 7.7 SwitchingCharacteristics..........................................8 13.3 CommunityResources..........................................24 7.8 TypicalCharacteristics............................................10 13.4 Trademarks...........................................................24 13.5 ElectrostaticDischargeCaution............................24 8 ParameterMeasurementInformation................11 13.6 Glossary................................................................24 9 DetailedDescription............................................ 15 14 Mechanical,Packaging,andOrderable 9.1 Overview.................................................................15 Information........................................................... 24 4 Revision History NOTE:Pagenumbersforpreviousrevisionsmaydifferfrompagenumbersinthecurrentversion. ChangesfromRevisionH(February2010)toRevisionI Page • AddedPinConfigurationandFunctionssection,ESDRatingstable,FeatureDescriptionsection,DeviceFunctional Modes,ApplicationandImplementationsection,PowerSupplyRecommendationssection,Layoutsection,Device andDocumentationSupportsection,andMechanical,Packaging,andOrderableInformationsection .............................. 1 ChangesfromRevisionG(April2009)toRevisionH Page • Deleted70-Vfromthedatasheettitle.................................................................................................................................... 1 • ChangedfirstFeaturesBulletFrom:Bus-PinFaultProtectionto>±70VTo:Bus-PinFaultProtectionto:>±70V ('HVD1785,86,91,92),>±30V('HVD1787,93)..................................................................................................................... 1 • ChangedVoltagerangeatAandBinputsintheABSMAXRATINGStable,addingseperateconditionsforthe differentdevices...................................................................................................................................................................... 5 • ChangedFrom:Voltageinputrange,transientpulse,AandB,through100ΩTo:Transientovervoltagepulse through100ΩperTIA-485..................................................................................................................................................... 5 • Addedthe70-VFault-Protectionsection.............................................................................................................................. 16 ChangesfromRevisionF(November2008)toRevisionG Page • AddedI =–400μAconditionsandvaluestotheReceiverhigh-leveloutputvoltage........................................................ 7 OH • AddedReceiverenabledV >V ...................................................................................................................................... 8 CM CC • AddedReceiverFailsafeinformation.................................................................................................................................... 15 • ChangedtheReceiverFailsafesection................................................................................................................................ 16 2 SubmitDocumentationFeedback Copyright©2008–2015,TexasInstrumentsIncorporated ProductFolderLinks:SN65HVD1785 SN65HVD1786 SN65HVD1787SN65HVD1791 SN65HVD1792 SN65HVD1793

SN65HVD1785,SN65HVD1786,SN65HVD1787 SN65HVD1791,SN65HVD1792,SN65HVD1793 www.ti.com SLLS872I–JANUARY2008–REVISEDAUGUST2015 ChangesfromRevisionE(July2008)toRevisionF Page • AddedtoTitle:WithExtendedCommon-ModeRange.......................................................................................................... 1 • AddedReceiverenabledV >V conditionandvaluestotheDriverenabledtime ......................................................... 8 CM CC • AddedFigure4 .................................................................................................................................................................... 10 ChangesfromRevisionD(June2008)toRevisionE Page • Changed-RemovedProductPreviewlabel.......................................................................................................................... 4 • ChangedSN65HVD1792RemovedProductPreviewlabel................................................................................................... 4 • ChangedSN65HVD1793RemovedProductPreviewlabel................................................................................................... 4 ChangesfromRevisionC(March2008)toRevisionD Page • AddedFeaturesBullet:Power-Up,Power-DownGlitch-FreeOperation................................................................................ 1 • Changed(Preview)topartnumberSN65HVD1791intheProductSelectionGuide............................................................. 4 • Addedsection-APPLICATIONINFORMATION.................................................................................................................. 15 • ChangedReceiverdisabledbydefault-EnablefromXtoOPEN.OutputfromOPENtoZ............................................... 18 ChangesfromRevisionB(March2008)toRevisionC Page • ChangedRecOpTable.Signalingrate,HVD1787,HVD1793From:20Mbpsmaxto10Mbpsmax.................................. 6 ChangesfromRevisionA(March2008)toRevisionB Page • AddedT ≤85°CandT ≤105°CconditionsandvaluestotheReceiverlow-leveloutputvoltage...................................... 7 A A • ChangedthemaxvalueforSupplyCurrent(quiescent)Driverandreceiverdisabled,From1μATo5μA.........................7 ChangesfromOriginal(January2008)toRevisionA Page • ChangedFeaturesBulletFrom:LowStandbySupplyCurrent,2μAMaxTo:LowStandbySupplyCurrent,1μATyp.......1 • DeletedcolumnstothePRODUCTSELECTIONGUIDEforPackageOptionsandStatus.................................................. 4 • Addedtext:Forsimilarfeatureswith3.3Vsupplyoperation................................................................................................. 4 • ChangedtheProductSelectionGuideSignalingRateforSN65HVD1787From20MbpsTo:10Mbps.............................. 4 • ChangedtheProductSelectionGuideSignalingRateforSN65HVD1793From20MbpsTo:10Mbps.............................. 4 • DeletedTheCompetitiveComparisontable........................................................................................................................... 5 • Added|V |RS-485withcommon-modeloadT ≤85°CandT ≤105°C............................................................................ 7 OD A A • ChangedΔV Frommin=-0.2mVandmax0.2mVTo:min=-100mVandmax100mV............................................... 7 OC • ChangedHVD1785/1791Driverdifferentialoutputrise/falltimemaxvalueFrom2.5μsTo:2.6μs.................................... 8 • ChangedHVD1787/1793Driverdifferentialoutputrise/falltimemaxvalueFrom1.5nsTo:30ns...................................... 8 • ChangedReceiverpropagationdelaymaxvalueFrom50nsTo:70ns............................................................................... 9 • Changedt ,t ReceiverdisabletimeFrom3000nsTo100ns....................................................................................... 9 PLZ PHZ • DeletedgraphDIFFERENTIALOUTPUTVOLTAGEvsDIFFERENTIALLOADCURRENT.............................................. 10 Copyright©2008–2015,TexasInstrumentsIncorporated SubmitDocumentationFeedback 3 ProductFolderLinks:SN65HVD1785 SN65HVD1786 SN65HVD1787SN65HVD1791 SN65HVD1792 SN65HVD1793

SN65HVD1785,SN65HVD1786,SN65HVD1787 SN65HVD1791,SN65HVD1792,SN65HVD1793 SLLS872I–JANUARY2008–REVISEDAUGUST2015 www.ti.com 5 Product Selection Guide PARTNUMBER DUPLEX SIGNALINGRATE NODES CABLELENGTH SN65HVD1785 Half 115kbps Upto256 1500m SN65HVD1786 Half 1Mbps Upto256 150m SN65HVD1787 Half 10Mbps Upto64 50m SN65HVD1791 Full 115kbps Upto256 1500m SN65HVD1792 Full 1Mbps Upto256 150m SN65HVD1793 Full 10Mbps Upto64 50m 6 Pin Configuration and Functions DorPPackage 8-PinSOICorPDIP SN65HVD1785,1786,1787TopView R 1 8 VCC RE 2 7 B DE 3 6 A D 4 5 GND PinFunctions(SN65HVD1785,SN65HVD1786,SN65HVD1787) PIN TYPE DESCRIPTION NAME NO. Bus A 6 Driveroutputorreceiverinput(complementarytoB) input/output Bus B 7 Driveroutputorreceiverinput(complementarytoA) input/output D 4 Digitalinput Driverdatainput DE 3 Digitalinput Driverenable,activehigh Reference GND 5 Localdeviceground potential R 1 Digitaloutput Receivedataoutput RE 2 Digitalinput Receiverenable,activelow V 8 Supply 4.5-V-to-5.5-Vsupply CC 4 SubmitDocumentationFeedback Copyright©2008–2015,TexasInstrumentsIncorporated ProductFolderLinks:SN65HVD1785 SN65HVD1786 SN65HVD1787SN65HVD1791 SN65HVD1792 SN65HVD1793

