MAX3485EESA中文资料

GeneralDescriptionDevicesintheMAX3483Efamily(MAX3483E/MAX3485E/MAX3486E/MAX3488E/MAX3490E/MAX3491E)are±15kVESD-protected,+3.3V,low-powertransceiversforRS-485andRS-422communications.Eachdevicecon-tainsonedriverandonereceiver.TheMAX3483EandMAX3488Efeatureslew-rate-limiteddriversthatminimizeEMIandreducereflectionscausedbyimproperlytermi-natedcables,allowingerror-freedatatransmissionatdataratesupto250kbps.Thepartiallyslew-rate-limitedMAX3486Etransmitsupto2.5Mbps.TheMAX3485E,MAX3490E,andMAX3491Etransmitatupto12Mbps.Alldevicesfeatureenhancedelectrostaticdischarge(ESD)protection.Alltransmitteroutputsandreceiverinputsareprotectedto±15kVusingIEC1000-4-2Air-GapDischarge,±8kVusingIEC1000-4-2ContactDischarge,and±15kVusingtheHumanBodyModel.Driversareshort-circuitcurrentlimitedandareprotect-edagainstexcessivepowerdissipationbythermalshutdowncircuitrythatplacesthedriveroutputsintoahigh-impedancestate.Thereceiverinputhasafail-safefeaturethatguaranteesalogic-highoutputifbothinputsareopencircuit.TheMAX3488E,MAX3490E,andMAX3491Efeaturefull-duplexcommunication,whiletheMAX3483E,MAX3485E,andMAX3486Earedesignedforhalf-duplexcommunication.ApplicationsTelecommunicationsIndustrial-ControlLocalAreaNetworksTransceiversforEMI-SensitiveApplicationsIntegratedServicesDigitalNetworksPacketSwitchingFeatures'ESDProtectionforRS-485I/OPins±15kV—HumanBodyModel±8kV—IEC1000-4-2,ContactDischarge±15kV—IEC1000-4-2,Air-GapDischarge'OperatefromaSingle+3.3VSupply—NoChargePumpRequired'Interoperablewith+5VLogic'Guaranteed12MbpsDataRate(MAX3485E/MAX3490E/MAX3491E)'Slew-RateLimitedforErrorlessDataTransmission(MAX3483E/MAX3488E)'2nALow-CurrentShutdownMode(MAX3483E/MAX3485E/MAX3486E/MAX3491E)'-7Vto+12VCommon-ModeInputVoltageRange'Full-DuplexandHalf-DuplexVersionsAvailable'Industry-Standard75176Pinout(MAX3483E/MAX3485E/MAX3486E)'Current-LimitingandThermalShutdownforDriverOverloadProtectionMAX3483E/MAX3485E/MAX3486E/MAX3488E/MAX3490E/MAX3491E3.3V-Powered,±15kVESD-Protected,12MbpsandSlew-Rate-LimitedTrueRS-485/RS-422Transceivers________________________________________________________________MaximIntegratedProducts119-1474;Rev0;4/99PARTMAX3483ECSAMAX3483ECPA0°Cto+70°C0°Cto+70°CTEMP.RANGEPIN-PACKAGE8SO8PlasticDIPPARTNUMBERGUARANTEEDDATARATE(Mbps)SUPPLYVOLTAGE(V)HALF/FULLDUPLEXSLEW-RATELIMITEDDRIVER/RECEIVERENABLESHUTDOWNCURRENT(nA)PINCOUNTMAX3483E0.25HalfYesYes28MAX3485E12HalfNoYes28MAX3486E2.5HalfYesYes28MAX3488E0.25FullYesNo—8MAX3490E12FullNoNo—8MAX3491E123.0to3.6FullNoYes214SelectorGuideMAX3483EESAMAX3483EEPA-40°Cto+85°C-40°Cto+85°C8SO8PlasticDIPMAX3485ECSAMAX3485ECPA0°Cto+70°C0°Cto+70°C8SO8PlasticDIPMAX3485EESAMAX3485EEPA-40°Cto+85°C-40°Cto+85°C8SO8PlasticDIPOrderingInformationOrderingInformationcontinuedatendofdatasheet.±15kVESDPROTECTIONYesYesYesYesYesYesForfreesamples&thelatestliterature:±15kVESD-Protected,12MbpsandSlew-Rate-LimitedTrueRS-485/RS-422Transceivers2_______________________________________________________________________________________ABSOLUTEMAXIMUMRATINGSDCELECTRICALCHARACTERISTICS(VCC=+3.3V±0.3V,TA=TMINtoTMAX,unlessotherwisenoted.TypicalvaluesareatTA=+25°C.)Stressesbeyondthoselistedunder“AbsoluteMaximumRatings”maycausepermanentdamagetothedevice.Thesearestressratingsonly,andfunctionaloperationofthedeviceattheseoranyotherconditionsbeyondthoseindicatedintheoperationalsectionsofthespecificationsisnotimplied.Exposuretoabsolutemaximumratingconditionsforextendedperiodsmayaffectdevicereliability.SupplyVoltage(VCC).............................................................+7VControlInputVoltage(RE,DE).................................-0.3Vto+7VDriverInputVoltage(DI)...........................................-0.3Vto+7VDriverOutputVoltage(A,B,Y,Z).......................-7.5Vto+12.5VReceiverInputVoltage(A,B)..............................-7.5Vto+12.5VReceiverOutputVoltage(RO)....................-0.3Vto(VCC+0.3V)ContinuousPowerDissipation(TA=+70°C)8-PinSO(derate5.88mW/°Cabove+70°C)..................471mW8-PinPlasticDIP(derate9.09mW/°Cabove+70°C).....727mW14-PinSO(derate8.33mW/°Cabove+70°C)................667mW14-PinPlasticDIP(derate10mW/°Cabove+70°C)......800mWOperatingTemperatureRangesMAX34__EC__...................................................0°Cto+70°CMAX34__EE__.................................................-40°Cto+85°CStorageTemperatureRange.............................-65°Cto+150°CLeadTemperature(soldering,10sec).............................+300°CDE=0,VCC=0or3.6VDE=0,RE=VCC,VCC=0or3.6V,MAX3491EDE=0,RE=0,VCC=0or3.6V,MAX3491EkΩ12RINReceiverInputResistanceµA±1IOZRThree-State(High-Impedance)OutputCurrentatReceiverV0.4VOLReceiverOutputLowVoltageVVCC-0.4VOHReceiverOutputHighVoltagemV50ΔVTHReceiverInputHysteresisV-0.20.2VTHReceiverDifferentialThresholdVoltageµA-1IOOutputLeakage(Y,Z)inShutdownMode1µA-20IOOutputLeakage(Y,Z)V0.2ΔVODChangeinMagnitudeofDriverDifferentialOutputVoltageforComplementaryOutputStates(