SN65176B_07中文资料

12348765RREDEDVCCBAGNDSN65176B,SN75176B–JULY1985–REVISEDJANUARY2014SNx5176BDifferentialBusTransceiversCheckforSamples:SN65176B,SN75176B1FEATURESDESCRIPTIONTheSN65176BandSN75176Bdifferentialbus•BidirectionalTransceiverstransceiversareintegratedcircuitsdesignedfor•MeetorExceedtheRequirementsofANSIbidirectionaldatacommunicationonmultipointbusStandardsTIA/EIA-422-BandTIA/EIA-485-Atransmissionlines.TheyaredesignedforbalancedandITURecommendationsV.11andX.27transmissionlinesandmeetANSIStandardsTIA/EIA-422-BandTIA/EIA-485-AandITU•DesignedforMultipointTransmissiononRecommendationsV.11andX.27.LongBusLinesinNoisyEnvironments•3-StateDriverandReceiverOutputsTheSN65176BandSN75176Bdevicescombinea3-statedifferentiallinedriverandadifferentialinputline•IndividualDriverandReceiverEnablesreceiver,bothofwhichoperatefromasingle5-V•WidePositiveandNegativeInput/OutputBuspowersupply.Thedriverandreceiverhaveactive-VoltageRangeshighandactive-lowenables,respectively,thatcanbe•±60-mAMaxDriverOutputCapabilityconnectedtogetherexternallytofunctionasadirectioncontrol.Thedriverdifferentialoutputsand•ThermalShutdownProtectionthereceiverdifferentialinputsareconnected•DriverPositiveandNegativeCurrentLimitinginternallytoformdifferentialinput/output(I/O)bus•12-kΩMinReceiverInputImpedanceportsthataredesignedtoofferminimumloadingtothebuswhenthedriverisdisabledorVCC=0.These•±200-mVReceiverInputSensitivityportsfeaturewidepositiveandnegativecommon-•50-mVTypReceiverInputHysteresismodevoltageranges,makingthedevicesuitablefor•OperateFromSingle5-VSupplyparty-lineapplications.Thedriverisdesignedforupto60mAofsinkorsourcecurrent.Thedriverfeaturespositiveandnegativecurrentlimitingandthermalshutdownforprotectionfromline-faultconditions.Thermalshutdownisdesignedtooccuratajunctiontemperatureofapproximately150°C.Thereceiverfeaturesaminimuminputimpedanceof12kΩ,aninputsensitivityof±200mV,andatypicalinputhysteresisof50mV.TheSN65176BandSN75176Bdevicescanbeusedintransmission-lineapplicationsemployingtheSN75172andSN75174quadrupledifferentiallinedriversandSN75173andSN75175quadrupledifferentiallinereceivers.SN65176BDORPPACKAGESN75176BD,P,ORPSPACKAGE(TOPVIEW)1Pleasebeawarethatanimportantnoticeconcerningavailability,standardwarranty,anduseincriticalapplicationsofTexasInstrumentssemiconductorproductsanddisclaimerstheretoappearsattheendofthisdatasheet.PRODUCTIONDATAinformationiscurrentasofpublicationdate.Copyright©1985–2014,TexasInstrumentsIncorporatedProductsconformtospecificationsperthetermsoftheTexasInstrumentsstandardwarranty.Productionprocessingdoesnotnecessarilyincludetestingofallparameters.DERER67312BABusD4SN65176B,SN75176BSLLS101E–JULY1985–REVISEDJANUARY2014(1)INPUTENABLEOUTPUTSDDEABHHHLLHLHXLZZ(1)H=highlevel,L=lowlevel,?=indeterminate,X=irrelevant,Z=highimpedance(off)Receiver(1)DIFFERENTIALENABLEOUTPUTINPUTSRERA–BVID≥0.2VLH–0.2VVID0.2VL?VID≤–0.2VLLXHZOpenL?(1)H=highlevel,L=lowlevel,?=indeterminate,X=irrelevant,Z=highimpedance(off)LogicDiagram(PositiveLogic)2SubmitDocumentationFeedbackCopyright©1985–2014,TexasInstrumentsIncorporatedProductFolderLinks:SN65176BSN75176BOutput85ΩNOMTYPICALOFRECEIVEROUTPUTInput/OutputPort960ΩNOM16.8kΩNOMTYPICALOFAANDBI/OPORTSDriverinput:R(eq)=3kΩNOMEnableinputs:R(eq)=8kΩNOMR(eq)=EquivalentResistorR(eq)VCCEQUIVALENTOFEACHINPUTVCCInput960ΩNOMVCCGNDSN65176B,SN75176B–JULY1985–REVISEDJANUARY2014SCHEMATICSOFINPUTSANDOUTPUTSXXXCopyright©1985–2014,TexasInstrumentsIncorporatedSubmitDocumentationFeedback3ProductFolderLinks:SN65176BSN75176BSN65176B,SN75176BSLLS101E–JULY1985–REVISEDJANUARY2014(unlessotherwisenoted)(1)MINMAXUNITVCCSupplyvoltage(2)7VVoltagerangeatanybusterminal–1015VVIEnableinputvoltage5.5VDpackage97θJAPackagethermalimpedance(3)(4)Ppackage85°C/WPSpackage95TJOperatingvirtualjunctiontemperature150°CLeadtemperature1,6mm(1/16inch)fromcasefor10seconds260°CTstgStoragetemperaturerange–65150°C(1)StressesbeyondthoselistedunderAbsoluteMaximumRatingsmaycausepermanentdamagetothedevice.Thesearestressratingsonly,andfunctionaloperationofthedeviceattheseoranyotherconditionsbeyondthoseindicatedunderRecommendedOperatingConditionsisnotimplied.Exposuretoabsolute-maximum-ratedconditionsforextendedperiodsmayaffectdevicereliability.(2)Allvoltagevalues,exceptdifferentialinput/outputbusvoltage,arewithrespecttonetworkgroundterminal.(3)MaximumpowerdissipationisafunctionofTJ(max),θJA,andTA.ThemaximumallowablepowerdissipationatanyallowableambienttemperatureisPD=(TJ(max)–TA)/θJA.OperatingattheabsolutemaximumTJof150°Ccanaff