ProductFolderSample&BuyTechnicalDocumentsTools&SoftwareSupport&CommunityReferenceDesign1FeaturesISO1540,ISO1541SLLSEB6D–JULY2012–REVISEDDECEMBER2016ISO154xLow-PowerBidirectionalI2CIsolators3Description•IsolatedBidirectional,I2CCompatible,Communication•Supportsupto1-MHzOperation•3-Vto5.5-VSupplyRange•Open-DrainOutputsWith3.5-mASide1and35-mASide2SinkCurrentCapability•–40°Cto+125°COperatingTemperature•±50-kV/µsTransientImmunity(Typical)•HBMESDProtectionof4kVonAllPins;8kVonBusPins•Safety-RelatedCertifications:–4242-VPKIsolationperDINVVDEV0884-10(VDEV0884-10):2006-12–2500-VRMSIsolationfor1MinuteperUL1577–CSAComponentAcceptanceNotice5A,IEC60950-1andIEC61010-1EndEquipmentStandards–CQCBasicInsulationperGB4943.1-20112Applications•IsolatedI2CBuses•SMBusandPMBusInterfaces•Open-DrainNetworks•MotorControlSystems•BatteryManagement•I2CLevelShiftingTheISO1540andISO1541devicesarelow-power,bidirectionalisolatorsthatarecompatiblewithI2Cinterfaces.ThesedeviceshavelogicinputandoutputbuffersthatareseparatedbyTexasInstrumentsCapacitiveIsolationtechnologyusingasilicondioxide(SiO2)barrier.Whenusedwithisolatedpowersupplies,thesedevicesblockhighvoltages,isolategrounds,andpreventnoisecurrentsfromenteringthelocalgroundandinterferingwithordamagingsensitivecircuitry.Thisisolationtechnologyprovidesforfunction,performance,size,andpowerconsumptionadvantageswhencomparedtooptocouplers.TheISO1540andISO1541devicesenableacompleteisolatedI2Cinterfacetobeimplementedwithinasmallformfactor.TheISO1540hastwoisolatedbidirectionalchannelsforclockanddatalineswhiletheISO1541hasabidirectionaldataandaunidirectionalclockchannel.TheISO1541isusefulinapplicationsthathaveasinglemasterwhiletheISO1540issuitableformulti-masterapplications.Forapplicationswhereclockstretchingbytheslaveispossible,theISO1540deviceshouldbeused.Isolatedbidirectionalcommunicationisaccomplishedwithinthesedevicesbyoffsettingthelow-leveloutputvoltageonside1toavaluegreaterthanthehigh-levelinputvoltageonside1,thuspreventinganinternallogiclatchthatotherwisewouldoccurwithstandarddigitalisolators.DeviceInformation(1)PARTNUMBERPACKAGEBODYSIZE(NOM)ISO1540ISO1541SOIC(8)4.90mm×3.91mm(1)Forallavailablepackages,seetheorderableaddendumattheendofthedatasheet.SimplifiedSchematicAnIMPORTANTNOTICEattheendofthisdatasheetaddressesavailability,warranty,changes,useinsafety-criticalapplications,intellectualpropertymattersandotherimportantdisclaimers.PRODUCTIONDATA.IsolationCapacitorVREFGND1SDA1orSCL1VCC1GND2SDA2orSCL2VCC2ISO1540,ISO1541SLLSEB6D–JULY2012–REVISEDDECEMBER2016www.ti.com2SubmitDocumentationFeedbackCopyright©2012–2016,TexasInstrumentsIncorporatedProductFolderLinks:ISO1540ISO1541TableofContents1Features....................................................................12Applications...............................................................13Description.................................................................14RevisionHistory........................................................25PinConfigurationandFunctions...............................46Specifications............................................................56.1AbsoluteMaximumRatings.......................................56.2ESDRatings..............................................................66.3RecommendedOperatingConditions........................66.4ThermalIn...