SN65HVD1785,SN65HVD1786,SN65HVD1787 SN65HVD1791,SN65HVD1792,SN65HVD1793 www.ti.com SLLS872I–JANUARY2008–REVISEDAUGUST2015 DPackage 14-PinSOIC SN65VD1791,1792,1793TopView NC 1 14 VCC R 2 13 VCC RE 3 12 A DE 4 11 B D 5 10 Z GND 6 9 Y GND 7 8 NC NC-Nointernalconnection Pins6and7areconnectedtogetherinternally. Pins13and14areconnectedtogetherinternally. PinFunctions(SN65HVD1791,SN65HVD1792,SN65HVD1793) PIN TYPE DESCRIPTION NAME NO. A 12 Businput Receiverinput(complementarytoB) B 11 Businput Receiverinput(complementarytoA) Y 9 Busoutput Driveroutput(complementarytoZ) Z 10 Busoutput Driveroutput(complementarytoY) D 5 Digitalinput Driverdatainput DE 4 Digitalinput Driverenable,activehigh Reference GND 6,7 Localdeviceground potential R 2 Digitaloutput Receivedataoutput RE 3 Digitalinput Receiverenable,activelow V 13,14 Supply 4.5-Vto5.5-Vsupply CC NC 1,8 Noconnect Noconnect;shouldbeleftfloating 7 Specifications 7.1 Absolute Maximum Ratings(1) MIN MAX UNIT V Supplyvoltage –0.5 7 V CC 'HVD1785,86,91,92,93 A,Bpins –70 70 V Voltageatbuspins 'HVD1787 A,Bpins –70 30 V 'HVD1793 Y,Zpins –70 30 V Inputvoltageatanylogicpin –0.3 V +0.3 V CC Transientovervoltagepulsethrough100ΩperTIA-485 –100 100 V Receiveroutputcurrent –24 24 mA T Junctiontemperature 170 °C J T Storagetemperature 160 °C stg (1) StressesbeyondthoselistedunderAbsoluteMaximumRatingsmaycausepermanentdamagetothedevice.Thesearestressratings onlyandfunctionaloperationofthedeviceattheseoranyotherconditionsbeyondthoseindicatedunderRecommendedOperating Conditionsisnotimplied.Exposuretoabsolute-maximum-ratedconditionsforextendedperiodsmayaffectdevicereliability. Copyright©2008–2015,TexasInstrumentsIncorporated SubmitDocumentationFeedback 5 ProductFolderLinks:SN65HVD1785 SN65HVD1786 SN65HVD1787SN65HVD1791 SN65HVD1792 SN65HVD1793

SN65HVD1785,SN65HVD1786,SN65HVD1787 SN65HVD1791,SN65HVD1792,SN65HVD1793 SLLS872I–JANUARY2008–REVISEDAUGUST2015 www.ti.com 7.2 ESD Ratings VALUE UNIT Humanbodymodel(HBM),perANSI/ESDA/JEDECJS-001(1), BusterminalsandGND ±16000 JEDECStandard22,TestMethodA114 Allpins ±4000 Electrostatic Charged-devicemodel(CDM),perJEDECspecificationJESD22-C101(2), V ±2000 V (ESD) discharge JEDECStandard22,TestMethodC101 MachineModel,JEDECStandard22,TestMethodA115 ±400 IEC60749-26ESD(human-bodymodel) BusterminalsandGND ±16000 (1) JEDECdocumentJEP155statesthat500-VHBMallowssafemanufacturingwithastandardESDcontrolprocess. (2) JEDECdocumentJEP157statesthat250-VCDMallowssafemanufacturingwithastandardESDcontrolprocess. 7.3 Recommended Operating Conditions MIN NOM MAX UNIT V Supplyvoltage 4.5 5 5.5 V CC V Inputvoltageatanybusterminal(separatelyorcommonmode)(1) –20 25 V I V High-levelinputvoltage(driver,driverenable,andreceiverenableinputs) 2 V V IH CC V Low-levelinputvoltage(driver,driverenable,andreceiverenableinputs) 0 0.8 V IL V Differentialinputvoltage –25 25 V ID Outputcurrent,driver –60 60 mA I O Outputcurrent,receiver –8 8 mA R Differentialloadresistance 54 60 Ω L C Differentialloadcapacitance 50 pF L HVD1785,HVD1791 115 kbps 1/t Signalingrate HVD1786,HVD1792 1 UI Mbps HVD1787,HVD1793 10 T Operatingfree-airtemperature(seeapplicationsectionforthermalinformation) –40 105 °C A T Junctiontemperature –40 150 °C J (1) Byconvention,theleastpositive(mostnegative)limitisdesignatedasminimuminthisdatasheet. 7.4 Thermal Information SN65HVD1791, SN65HVD1785,SN65HVD1786, SN65HVD1792, SN65HVD1787 THERMALMETRIC(1) SN65HVD1793 UNIT D(SOIC) P(PDIP) D(SOIC) 8PINS 8PINS 14PINS R Junction-to-ambientthermalresistance 138 59 95 °C/W θJA R Junction-to-case(top)thermalresistance 242 128 168 °C/W θJA(low-K) R Junction-to-boardthermalresistance 61 61 44 °C/W θJC(top) R Junction-to-topcharacterizationparameter 62 39 40 °C/W θJB ψ Junction-to-boardcharacterizationparameter 3.4 17.6 8.2 °C/W JT ψ Junction-to-case(bottom)thermalresistance 33.4 28.3 25 °C/W JB (1) Formoreinformationabouttraditionalandnewthermalmetrics,seetheSemiconductorandICPackageThermalMetricsapplication report,SPRA953. 6 SubmitDocumentationFeedback Copyright©2008–2015,TexasInstrumentsIncorporated ProductFolderLinks:SN65HVD1785 SN65HVD1786 SN65HVD1787SN65HVD1791 SN65HVD1792 SN65HVD1793

