MAX485CSA+中文资料

Forpricing,delivery,andorderinginformation,pleasecontactMaxim/DallasDirect!at1-888-629-4642,orvisitMaxim’swebsiteat–MAX491,andMAX1487arelow-powertransceiversforRS-485andRS-422communication.Eachpartcontainsonedriverandonereceiver.TheMAX483,MAX487,MAX488,andMAX489featurereducedslew-ratedriversthatminimizeEMIandreducereflectionscausedbyimproperlyterminatedcables,thusallowingerror-freedatatransmissionupto250kbps.ThedriverslewratesoftheMAX481,MAX485,MAX490,MAX491,andMAX1487arenotlimited,allowingthemtotransmitupto2.5Mbps.Thesetransceiversdrawbetween120µAand500µAofsupplycurrentwhenunloadedorfullyloadedwithdisableddrivers.Additionally,theMAX481,MAX483,andMAX487havealow-currentshutdownmodeinwhichtheyconsumeonly0.1µA.Allpartsoperatefromasingle5Vsupply.Driversareshort-circuitcurrentlimitedandareprotectedagainstexcessivepowerdissipationbythermalshutdowncircuitrythatplacesthedriveroutputsintoahigh-imped-ancestate.Thereceiverinputhasafail-safefeaturethatguaranteesalogic-highoutputiftheinputisopencircuit.TheMAX487andMAX1487featurequarter-unit-loadreceiverinputimpedance,allowingupto128MAX487/MAX1487transceiversonthebus.Full-duplexcommuni-cationsareobtainedusingtheMAX488–MAX491,whiletheMAX481,MAX483,MAX485,MAX487,andMAX1487aredesignedforhalf-duplexapplications.________________________ApplicationsLow-PowerRS-485TransceiversLow-PowerRS-422TransceiversLevelTranslatorsTransceiversforEMI-SensitiveApplicationsIndustrial-ControlLocalAreaNetworks__NextGenerationDeviceFeatures♦ForFault-TolerantApplicationsMAX3430:±80VFault-Protected,Fail-Safe,1/4UnitLoad,+3.3V,RS-485TransceiverMAX3440E–MAX3444E:±15kVESD-Protected,±60VFault-Protected,10Mbps,Fail-Safe,RS-485/J1708Transceivers♦ForSpace-ConstrainedApplicationsMAX3460–MAX3464:+5V,Fail-Safe,20Mbps,ProfibusRS-485/RS-422TransceiversMAX3362:+3.3V,High-Speed,RS-485/RS-422TransceiverinaSOT23PackageMAX3280E–MAX3284E:±15kVESD-Protected,52Mbps,+3Vto+5.5V,SOT23,RS-485/RS-422,TrueFail-SafeReceiversMAX3293/MAX3294/MAX3295:20Mbps,+3.3V,SOT23,RS-855/RS-422Transmitters♦ForMultipleTransceiverApplicationsMAX3030E–MAX3033E:±15kVESD-Protected,+3.3V,QuadRS-422Transmitters♦ForFail-SafeApplicationsMAX3080–MAX3089:Fail-Safe,High-Speed(10Mbps),Slew-Rate-LimitedRS-485/RS-422Transceivers♦ForLow-VoltageApplicationsMAX3483E/MAX3485E/MAX3486E/MAX3488E/MAX3490E/MAX3491E:+3.3VPowered,±15kVESD-Protected,12Mbps,Slew-Rate-Limited,TrueRS-485/RS-422TransceiversMAX481/MAX483/MAX485/MAX487–MAX491/MAX1487Low-Power,Slew-Rate-LimitedRS-485/RS-422Transceivers________________________________________________________________MaximIntegratedProducts1______________________________________________________________SelectionTable19-0122;Rev8;10/03MAX481MAX483MAX485MAX487MAX488MAX489MAX490MAX491MAX1487PARTNUMBERHALF/FULLDUPLEXDATARATE(Mbps)SLEW-RATELIMITEDLOW-POWERSHUTDOWNRECEIVER/DRIVERENABLEQUIESCENTCURRENT(µA)NUMBEROFTRANSMITTERSONBUSPINCOUNTHalfHalfHalfHalfFullFullFullFullHalf2.50.252.50.250.250.252.52.52.5NoYesNoYesYesYesNoNoNoYesYesNoYesNoNoNoNoNoYesYesYesYesNoYesNoYesYes3001203001201201203003002303232321283232323212888888148148OrderingInformationappearsatendofdatasheet.MAX481/MAX483/MAX485/MAX487–MAX491/MAX1487Low-Power,Slew-Rate-LimitedRS-485/RS-422Transceivers2_______________________________________________________________________________________ABSOLUTEMAXIMUMRATINGSSupplyVoltage(VCC).............................................................12VControlInputVoltage(RE,DE)...................-0.5Vto(VCC+0.5V)DriverInputVoltage(DI).............................-0.5Vto(VCC+0.5V)DriverOutputVoltage(A,B)...................................-8Vto+12.5VReceiverInputVoltage(A,B).................................-8Vto+12.5VReceiverOutputVoltage(RO).....................-0.5Vto(VCC+0.5V)ContinuousPowerDissipation(TA=+70°C)8-PinPlasticDIP(derate9.09mW/°Cabove+70°C)....727mW14-PinPlasticDIP(derate10.00mW/°Cabove+70°C)..800mW8-PinSO(derate5.88mW/°Cabove+70°C).................471mW14-PinSO(derate8.33mW/°Cabove+70°C)...............667mW8-PinµMAX(derate4.1mW/°Cabove+70°C)..............830mW8-PinCERDIP(derate8.00mW/°Cabove+70°C).........640mW14-PinCERDIP(derate9.09mW/°Cabove+70°C).......727mWOperatingTemperatureRangesMAX4__C__/MAX1487C_A...............................0°Cto+70°CMAX4__E__/MAX1487E_A.............................-40°Cto+85°CMAX4__MJ_/MAX1487MJA...........................-55°Cto+125°CStorageTemperatureRange.............................-65°Cto+160°CLeadTemperature(soldering,10sec).............................+300°CDCELECTRICALCHARACTERISTICS(VCC=5V±5%,TA=TMINtoTMAX,unlessotherwisenoted.)(Notes1,2)Stressesbeyondthoselistedunder“AbsoluteMaximumRatings”maycausepermanentdamagetothedevice.Thesearestressratingsonly,andfunctionaloperationofthedeviceattheseoranyotherconditionsbeyondthoseindicatedintheoperationalsectionsofthespecificationsisnotimplied.Exposuretoabsolutemaximumratingconditionsforextendedperiodsmayaffectdevicereliability.VVIN=-7VVIN=12VVIN=-7VVIN=12VInputCurrent(A,B)IIN2