SN74AVC8T245_07中文资料

(TOPVIEW)123456789101112242322212019181716151413VCCADIRA1A2A3A4A5A6A7A8GNDGNDVCCBVCCBOEB1B2B3B4B5B6B7B8GNDRHLPACKAGE(TOPVIEW)124121323456789101123222120191817161514VCCBOEB1B2B3B4B5B6B7B8DIRA1A2A3A4A5A6A7A8GNDGNDVGNDCCBVCCADESCRIPTION/ORDERINGINFORMATIONSN74AVC8T2458-BITDUAL-SUPPLYBUSTRANSCEIVERWITHCONFIGURABLEVOLTAGETRANSLATIONAND3-STATEOUTPUTSSCES517H–DECEMBER2003–REVISEDFEBRUARY2007•ControlInputsVIH/VILLevelsAreReferenced•MaxDataRatestoVCCAVoltage–170Mbps(VCCA1.8VorVCCB1.8V)•VCCIsolationFeature–IfEitherVCCInputIsat–320Mbps(VCCA≥1.8VandVCCB≥1.8V)GND,AllI/OPortsAreintheHigh-Impedance•Latch-UpPerformanceExceeds100mAPerStateJESD78,ClassII•IoffSupportsPartialPower-Down-Mode•ESDProtectionExceedsJESD22Operation–8000-VHuman-BodyModel(A114-A)•FullyConfigurableDual-RailDesignAllows–200-VMachineModel(A115-A)EachPorttoOperateOvertheFull1.4-Vto–1000-VCharged-DeviceModel(C101)3.6-VPower-SupplyRange•I/OsAre4.6-VTolerantThis8-bitnoninvertingbustransceiverusestwoseparateconfigurablepower-supplyrails.TheSN74AVC8T245isoptimizedtooperatewithVCCA/VCCBsetat1.4Vto3.6V.ItisoperationalwithVCCA/VCCBaslowas1.2V.TheAportisdesignedtotrackVCCA.VCCAacceptsanysupplyvoltagefrom1.2Vto3.6V.TheBportisdesignedtotrackVCCB.VCCBacceptsanysupplyvoltagefrom1.2Vto3.6V.Thisallowsforuniversallow-voltagebidirectionaltranslationbetweenanyofthe1.2-V,1.5-V,1.8-V,2.5-V,and3.3-Vvoltagenodes.ORDERINGINFORMATIONTAPACKAGE(1)ORDERABLEPARTNUMBERTOP-SIDEMARKINGQFN–RHLReelof1000SN74AVC8T245RHLRWE245Tubeof60SN74AVC8T245PW–40°Cto85°CTSSOP–PWWE245Reelof2000SN74AVC8T245PWRTVSOP–DGVReelof2000SN74AVC8T245DGVRWE245(1)Forthemostcurrentpackageandorderinginformation,seethePackageOptionAddendumattheendofthisdocument,orseetheTIwebsiteat©2003–2007,TexasInstrumentsIncorporatedProductsconformtospecificationsperthetermsoftheTexasInstrumentsstandardwarranty.Productionprocessingdoesnotnecessarilyincludetestingofallparameters.(CONTINUED)DIROEA1B1ToSevenOtherChannels232221SN74AVC8T2458-BITDUAL-SUPPLYBUSTRANSCEIVERWITHCONFIGURABLEVOLTAGETRANSLATIONAND3-STATEOUTPUTSSCES517H–DECEMBER2003–REVISEDFEBRUARY2007TheSN74AVC8T245isdesignedforasynchronouscommunicationbetweendatabuses.ThedevicetransmitsdatafromtheAbustotheBbusorfromtheBbustotheAbus,dependingonthelogiclevelatthedirection-control(DIR)input.Theoutput-enable(OE)inputcanbeusedtodisabletheoutputssothebusesareeffectivelyisolated.TheSN74AVC8T245isdesignedsothecontrolpins(DIRandOE)aresuppliedbyVCCA.TheSN74AVC8T245solutioniscompatiblewithasingle-supplysystemandcanbereplacedlaterwitha'245function,withminimalprintedcircuitboardredesign.Thisdeviceisfullyspecifiedforpartial-power-downapplicationsusingIoff.TheIoffcircuitrydisablestheoutputs,preventingdamagingcurrentbackflowthroughthedevicewhenitispowereddown.TheVCCisolationfeatureensuresthatifeitherVCCinputisatGND,bothportsareinthehigh-impedancestate.Toensurethehigh-impedancestateduringpoweruporpowerdown,OEshallbetiedtoVCCthroughapullupresistor;theminimumvalueoftheresistorisdeterminedbythecurrent-sinkingcapabilityofthedriver.FUNCTIONTABLE(each8-bitsection)INPUTSOPERATIONOEDIRLLBdatatoAbusLHAdatatoBbusHXAlloutputsHi-ZLOGICDIAGRAM(POSITIVELOGIC)2SubmitDocumentationFeedback(1)SN74AVC8T2458-BITDUAL-SUPPLYBUSTRANSCEIVERWITHCONFIGURABLEVOLTAGETRANSLATIONAND3-STATEOUTPUTSSCES517H–DECEMBER2003–REVISEDFEBRUARY2007overoperatingfree-airtemperaturerange(unlessotherwisenoted)MINMAXUNITVCCASupplyvoltagerange–0.54.6VVCCBI/Oports(Aport)–0.54.6VIInputvoltagerange(2)I/Oports(Bport)–0.54.6VControlinputs–0.54.6Aport–0.54.6VoltagerangeappliedtoanyoutputVOVinthehigh-impedanceorpower-offstate(2)Bport–0.54.6Aport–0.5VCCA+0.5VOVoltagerangeappliedtoanyoutputinthehighorlowstate(2)(3)VBport–0.5VCCB+0.5IIKInputclampcurrentVI0–50mAIOKOutputclampcurrentVO0–50mAIOContinuousoutputcurrent±50mAContinuouscurrentthroughVCCA,VCCB,orGND±100mADGVpackage86θJAPackagethermalimpedance(4)PWpackage88°C/WRHLpackage43TstgStoragetemperaturerange–65150°C(1)Stressesbeyondthoselistedunderabsolutemaximumratingsmaycausepermanentdamagetothedevice.Thesearestressratingsonly,andfunctionaloperationofthedeviceattheseoranyotherconditionsbeyondthoseindicatedunderrecommendedoperatingconditionsisnotimplied.Exposuretoabsolute-maximum-ratedconditionsforextendedperiodsmayaffectdevicereliability.(2)Theinputvoltageandoutputnegative-voltageratingsmaybeexceedediftheinputandoutputcurrentratingsareobserved.(3)Theoutputpositive-voltageratingmaybeexceededupto4.6Vmaximumiftheoutputcurrentratingisobserved.(4)ThepackagethermalimpedanceiscalculatedinaccordancewithJESD51-7.3SubmitDocumentationFeedback(1)(2)(3)SN74AVC8T2458-BITDUAL-SUPPLYBUSTRANSCEIVERWITHCONFIGUR