SN65HVD1785,SN65HVD1786,SN65HVD1787 SN65HVD1791,SN65HVD1792,SN65HVD1793 www.ti.com SLLS872I–JANUARY2008–REVISEDAUGUST2015 7.5 Electrical Characteristics overrecommendedoperatingconditions(unlessotherwisenoted) PARAMETER TESTCONDITIONS MIN TYP MAX UNIT RS-485with T ≤85°C 1.5 A common-modeload, VCC>4.75V, TA≤105°C 1.4 |VOD| Driverdifferentialoutputvoltagemagnitude seeFigure5 V R =54Ω,4.75V≤V ≤5.25V 1.5 2 L CC R =100Ω,4.75V≤V ≤5.25V 2 2.5 L CC Changeinmagnitudeofdriverdifferentialoutput Δ|V | R =54Ω –0.2 0 0.2 V OD voltage L V Steady-statecommon-modeoutputvoltage 1 V /2 3 V OC(SS) CC Changeindifferentialdriveroutputcommon- ΔV –100 0 100 mV OC modevoltage Peak-to-peakdrivercommon-modeoutput Centeroftwo27-Ωloadresistors, V 500 mV OC(PP) voltage seeFigure6 C Differentialoutputcapacitance 23 pF OD Positive-goingreceiverdifferentialinputvoltage V –100 –10 mV IT+ threshold Negative-goingreceiverdifferentialinput V V =–20Vto25V –200 –150 mV IT– voltagethreshold CM Receiverdifferentialinputvoltagethreshold V 30 50 mV HYS hysteresis(V –V ) IT+ IT– V I =–8mA 2.4 CC V Receiverhigh-leveloutputvoltage OH –0.3 V OH I =–400μA 4 OH T ≤85°C 0.2 0.4 A V Receiverlow-leveloutputvoltage I =8mA V OL OL T ≤105°C 0.2 0.5 A Driverinput,driverenable,andreceiverenable I –100 100 μA I inputcurrent I Receiveroutputhigh-impedancecurrent V =0VorV ,REatV –1 1 μA OZ O CC CC I Drivershort-circuitoutputcurrent –250 250 mA OS 85,86, VI=12V 75 125 I Businputcurrent(disableddriver) VCC=4.5to5.5Vor 91,92 VI=–7V –100 –40 μA I VCC=0V,DEat0V VI=12V 500 87,93 V =–7V –400 I DE=V , Driverandreceiver CC RE=GND, 4 6 enabled noload DE=V , Driverenabled, CC RE=V , 3 5 mA receiverdisabled CC noload ICC Supplycurrent(quiescent) DE=GND, Driverdisabled, RE=GND, 2 4 receiverenabled noload DE=GND, Driverandreceiver D=open 0.5 5 μA disabled RE=V , CC noload Supplycurrent(dynamic) SeeTypicalCharacteristics Copyright©2008–2015,TexasInstrumentsIncorporated SubmitDocumentationFeedback 7 ProductFolderLinks:SN65HVD1785 SN65HVD1786 SN65HVD1787SN65HVD1791 SN65HVD1792 SN65HVD1793

SN65HVD1785,SN65HVD1786,SN65HVD1787 SN65HVD1791,SN65HVD1792,SN65HVD1793 SLLS872I–JANUARY2008–REVISEDAUGUST2015 www.ti.com 7.6 Thermal Considerations PARAMETER TESTCONDITIONS VALUE UNIT V =5.5V,T =150°C,R =300Ω,C =50pF(driver), 85,91 CCC=15pF(recJeiver)5-VsuLpply,untermLinated(1) 290 L 85,91 V =5.5V,T =150°C,R =100Ω,C =50pF(driver), 86 CCC=15pF(recJeiver)5-VsuLpply,RS-42L2load(1) 320 P Powerdissipation L mW D 87 85,91 V =5.5V,T =150°C,R =54Ω,C =50pF(driver), 86 CCC=15pF(recJeiver)5-VsuLpply,RS-4L85load(1) 400 L 87 Thermal-shutdownjunction T 170 °C SD temperature (1) Driverandreceiverenabled,50%dutycyclesquare-wavesignalatsignalingrate:HVD1785,1791at115kbps,HVD1786at1Mbps, HVD1787at10Mbps) 7.7 Switching Characteristics overrecommendedoperatingconditions(unlessotherwisenoted) PARAMETER TESTCONDITIONS MIN TYP MAX UNIT DRIVER(HVD1785ANDHVD1791) t,t Driverdifferentialoutputrise/falltime 0.4 1.7 2.6 μs r f t ,t Driverpropagationdelay R =54Ω,C =50pF, 0.8 2 μs PHL PLH L L seeFigure7 Driverdifferentialoutputpulseskew, t 20 250 ns SK(P) |t –t | PHL PLH t ,t Driverdisabletime 0.1 5 μs PHZ PLZ SeeFigure8and Receiverenabled 0.2 3 t ,t Driverenabletime Figure9 μs PZH PZL Receiverdisabled 3 12 DRIVER(HVD1786ANDHVD1792) t,t Driverdifferentialoutputrise/falltime 50 300 ns r f t ,t Driverpropagationdelay R =54Ω,C =50pF, 200 ns PHL PLH L L seeFigure7 Driverdifferentialoutputpulseskew, t 25 ns SK(P) |t –t | PHL PLH t ,t Driverdisabletime 3 μs PHZ PLZ SeeFigure8and Receiverenabled 300 ns Figure9 t ,t Driverenabletime Receiverdisabled 10 μs PZH PZL Receiverenabled V >V 500 ns CM CC DRIVER(HVD1787ANDHVD1793) t,t Driverdifferentialoutputrise/falltime 3 30 ns r f t ,t Driverpropagationdelay R =54Ω,C =50pF, 50 ns PHL PLH L L seeFigure7 Driverdifferentialoutputpulseskew, t 10 ns SK(P) |t –t | PHL PLH t ,t Driverdisabletime 3 μs PHZ PLZ SeeFigure8and Receiverenabled 300 ns Figure9 t ,t Driverenabletime Receiverdisabled 9 μs PZH PZL Receiverenabled V >V 500 ns CM CC 8 SubmitDocumentationFeedback Copyright©2008–2015,TexasInstrumentsIncorporated ProductFolderLinks:SN65HVD1785 SN65HVD1786 SN65HVD1787SN65HVD1791 SN65HVD1792 SN65HVD1793

SN65HVD1785,SN65HVD1786,SN65HVD1787 SN65HVD1791,SN65HVD1792,SN65HVD1793 www.ti.com SLLS872I–JANUARY2008–REVISEDAUGUST2015 Switching Characteristics (continued) overrecommendedoperatingconditions(unlessotherwisenoted) PARAMETER TESTCONDITIONS MIN TYP MAX UNIT RECEIVER(ALLDEVICESUNLESSOTHERWISENOTED) t,t Receiveroutputrise/falltime 4 15 ns r f 85,86,91,92 100 200 tPHL,tPLH Receiverpropagationdelaytime CL=15pF, 87,93 70 ns seeFigure10 Receiveroutputpulseskew, 85,86,91,92 6 20 t ns SK(P) |tPHL–tPLH| 87,93 5 t ,t Receiverdisabletime Driverenabled,seeFigure11 15 100 ns PLZ PHZ t ,t Driverenabled,seeFigure11 80 300 ns PZL(1) PZH(1) t ),t Receiverenabletime PZL(2 PZH(2) Driverdisabled,seeFigure12 3 9 μs Copyright©2008–2015,TexasInstrumentsIncorporated SubmitDocumentationFeedback 9 ProductFolderLinks:SN65HVD1785 SN65HVD1786 SN65HVD1787SN65HVD1791 SN65HVD1792 SN65HVD1793

