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1、ISO7240CF-Q1,ISO7240C-Q1ISO7241C-Q1,ISO7242C-Q1www.ti.comSLLSE40A–SEPTEMBER2010–REVISEDSEPTEMBER2011HIGH-SPEEDQUADDIGITALISOLATORSCheckforSamples:ISO7240CF-Q1,ISO7241C-Q11FEATURES•QualifiedforAutomotiveApplications•4kVESDProtection•SelectableFailsafeOutput(ISO7240C
2、F)•OperateWith3.3-Vor5-VSupplies•25and150-MbpsSignalingRateOptions•HighElectromagneticImmunity–LowChannel-to-ChannelOutputSkew;(seeapplicationreportSLLA181)1nsMax•–40°Cto125°COperatingRange–LowPulse-WidthDistortion(PWD);2nsMax–LowJitterContent;1nsTypat150Mbps•Typic
3、al25-YearLifeatRatedWorkingVoltage(seeapplicationnoteSLLA197andFigure17)•4000-VpeakIsolation,560-VpeakVIORM–UL1577,IEC60747-5-2(VDE0884,Rev2),IEC61010-1,IEC60950-1andCSAApprovedDESCRIPTIONTheISO7240,ISO7241andISO7242arequad-channeldigitalisolatorswithmultiplechanne
4、lconfigurationsandoutputenablefunctions.ThesedeviceshavelogicinputandoutputbuffersseparatedbyTI’ssilicondioxide(SiO2)isolationbarrier.Usedinconjunctionwithisolatedpowersupplies,thesedevicesblockhighvoltage,isolategrounds,andpreventnoisecurrentsfromenteringthelocalg
5、roundandinterferingwithordamagingsensitivecircuitry.TheISO7240hasallfourchannelsinthesamedirectionwhiletheISO7241hasthreechannelsthesamedirectionandonechannelinopposition.TheISO7242hastwochannelsineachdirection.TheCoptiondeviceshaveTTLinputthresholdsandanoise-filte
6、rattheinputthatpreventstransientpulsesfrombeingpassedtotheoutputofthedevice.TheMoptiondeviceshaveCMOSVCC/2inputthresholdsanddonothavetheinputnoise-filterortheadditionalpropagationdelay.TheISO7240CFhasaninputdisablefunctiononpin7,andaselectablehighorlowfailsafe-outp
7、utfunctionwiththeCTRLpin(pin10).Thefailsafe-outputisalogichighwhenalogic-highisplacedontheCTRLpinoritisleftunconnected.Ifalogic-lowsignalisappliedtotheCTRLpin,thefailsafe-outputbecomesalogic-lowoutputstate.TheISO7240CFinputdisablefunctionpreventsdatafrombeingpassed
8、acrosstheisolationbarriertotheoutput.Whentheinputsaredisabled,theoutputsaresetbytheCTRLpin.Thesedevicesmaybepoweredfromeither3.3-Vor5-Vsupplieson
