SN75LBC184DR中文资料


 
 




SLLS236F−OCTOBER1996−REVISEDAPRIL20051POSTOFFICEBOX655303•DALLAS,TEXAS75265
IntegratedTransientVoltageSuppression
ESDProtectionforBusTerminalsExceeds:±30kVIEC61000-4-2,ContactDischarge±15kVIEC61000-4-2,Air-GapDischarge±15kVEIA/JEDECHumanBodyModel
CircuitDamageProtectionof400-WPeak(Typical)PerIEC61000-4-5
ControlledDriverOutput-VoltageSlewRatesAllowLongerCableStubLengths
250-kbpsinElectricallyNoisyEnvironments
Open-CircuitFail-SafeReceiverDesign
1/4UnitLoadAllowsfor128DevicesConnectedonBus
ThermalShutdownProtection
Power-Up/-DownGlitchProtection
EachTransceiverMeetsorExceedstheRequirementsofTIA/EIA-485(RS-485)andISO/IEC8482:1993(E)Standards
LowDisabledSupplyCurrent300µAMax
PinCompatibleWithSN75176
Applications:−IndustrialNetworks−UtilityMeters−MotorControldescriptionTheSN75LBC184andSN65LBC184arediffer-entialdatalinetransceiversinthetrade-standardfootprintoftheSN75176withbuilt-inprotectionagainsthigh-energynoisetransients.Thisfeatureprovidesasubstantialincreaseinreliabilityforbetterimmunitytonoisetransientscoupledtothedatacableovermostexistingdevices.Useofthesecircuitsprovidesareliablelow-costdirect-coupled(withnoisolationtransformer)datalineinterfacewithoutrequiringanyexternalcomponents.TheSN75LBC184andSN65LBC184canwith-standovervoltagetransientsof400-Wpeak(typical).TheconventionalcombinationwavecalledoutinIEC61000-4-5simulatestheovervoltagetransientandmodelsaunidirectionalsurgecausedbyovervoltagesfromswitchingandsecondarylightningtransients.Pleasebeawarethatanimportantnoticeconcerningavailability,standardwarranty,anduseincriticalapplicationsofTexasInstrumentssemiconductorproductsanddisclaimerstheretoappearsattheendofthisdatasheet.12348765RREDEDVCCBAGNDfunctionallogicdiagram(positivelogic)DERER67312BABusD4Figure1.SurgeWaveform—CombinationWave1.2µs50µsVt±VP±1/2VPSN65LBC184D(Markedas6LB184)SN75LBC184D(Markedas7LB184)SN65LBC184P(Markedas65LBC184)SN75LBC184P(Markedas75LBC184)(TOPVIEW)!#$%&'!!($#%)'*+&#$,#$(-!,'&$%&!$%)(&&#$%)(!$.($(!%(/#%%$!'($%%$#,#!,0#!!#$1-!,'&$)!&(%%2,(%$(&(%%#!+1&+',($(%$2#++)#!#($(!%-Copyright2002,TexasInstrumentsIncorporated
 
 




SLLS236F−OCTOBER1996−REVISEDAPRIL20052POSTOFFICEBOX655303•DALLAS,TEXAS75265description(continued)Abiexponentialfunctiondefinedbyseparateriseandfalltimesforvoltageandcurrentsimulatesthecombinationwave.Thestandard1.2µs/50µscombinationwaveformisshowninFigure1andinthetestdescriptioninFigure15.Thedevicealsoincludesadditionaldesirablefeaturesforparty-linedatabusesinelectricallynoisyenvironmentapplicationsincludingindustrialprocesscontrol.Thedifferential-driverdesignincorporatesslew-rate-controlledoutputssufficienttotransmitdataupto250kbps.Slew-ratecontrolallowslongerunterminatedcablerunsandlongerstublengthsfromthemainbackbonethanpossiblewithuncontrolledandfastervoltagetransitions.Auniquereceiverdesignprovidesafail-safeoutputofahighlevelwhentheinputsareleftfloating(opencircuit).TheSN75LBC184andSN65LBC184receiveralsoincludesahighinputresistanceequivalenttoone-fourthunitloadallowingconnectionofupto128similardevicesonthebus.TheSN75LBC184ischaracterizedforoperationfrom0°Cto70°C.TheSN65LBC184ischaracterizedfrom−40°Cto85°C.schematicofinputsandoutputsAPortOnly12µANominalAorBI/OBPortOnly12µANominal72kΩ16kΩ16kΩVCC
 
 




SLLS236F−OCTOBER1996−REVISEDAPRIL20053POSTOFFICEBOX655303•DALLAS,TEXAS75265DRIVERFUNCTIONTABLEINPUTENABLEOUTPUTSDDEABHHHLLHLHXLZZH=highlevel,L=lowlevel,?=indeterminate,X=irrelevant,Z=highimpedance(off)RECEIVERFUNCTIONTABLEDIFFERENTIALINPUTSENABLEOUTPUTA−BRERVID≥0.2VLH−0.2VVID0.2VL?VID≤−0.2VLLXHZOpenLHH=highlevel,L=lowlevel,?=indeterminate,X=irrelevant,Z=highimpedance(off)AVAILABLEOPTIONSPACKAGETAPLASTICSMALL-OUTLINE†(JEDECMS-012)PLASTICDUAL-IN-LINEPACKAGE(JEDECMS-001)0°Cto70°CSN75LBC184DSN75LBC184P−40°Cto85°CSN65LBC184DSN65LBC184P†AddRsuffixfortapedandreel.logicsymbol†REDE112BA76EN2EN1RD1423†ThissymbolisinaccordancewithANSI/IEEEStd91-1984andIECPublication617-12.
 
 




SLLS236F−OCTOBER1996−REVISEDAPRIL20054POSTOFFICEBOX655303•DALLAS,TEXAS75265absolutemaximumratingsoveroperatingfree−airtemperaturerange(unlessotherwisenoted)†Supplyvoltage,VCC(seeNote1)−0.5Vto7V....................................................Continuousvoltagerangeatanybusterminal−15Vto15V.........................................Datainput/outputvoltage−0.3Vto7V...........................................................Receiveroutputcurrent,IO±20mA...............................................................Electrostaticdischarge:Contactdischarge(IEC61000-4-2)A,B,GND(seeNote2)30kV...............Airdischarge(IEC61000-4-2)A,B,GND(seeNote2)15kV...............Humanbodymodel(seeNote3)A,B,GND(seeNote2)15kV...............Allpins3kV..............................Allter