SN65HVD1785,SN65HVD1786,SN65HVD1787 SN65HVD1791,SN65HVD1792,SN65HVD1793 SLLS872I–JANUARY2008–REVISEDAUGUST2015 www.ti.com 7.8 Typical Characteristics 70 120 TA= 25°C TA= 25°C 60 DE at VCC REat VCC D at VCC DE at VCC mA 50 RL= 54W mA 100 RL= 54W − − CL= 50 pF nt nt VCC= 5 V e 40 e urr urr C C utput 30 upply 80 O S ver 20 MS Dri R − − 10 C 60 O C I I 0 −10 40 0.0 0.6 1.2 1.8 2.4 3.0 3.6 4.2 4.8 5.4 0 2 4 6 8 10 VCC−Supply Voltage−V Signaling Rate−Mbps G001 G002 Figure1.DriverOutputCurrentvsSupplyVoltage Figure2.HVD1787RMSSupplyCurrentvsSignalingRate 2.0 4.4 4.2 Load = 300W Load = 100W 4 1.5 3.8 VCC= 5.5 V ge - V 33..46 VCC= 5 V mA 1.0 Volta 3.32 Load = 60W ent− 0.5 Output 222...468 Curr 0.0 ntial 2.22 Bus Pin −0.5 D - Differe 1111....2468 −N VO 0.81 VCC= 4.5 V II −1.0 0.6 0.4 0.2 −1.5 0 0 2 4 6 8 101214161820222426283032343638404244464850 Idiff -Differential Load Current - mA −2.0 −90 −60 −30 0 30 60 90 VIN−Bus Pin Voltage−V G004 Figure3.BusPinCurrentvsBusPinVoltage Figure4.DifferentialOutputVoltagevs.DifferentialLoad Current 10 SubmitDocumentationFeedback Copyright©2008–2015,TexasInstrumentsIncorporated ProductFolderLinks:SN65HVD1785 SN65HVD1786 SN65HVD1787SN65HVD1791 SN65HVD1792 SN65HVD1793

SN65HVD1785,SN65HVD1786,SN65HVD1787 SN65HVD1791,SN65HVD1792,SN65HVD1793 www.ti.com SLLS872I–JANUARY2008–REVISEDAUGUST2015 8 Parameter Measurement Information Inputgeneratorrateis100kbps,50%dutycycle,riseandfalltimeslessthan6nsec,outputimpedance50 Ω. V 375W±1% CC DE A D 0 V or 3 V VOD 60W±1% + B _ –20 V < V(test) < 25 V 375W±1% S0301-01 Figure5. MeasurementofDriverDifferentialOutputVoltageWithCommon-ModeLoad V CC 27W±1% A VA DE A D B VB Input B VOC VOC(PP) DVOC(SS) 27W±1% CL= 50 pF±20% V OC C Includes Fixture and L Instrumentation Capacitance S0302-01 Figure6. MeasurementofDriverDifferentialandCommon-ModeOutputWithRS-485Load V 3 V CC DE C = 50 pF±20% VI 50% 50% A L D VOD CLIncludes Fixture tPLH tPHL»2 V GeInnepruattor VI 50W B R±1L%= 54W aCnadp aIncsittarunmceentation VOD 0 V 90% 90% 0 V 10% 10% »–2 V t t r f S0303-01 Figure7. MeasurementofDriverDifferentialOutputRiseandFallTimesandPropagationDelays 3 V A 3 V D S1 VO VI 50% 50% B 0 V GeInnepruattor VI 50DWE CLCILnc=l u5d0e ps FFi±x2tu0r%e R±L1%= 110W tPZH 0.5 V 90%VOH and Instrumentation V Capacitance O 50% »0 V t PHZ S0304-01 NOTE: Dat3Vtotestnon-invertingoutput,Dat0Vtotestinvertingoutput. Figure8. MeasurementofDriverEnableandDisableTimesWithActiveHighOutputandPulldownLoad Copyright©2008–2015,TexasInstrumentsIncorporated SubmitDocumentationFeedback 11 ProductFolderLinks:SN65HVD1785 SN65HVD1786 SN65HVD1787SN65HVD1791 SN65HVD1792 SN65HVD1793

SN65HVD1785,SN65HVD1786,SN65HVD1787 SN65HVD1791,SN65HVD1792,SN65HVD1793 SLLS872I–JANUARY2008–REVISEDAUGUST2015 www.ti.com Parameter Measurement Information (continued) 3 V RL= 110W »3 V ±1% D A S1 V VI 50% 50% 3 V O 0 V B t t DE PZL PLZ CL= 50 pF±20% »3 V Input Generator VI 50W aCnLd IInncslturudmese Fntixattuiorne VO 50% 10% Capacitance V OL S0305-01 NOTE: Dat0Vtotestnon-invertingoutput,Dat3Vtotestinvertingoutput. Figure9. MeasurementofDriverEnableandDisableTimesWithActive-LowOutputandPullupLoad A Input V 50W R VO Generator I B 1.5 V C = 15 pF±20% L RE 0 V C Includes Fixture L and Instrumentation Capacitance 3 V VI 50% 50% 0 V t t PLH PHL V 90% 90% OH VO 50% 50% 10% 10% V OL t t r f S0306-01 Figure10. MeasurementofReceiverOutputRiseandFallTimesandPropagationDelays 12 SubmitDocumentationFeedback Copyright©2008–2015,TexasInstrumentsIncorporated ProductFolderLinks:SN65HVD1785 SN65HVD1786 SN65HVD1787SN65HVD1791 SN65HVD1792 SN65HVD1793

SN65HVD1785,SN65HVD1786,SN65HVD1787 SN65HVD1791,SN65HVD1792,SN65HVD1793 www.ti.com SLLS872I–JANUARY2008–REVISEDAUGUST2015 Parameter Measurement Information (continued) 3 V V CC DE A 0 V or 3 V D R VO 1 kW±1% S1 B C = 15 pF±20% RE L C Includes Fixture L and Instrumentation Input V 50W Capacitance Generator I 3 V VI 50% 50% 0 V t t PZH(1) PHZ V OH D at 3 V 90% S1 to GND VO 50% »0 V t t PZL(1) PLZ V CC D at 0 V VO 50% S1 to VCC 10% V OL S0307-01 Figure11. MeasurementofReceiverEnable/DisableTimesWithDriverEnabled Copyright©2008–2015,TexasInstrumentsIncorporated SubmitDocumentationFeedback 13 ProductFolderLinks:SN65HVD1785 SN65HVD1786 SN65HVD1787SN65HVD1791 SN65HVD1792 SN65HVD1793

SN65HVD1785,SN65HVD1786,SN65HVD1787 SN65HVD1791,SN65HVD1792,SN65HVD1793 SLLS872I–JANUARY2008–REVISEDAUGUST2015 www.ti.com Parameter Measurement Information (continued) V CC A 0 V or 1.5 V R VO 1 kW±1% S1 B 1.5 V or 0 V RE CL= 15 pF±20% C Includes Fixture L and Instrumentation Input Generator VI 50W Capacitance 3 V VI 50% 0 V t PZH(2) V OH Aat 1.5 V VO 50% B at 0 V S1 to GND GND t PZL(2) V CC Aat 0 V VO 50% B at 1.5 V S1 to V CC V OL S0308-01 Figure12. MeasurementofReceiverEnableTimesWithDriverDisabled 14 SubmitDocumentationFeedback Copyright©2008–2015,TexasInstrumentsIncorporated ProductFolderLinks:SN65HVD1785 SN65HVD1786 SN65HVD1787SN65HVD1791 SN65HVD1792 SN65HVD1793

SN65HVD1785,SN65HVD1786,SN65HVD1787 SN65HVD1791,SN65HVD1792,SN65HVD1793 www.ti.com SLLS872I–JANUARY2008–REVISEDAUGUST2015 9 Detailed Description 9.1 Overview The SN65HVD17xx family of RS-485 transceivers are designed to operate up to 115 kbps (HVD1785 and HVD1791), 1 Mbps (HVD1786 and HVD1792), or 10 Mbps (HVD1787 or HVD1793) and to withstand DC overvoltage faults on the bus interface pins. This helps to protect the devices against damages resulting from directshortstopowersupplies,cablemis-wirings,connectorfailures,orothercommonfaults. TheSN65HVD178xdevicesarehalf-duplex,andthushavethetransmitterandreceiverbusinterfacesconnected together internally. The SN65HVD179x family leaves these two interfaces separate, allowing for full-duplex communication. The low receiver loading allows for up to 256 nodes to share a common RS-485 bus. The devices feature a wide common-mode range as well as fail-safe receivers, which ensure a stable logic-level outputduringbusopen,short,oridleconditions. 9.2 Functional Block Diagram 3 DE 4 D 2 RE 6 1 A R 7 Bus B Figure13. Half-DuplexTransceiver Logic Diagram (Positive Logic) 4 DE 9 Y 5 D 10 Z 3 RE 12 2 A R 11 B S0300-01 Figure14. FullDuplexTransceiver 9.3 Feature Description 9.3.1 Hot-Plugging These devices are designed to operate in hot swap or hot pluggable applications. Key features for hot-pluggable applications are power-up, power-down glitch free operation, default disabled input/output pins, and receiver failsafe. As shown in Figure 1, an internal Power-On Reset circuit keeps the driver outputs in a high-impedance state until the supply voltage has reached a level at which the device will reliably operate. This ensures that no spurioustransitions(glitches)willoccuronthebuspinoutputsasthepowersupplyturnsonorturnsoff. As shown in Device Functional Modes, the ENABLE inputs have the feature of default disable on both the driver enable and receiver enable. This ensures that the device will neither drive the bus nor report data on the R pin untiltheassociatedcontrolleractivelydrivestheenablepins. Copyright©2008–2015,TexasInstrumentsIncorporated SubmitDocumentationFeedback 15 ProductFolderLinks:SN65HVD1785 SN65HVD1786 SN65HVD1787SN65HVD1791 SN65HVD1792 SN65HVD1793

SN65HVD1785,SN65HVD1786,SN65HVD1787 SN65HVD1791,SN65HVD1792,SN65HVD1793 SLLS872I–JANUARY2008–REVISEDAUGUST2015 www.ti.com Feature Description (continued) 9.3.2 ReceiverFailsafe Thedifferentialreceiverisfailsafetoinvalidbusstatescausedby: • openbusconditionssuchasadisconnectedconnector, • shortedbusconditionssuchascabledamageshortingthetwisted-pairtogether, • oridlebusconditionsthatoccurwhennodriveronthebusisactivelydriving. In any of these cases, the differential receiver outputs a failsafe logic High state, so that the output of the receiverisnotindeterminate. In the HVD17xx family of RS-485 devices, receiver failsafe is accomplished by offsetting the receiver thresholds sothatthe“inputindeterminate”rangedoesnotincludezerovoltsdifferential.InordertocomplywiththeRS-422 and RS-485 standards, the receiver output must output a High when the differential input V is more positive ID than 200 mV, and must output a Low when the V is more negative than -200 mV. The HVD17xx receiver ID parameters which determine the failsafe performance are V and V and V . In the Electrical Characteristics IT+ IT– HYS table, V has a typical value of –150 mV and a minimum (most negative) value of -200 mV, so differential IT– signals more negative than -200 mV will always cause a Low receiver output. Similarly, differential signals more positive than 200 mV will always cause a High receiver output, because the typical value of V is -100mV, and IT+ V is never more positive than -10 mV under any conditions of temperature, supply voltage, or common-mode IT+ offset. When the differential input signal is close to zero, it will still be above the V threshold, and the receiver output IT+ will be High. Only when the differential input is more negative than V will the receiver output transition to a Low IT- state. So, the noise immunity of the receiver inputs during a bus fault condition includes the receiver hysteresis valueV (theseparationbetweenV andV )aswellasthevalueofV . HYS IT+ IT– IT+ For the HVD17xx devices, the typical noise immunity is typically about 150 mV, which is the negative noise level neededtoexceedtheV threshold(V TYP=–150mV).Intheworstcase,thefailsafenoiseimmunityisnever IT– IT- less than 40 mV, which is set by the maximum positive threshold (V MAX = –10 mV) plus the minimum IT+ hysteresisvoltage(V MIN=30mV). HYS 9.3.3 70-VFault-Protection The SN65HVD17xx family of RS-485 devices is designed to survive bus pin faults up to ±70V. The devices designed for fast signaling rate (10 Mbps) will not survive a bus pin fault with a direct short to voltages above 30Vwhen: 1. thedeviceispoweredonAND 2a. thedriverisenabled(DE=HIGH)ANDD=HIGHANDthebusfaultisappliedtotheApinOR 2b. thedriverisenabled(DE=HIGH)ANDD=LOWANDthebusfaultisappliedtotheBpin Under other conditions, the device will survive shorts to bus pin faults up to 70V. Table 1 summarizes the conditions under which the device may be damaged, and the conditions under which the device will not be damaged. 16 SubmitDocumentationFeedback Copyright©2008–2015,TexasInstrumentsIncorporated ProductFolderLinks:SN65HVD1785 SN65HVD1786 SN65HVD1787SN65HVD1791 SN65HVD1792 SN65HVD1793

SN65HVD1785,SN65HVD1786,SN65HVD1787 SN65HVD1791,SN65HVD1792,SN65HVD1793 www.ti.com SLLS872I–JANUARY2008–REVISEDAUGUST2015 Feature Description (continued) Table1.DeviceConditions POWER DE D A B RESULTS OFF X X -70V<V <70V -70V<V <70V Devicesurvives A B ON LO X -70V<V <70V -70V<V <70V Devicesurvives A B ON HI L -70V<V <70V -70V<V <30V Devicesurvives A B ON HI L -70V<V <70V 30V<V Damagemayoccur A B ON HI H -70V<V <30V -70V<V <30V Devicesurvives A B ON HI H 30V<V -70V<V <30V Damagemayoccur A B 9.3.4 AdditionalOptions The SN65HVD17xx family also has options for J1708 applications, for always-enabled full-duplex versions (industry-standard SN65LBC179 footprint) and for inverting-polarity versions, which allow users to correct a reversal of the bus wires without re-wiring. Contact your local Texas Instruments representative for information ontheseoptions. Table2.SN65HVD17xxOptionsforJ1708Applications PARTNUMBER SN65HVD17xx FOOTPRINT/FUNCTION SLOW MEDIUM FAST Half-duplex(176pinout) 85 86 87 Full-duplexnoenables(179pinout) 88 89 90 Full-duplexwithenables(180pinout) 91 92 93 Half-duplexwithcableinvert 94 95 96 Full-duplexwithcableinvertandenables 97 98 99 J1708 08 09 10 1 R 2 RE 6 A 4 D 7 B 3 DE S0309-01 Figure15. SN65HVD1708ETransceiverforJ1708Applications 5 Y 3 D 6 Z 8 A 2 R 7 B S0310-01 Figure16. SN65HVD17xxAlways-EnabledDriverReceiver Copyright©2008–2015,TexasInstrumentsIncorporated SubmitDocumentationFeedback 17 ProductFolderLinks:SN65HVD1785 SN65HVD1786 SN65HVD1787SN65HVD1791 SN65HVD1792 SN65HVD1793

SN65HVD1785,SN65HVD1786,SN65HVD1787 SN65HVD1791,SN65HVD1792,SN65HVD1793 SLLS872I–JANUARY2008–REVISEDAUGUST2015 www.ti.com 1 R 2 INV 6 A 4 D 7 B 3 DE 1 RINV 2 12 R A 11 B 3 RE 9 8 Y DINV 5 D 10 Z 4 DE S0311-01 Figure17. SN65HVD17xxOptionsWithInvertingFeaturetoCorrectforMiswiredCables 9.4 Device Functional Modes Table3.DriverFunctionTable INPUT ENABLE OUTPUTS D DE A B H H H L Activelydrivebushigh L H L H Activelydrivebuslow X L Z Z Driverdisabled X OPEN Z Z Driverdisabledbydefault OPEN H H L Activelydrivebushighbydefault Table4.ReceiverFunctionTable DIFFERENTIALINPUT ENABLE OUTPUT VID=VA–VB RE R VIT+<VID L H Receivevalidbushigh VIT–<VID<VIT+ L ? Indeterminatebusstate VID<VIT– L L Receivevalidbuslow X H Z Receiverdisabled X OPEN Z Receiverdisabledbydefault Open-circuitbus L H Fail-safehighoutput Short-circuitbus L H Fail-safehighoutput Idle(terminated)bus L H Fail-safehighoutput 18 SubmitDocumentationFeedback Copyright©2008–2015,TexasInstrumentsIncorporated ProductFolderLinks:SN65HVD1785 SN65HVD1786 SN65HVD1787SN65HVD1791 SN65HVD1792 SN65HVD1793

SN65HVD1785,SN65HVD1786,SN65HVD1787 SN65HVD1791,SN65HVD1792,SN65HVD1793 www.ti.com SLLS872I–JANUARY2008–REVISEDAUGUST2015 10 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. 10.1 Application Information The SN65HVD17xx family consists of both half-duplex and full-duplex transceivers that can be used for asynchronous data communication. Half-duplex implementations require one signaling pair (two wires), while full- duplex implementations require two signaling pairs (four wires). The driver and receiver enable pins of the SN65HVD17xxfamilyallowforcontroloverthedirectionofdataflow.Sinceitiscommonformultipletransceivers to share a common communications bus, care should be taken at the system level to ensure that only one driver is enabled at a time. This avoids bus contention, a fault condition in which multiple drivers attempt to send data atthesametime. 10.2 Typical Application An RS-485 bus consists of multiple transceivers connecting in parallel to a bus cable. To eliminate line reflections, each cable end is terminated with a termination resistor, R , whose value matches the characteristic T impedance, Z , of the cable. This method, known as parallel termination, allows for higher data rates over longer 0 cablelength. R R R R A A RE RE B RT RT B DE DE D D D D A B A B R R D D R RE DE D R RE DE D Figure18. TypicalRS-485NetworkWithHalf-duplexTransceivers Y A R D Z RT RT B R R DE RE Master Slave RE DE B Z D R A RT RT Y D D A B Z Y R Slave D R REDE D Figure19. TypicalRS-485NetworkWithFull-duplexTransceivers Copyright©2008–2015,TexasInstrumentsIncorporated SubmitDocumentationFeedback 19 ProductFolderLinks:SN65HVD1785 SN65HVD1786 SN65HVD1787SN65HVD1791 SN65HVD1792 SN65HVD1793

SN65HVD1785,SN65HVD1786,SN65HVD1787 SN65HVD1791,SN65HVD1792,SN65HVD1793 SLLS872I–JANUARY2008–REVISEDAUGUST2015 www.ti.com Typical Application (continued) 10.2.1 DesignRequirements RS-485 is a robust electrical standard suitable for long-distance networking that may be used in a wide range of applicationswithvaryingrequirements,suchasdistance,datarate,andnumberofnodes. 10.2.1.1 DataRateandBusLength There is an inverse relationship between data rate and cable length, which means the higher the data rate, the short the cable length; and conversely, the lower the data rate, the longer the cable length. While most RS-485 systems use data rates between 10 kbps and 100 kbps, some applications require data rates up to 250 kbps at distances of 4000 feet and longer. Longer distances are possible by allowing for small signal jitter of up to 5 or 10%. 10000 5%, 10%, and 20% Jitter h (ft) 1000 gt Conservative n e Characteristics L e bl 100 a C 10 100 1k 10k 100k 1M 10M 100M Data Rate(bps) Figure20. CableLengthvsDataRateCharacteristic Even higher data rates are achievable (for example, 10 Mbps for the SN65HVD1787 and SN65HVD1793) in cases where the interconnect is short enough (or has suitably low attenuation at signal frequencies) to not degradethedata. 10.2.1.2 StubLength When connecting a node to the bus, the distance between the transceiver inputs and the cable trunk, known as the stub, should be as short as possible. Stubs present a non-terminated piece of bus line which can introduce reflections as the length of the stub increases. As a general guideline, the electrical length, or round-trip delay, of a stub should be less than one-tenth of the rise time of the driver, thus giving a maximum physical stub length as showninEquation1. L £0.1´t ´v´c stub r where • t isthe10/90risetimeofthedriver r • cisthespeedoflight(3×108m/s) • visthesignalvelocityofthecableortraceasafactorofc (1) 10.2.1.3 ReceiverFailsafe ThedifferentialreceiveroftheSN75HVD17xxfamilyis failsafetoinvalidbusstatescausedby: • Openbusconditions,suchasadisconnectedconnector • Shortedbusconditions,suchascabledamageshortingthetwisted-pairtogether • Idlebusconditionsthatoccurwhennodriveronthebusisactivelydriving n any of these cases, the differential receiver will output a failsafe logic high state so that the output of the receiverisnotindeterminate. 20 SubmitDocumentationFeedback Copyright©2008–2015,TexasInstrumentsIncorporated ProductFolderLinks:SN65HVD1785 SN65HVD1786 SN65HVD1787SN65HVD1791 SN65HVD1792 SN65HVD1793

SN65HVD1785,SN65HVD1786,SN65HVD1787 SN65HVD1791,SN65HVD1792,SN65HVD1793 www.ti.com SLLS872I–JANUARY2008–REVISEDAUGUST2015 Typical Application (continued) Receiver failsafe is accomplished by offsetting the receiver thresholds such that the “input indeterminate” range does not include zero volts differential. In order to comply with the RS-422 and RS-485 standards, the receiver output must output a high when the differential input V is more positive than +200 mV, and must output a low ID whenVIDismorenegativethan-200mV.Thereceiverparameterswhichdeterminethefailsafeperformanceare V and V . As shown in the Electrical Characteristics table, differential signals more negative than -200 mV IT(+) IT(-) will always cause a low receiver output, and differential signals more positive than +200 mV will always cause a highreceiveroutput. Whenthedifferentialinputsignalisclosetozero,itisstillabovethemaximumV thresholdof-10mV,andthe IT(+) receiveroutputwillbehigh. 10.2.2 DetailedDesignProcedure Although the SN65HVD17xx family is internally protected against human-body-model ESD strikes up to 16 kV, additional protection against higher-energy transients can be provided at the application level by implementing externalprotectiondevices. 10.2.3 ApplicationCurve Figure21. SN65HVD1785DifferentialOutputat115kbps 11 Power Supply Recommendations To ensure reliable operation at all data rates and supply voltages, each supply should be decoupled with a 100- nF ceramic capacitor located as close to the supply pins as possible. This helps to reduce supply voltage ripple present on the outputs of switched-mode power supplies and also helps to compensate for the resistance and inductanceofthePCBpowerplanes. Copyright©2008–2015,TexasInstrumentsIncorporated SubmitDocumentationFeedback 21 ProductFolderLinks:SN65HVD1785 SN65HVD1786 SN65HVD1787SN65HVD1791 SN65HVD1792 SN65HVD1793

SN65HVD1785,SN65HVD1786,SN65HVD1787 SN65HVD1791,SN65HVD1792,SN65HVD1793 SLLS872I–JANUARY2008–REVISEDAUGUST2015 www.ti.com 12 Layout 12.1 Layout Guidelines To ensure reliable operation at all data rates and supply voltages, each supply should be decoupled with a 100- nF ceramic capacitor located as close to the supply pins as possible. This helps to reduce supply voltage ripple present on the outputs of switched-mode power supplies and also helps to compensate for the resistance and inductanceofthePCBpowerplanes. 1. Placetheprotectioncircuitryclosetothebusconnectortopreventnoisetransientsfromenteringtheboard. 2. Use V and ground planes to provide low-inductance power distribution. Note that high-frequency currents CC tendtofollowthepathofleastinductanceandnotthepathofleastresistance. 3. Design the protection components into the direction of the signal path. Do not force the transient currents to divertfromthesignalpathtoreachtheprotectiondevice. 4. Apply 100-nF-to-220-nF bypass capacitors as close as possible to the V pins of transceiver, UART, or CC controllerICsontheboard. 5. Use at least two vias for V and ground connections of bypass capacitors and protection devices to CC minimizeeffectivevia-inductance. 6. Use 1-kΩ-to-10-kΩ pullup and pulldown resistors for enable lines to limit noise currents in these lines during transientevents. 7. Insert series pulse-proof resistors into the A and B bus lines if the TVS clamping voltage is higher than the specified maximum voltage of the transceiver bus terminals. These resistors limit the residual clamping currentintothetransceiverandpreventitfromlatchingup. 8. While pure TVS protection is sufficient for surge transients up to 1 kV, higher transients require metal-oxide varistors (MOVs) which reduce the transients to a few hundred volts of clamping voltage, and transient blockingunits(TBUs)thatlimittransientcurrenttolessthan1mA. 12.2 Layout Example 5 Via to ground R C 4 Via to VCC 6 R 1 R MCU P 7 R M 5 J R TVS 6 R SN65HVD1785 5 Figure22. LayoutExample(Half-DuplexTransceiver) 22 SubmitDocumentationFeedback Copyright©2008–2015,TexasInstrumentsIncorporated ProductFolderLinks:SN65HVD1785 SN65HVD1786 SN65HVD1787SN65HVD1791 SN65HVD1792 SN65HVD1793

SN65HVD1785,SN65HVD1786,SN65HVD1787 SN65HVD1791,SN65HVD1792,SN65HVD1793 www.ti.com SLLS872I–JANUARY2008–REVISEDAUGUST2015 Layout Example (continued) 5 C 4 R Via to ground Via to V CC 6 R 1 R P M MCU 7 R 5 J TVS R 6 R R 1 7 R P M R 5 J TVS 5 SN65HVD1791 Figure23. LayoutExample(Full-DuplexTransceiver) 13 Device and Documentation Support 13.1 Documentation Support Forrelateddocumentationseethefollowing: SN65HVD1781,Fault-ProtectedRS-485TransceiversWith3.3-Vto5-VOperation,(SLLS877) 13.2 Related Links The table below lists quick access links. Categories include technical documents, support and community resources,toolsandsoftware,andquickaccesstosampleorbuy. Table5.RelatedLinks TECHNICAL TOOLS& SUPPORT& PARTS PRODUCTFOLDER SAMPLE&BUY DOCUMENTS SOFTWARE COMMUNITY SN65HVD1785 Clickhere Clickhere Clickhere Clickhere Clickhere SN65HVD1786 Clickhere Clickhere Clickhere Clickhere Clickhere SN65HVD1787 Clickhere Clickhere Clickhere Clickhere Clickhere SN65HVD1791 Clickhere Clickhere Clickhere Clickhere Clickhere SN65HVD1792 Clickhere Clickhere Clickhere Clickhere Clickhere SN65HVD1793 Clickhere Clickhere Clickhere Clickhere Clickhere Copyright©2008–2015,TexasInstrumentsIncorporated SubmitDocumentationFeedback 23 ProductFolderLinks:SN65HVD1785 SN65HVD1786 SN65HVD1787SN65HVD1791 SN65HVD1792 SN65HVD1793

SN65HVD1785,SN65HVD1786,SN65HVD1787 SN65HVD1791,SN65HVD1792,SN65HVD1793 SLLS872I–JANUARY2008–REVISEDAUGUST2015 www.ti.com 13.3 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. 13.4 Trademarks E2EisatrademarkofTexasInstruments. Allothertrademarksarethepropertyoftheirrespectiveowners. 13.5 Electrostatic Discharge Caution Thesedeviceshavelimitedbuilt-inESDprotection.Theleadsshouldbeshortedtogetherorthedeviceplacedinconductivefoam duringstorageorhandlingtopreventelectrostaticdamagetotheMOSgates. 13.6 Glossary SLYZ022—TIGlossary. Thisglossarylistsandexplainsterms,acronyms,anddefinitions. 14 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. 24 SubmitDocumentationFeedback Copyright©2008–2015,TexasInstrumentsIncorporated ProductFolderLinks:SN65HVD1785 SN65HVD1786 SN65HVD1787SN65HVD1791 SN65HVD1792 SN65HVD1793

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) SN65HVD1785D ACTIVE SOIC D 8 75 Green (RoHS NIPDAU Level-1-260C-UNLIM -40 to 105 VP1785 & no Sb/Br) SN65HVD1785DG4 ACTIVE SOIC D 8 75 Green (RoHS NIPDAU Level-1-260C-UNLIM -40 to 105 VP1785 & no Sb/Br) SN65HVD1785DR ACTIVE SOIC D 8 2500 Green (RoHS NIPDAU Level-1-260C-UNLIM -40 to 105 VP1785 & no Sb/Br) SN65HVD1785DRG4 ACTIVE SOIC D 8 2500 Green (RoHS NIPDAU Level-1-260C-UNLIM -40 to 105 VP1785 & no Sb/Br) SN65HVD1785P ACTIVE PDIP P 8 50 Green (RoHS NIPDAU N / A for Pkg Type -40 to 105 65HVD1785 & no Sb/Br) SN65HVD1786D ACTIVE SOIC D 8 75 Green (RoHS NIPDAU Level-1-260C-UNLIM -40 to 105 VP1786 & no Sb/Br) SN65HVD1786DR ACTIVE SOIC D 8 2500 Green (RoHS NIPDAU Level-1-260C-UNLIM -40 to 105 VP1786 & no Sb/Br) SN65HVD1786DRG4 ACTIVE SOIC D 8 2500 Green (RoHS NIPDAU Level-1-260C-UNLIM -40 to 105 VP1786 & no Sb/Br) SN65HVD1786P ACTIVE PDIP P 8 50 Green (RoHS NIPDAU N / A for Pkg Type -40 to 105 65HVD1786 & no Sb/Br) SN65HVD1787D ACTIVE SOIC D 8 75 Green (RoHS NIPDAU Level-1-260C-UNLIM -40 to 105 VP1787 & no Sb/Br) SN65HVD1787DR ACTIVE SOIC D 8 2500 Green (RoHS NIPDAU Level-1-260C-UNLIM -40 to 105 VP1787 & no Sb/Br) SN65HVD1787P ACTIVE PDIP P 8 50 Green (RoHS NIPDAU N / A for Pkg Type -40 to 105 65HVD1787 & no Sb/Br) SN65HVD1791D ACTIVE SOIC D 14 50 Green (RoHS NIPDAU Level-1-260C-UNLIM -40 to 105 VP1791 & no Sb/Br) SN65HVD1791DG4 ACTIVE SOIC D 14 50 Green (RoHS NIPDAU Level-1-260C-UNLIM -40 to 105 VP1791 & no Sb/Br) SN65HVD1791DR ACTIVE SOIC D 14 2500 Green (RoHS NIPDAU Level-1-260C-UNLIM -40 to 105 VP1791 & no Sb/Br) SN65HVD1791DRG4 ACTIVE SOIC D 14 2500 Green (RoHS NIPDAU Level-1-260C-UNLIM -40 to 105 VP1791 & no Sb/Br) SN65HVD1792D ACTIVE SOIC D 14 50 Green (RoHS NIPDAU Level-1-260C-UNLIM -40 to 105 VP1792 & 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) SN65HVD1792DR ACTIVE SOIC D 14 2500 Green (RoHS NIPDAU Level-1-260C-UNLIM -40 to 105 VP1792 & no Sb/Br) SN65HVD1793D ACTIVE SOIC D 14 50 Green (RoHS NIPDAU Level-1-260C-UNLIM -40 to 105 VP1793 & no Sb/Br) SN65HVD1793DR ACTIVE SOIC D 14 2500 Green (RoHS NIPDAU Level-1-260C-UNLIM -40 to 105 VP1793 & no Sb/Br) (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. (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. Addendum-Page 2

PACKAGE OPTION ADDENDUM www.ti.com 6-Feb-2020 OTHER QUALIFIED VERSIONS OF SN65HVD1792 : •Enhanced Product: SN65HVD1792-EP NOTE: Qualified Version Definitions: •Enhanced Product - Supports Defense, Aerospace and Medical Applications Addendum-Page 3

PACKAGE MATERIALS INFORMATION www.ti.com 20-Mar-2015 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) SN65HVD1785DR SOIC D 8 2500 330.0 12.4 6.4 5.2 2.1 8.0 12.0 Q1 SN65HVD1786DR SOIC D 8 2500 330.0 12.4 6.4 5.2 2.1 8.0 12.0 Q1 SN65HVD1787DR SOIC D 8 2500 330.0 12.4 6.4 5.2 2.1 8.0 12.0 Q1 SN65HVD1791DR SOIC D 14 2500 330.0 16.4 6.5 9.0 2.1 8.0 16.0 Q1 SN65HVD1792DR SOIC D 14 2500 330.0 16.4 6.5 9.0 2.1 8.0 16.0 Q1 SN65HVD1793DR SOIC D 14 2500 330.0 16.4 6.5 9.0 2.1 8.0 16.0 Q1 PackMaterials-Page1

PACKAGE MATERIALS INFORMATION www.ti.com 20-Mar-2015 *Alldimensionsarenominal Device PackageType PackageDrawing Pins SPQ Length(mm) Width(mm) Height(mm) SN65HVD1785DR SOIC D 8 2500 367.0 367.0 35.0 SN65HVD1786DR SOIC D 8 2500 367.0 367.0 35.0 SN65HVD1787DR SOIC D 8 2500 367.0 367.0 35.0 SN65HVD1791DR SOIC D 14 2500 367.0 367.0 38.0 SN65HVD1792DR SOIC D 14 2500 367.0 367.0 38.0 SN65HVD1793DR SOIC D 14 2500 367.0 367.0 38.0 PackMaterials-Page2

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PACKAGE OUTLINE D0008A SOIC - 1.75 mm max height SCALE 2.800 SMALL OUTLINE INTEGRATED CIRCUIT C SEATING PLANE .228-.244 TYP [5.80-6.19] .004 [0.1] C A PIN 1 ID AREA 6X .050 [1.27] 8 1 2X .189-.197 [4.81-5.00] .150 NOTE 3 [3.81] 4X (0 -15 ) 4 5 8X .012-.020 B .150-.157 [0.31-0.51] .069 MAX [3.81-3.98] .010 [0.25] C A B [1.75] NOTE 4 .005-.010 TYP [0.13-0.25] 4X (0 -15 ) SEE DETAIL A .010 [0.25] .004-.010 0 - 8 [0.11-0.25] .016-.050 [0.41-1.27] DETAIL A (.041) TYPICAL [1.04] 4214825/C 02/2019 NOTES: 1. Linear dimensions are in inches [millimeters]. Dimensions in parenthesis are for reference only. Controlling dimensions are in inches. Dimensioning and tolerancing per ASME Y14.5M. 2. This drawing is subject to change without notice. 3. This dimension does not include mold flash, protrusions, or gate burrs. Mold flash, protrusions, or gate burrs shall not exceed .006 [0.15] per side. 4. This dimension does not include interlead flash. 5. Reference JEDEC registration MS-012, variation AA. www.ti.com

EXAMPLE BOARD LAYOUT D0008A SOIC - 1.75 mm max height SMALL OUTLINE INTEGRATED CIRCUIT 8X (.061 ) [1.55] SYMM SEE DETAILS 1 8 8X (.024) [0.6] SYMM (R.002 ) TYP [0.05] 5 4 6X (.050 ) [1.27] (.213) [5.4] LAND PATTERN EXAMPLE EXPOSED METAL SHOWN SCALE:8X SOLDER MASK SOLDER MASK METAL OPENING OPENING METAL UNDER SOLDER MASK EXPOSED METAL EXPOSED METAL .0028 MAX .0028 MIN [0.07] [0.07] ALL AROUND ALL AROUND NON SOLDER MASK SOLDER MASK DEFINED DEFINED SOLDER MASK DETAILS 4214825/C 02/2019 NOTES: (continued) 6. Publication IPC-7351 may have alternate designs. 7. Solder mask tolerances between and around signal pads can vary based on board fabrication site. www.ti.com

EXAMPLE STENCIL DESIGN D0008A SOIC - 1.75 mm max height SMALL OUTLINE INTEGRATED CIRCUIT 8X (.061 ) [1.55] SYMM 1 8 8X (.024) [0.6] SYMM (R.002 ) TYP [0.05] 5 4 6X (.050 ) [1.27] (.213) [5.4] SOLDER PASTE EXAMPLE BASED ON .005 INCH [0.125 MM] THICK STENCIL SCALE:8X 4214825/C 02/2019 NOTES: (continued) 8. Laser cutting apertures with trapezoidal walls and rounded corners may offer better paste release. IPC-7525 may have alternate design recommendations. 9. Board assembly site may have different recommendations for stencil design. www.ti.com

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