TPS3823中文资料

TPS3820-xx,TPS3823-xx,TPS3824-xx,TPS3825-xx,TPS3828-xxPROCESSORSUPERVISORYCIRCUITSSLVS165B–APRIL1998–REVISEDMAY19991POSTOFFICEBOX655303•DALLAS,TEXAS75265Power-OnResetGeneratorWithFixedDelayTimeof200ms(TPS3823/4/5/8)or25ms(TPS3820)ManualResetInput(TPS3820/3/5/8)Push/PullReset(TPS3820/3/4/5),Reset(TPS3824),orOpen-DrainOutputs(TPS3828)SupplyVoltageSupervisionRange2.5V,3V,3.3V,5VWatchdogTimer(TPS3820/3/4/8)SupplyCurrentof15μA(Typ)SOT23-5PackageTemperatureRange...–40°Cto85°CdescriptionTheTPS382xfamilyofsupervisorsprovidescircuitinitializationandtimingsupervision,primarilyforDSPandprocessor-basedsystems.Duringpower-on,RESETisassertedwhensupplyvoltageVDDbecomeshigherthan1.1V.Thereafter,thesupplyvoltagesupervisormoni-torsVDDandkeepsRESETactiveaslongasVDDremainsbelowthethresholdvoltageVIT–.Aninternaltimerdelaysthereturnoftheoutputtotheinactivestate(high)toensurepropersystemreset.Thedelaytime,td,startsafterVDDhasrisenabovethethresholdvoltageVIT–.WhenthesupplyvoltagedropsbelowthethresholdvoltageVIT–,theoutputbecomesactive(low)again.Noexternalcomponentsarerequired.Allthedevicesofthisfamilyhaveafixed-sensethresholdvoltageVIT–setbyaninternalvoltagedivider.RESETMRWDI100nFVDDGNDTPS3823-33VDDRESETI/OGNDMSP430C3253.3VtypicalapplicationApplicationsUsingDSPs,Microcontrollers,orMicroprocessorsIndustrialEquipmentProgrammableControlsAutomotiveSystemsPortable/Battery-PoweredEquipmentIntelligentInstrumentsWirelessCommunicationsSystemsNotebook/DesktopComputersPleasebeawarethatanimportantnoticeconcerningavailability,standardwarranty,anduseincriticalapplicationsofTexasInstrumentssemiconductorproductsanddisclaimerstheretoappearsattheendofthisdatasheet.Copyright1999,TexasInstrumentsIncorporatedPRODUCTIONDATAinformationiscurrentasofpublicationdate.ProductsconformtospecificationsperthetermsofTexasInstrumentsstandardwarranty.Productionprocessingdoesnotnecessarilyincludetestingofallparameters.3245TPS3820†,TPS3823,TPS3828†DBVPACKAGE(TOPVIEW)1RESETGNDMRVDDWDI3245TPS3825†...DBVPACKAGE(TOPVIEW)1RESETGNDRESETVDDMR3245TPS3824...DBVPACKAGE(TOPVIEW)1RESETGNDRESETVDDWDI†ThisdeviceisintheProductPreviewstageofdevelopment.ContactthelocalTIsalesofficeforavailabilityTPS3820-xx,TPS3823-xx,TPS3824-xx,TPS3825-xx,TPS3828-xxPROCESSORSUPERVISORYCIRCUITSSLVS165B–APRIL1998–REVISEDMAY19992POSTOFFICEBOX655303•DALLAS,TEXAS75265description(continued)TheTPS3820/3/5/8devicesincorporateamanualresetinput,MR.AlowlevelatMRcausesRESETtobecomeactive.TheTPS3824/5devicesincludeahigh-leveloutputRESET.TPS3820/3/4/8haveawatchdogtimerthatisperiodicallytriggeredbyapositiveornegativetransitionatWDI.Whenthesupervisingsystemfailstoretriggerthewatchdogcircuitwithinthetime-outinterval,ttout,RESETbecomesactiveforthetimeperiodtd.Thiseventalsoreinitializesthewatchdogtimer.LeavingWDIunconnecteddisablesthewatchdog.Theproductspectrumisdesignedforsupplyvoltagesof2.5V,3V,3.3V,and5V.Thecircuitsareavailableina5-pinSOT23-5package.TheTPS382xdevicesarecharacterizedforoperationoveratemperaturerangeof-40°Cto85°C.PACKAGEINFORMATIONDEVICENAMETHRESHOLDVOLTAGEMARKINGTPS3820-25DBVR†2.25VTPS3820-30DBVR†2.63VTPS3820-33DBVR†2.93VPDEITPS3820-50DBVR†4.55VPDDITPS3823-25DBVR2.25VPAPITPS3823-30DBVR2.63VPAQITPS3823-33DBVR2.93VPARITPS3823-50DBVR4.55VPASITPS3824-25DBVR2.25VPATITPS3824-30DBVR2.63VPAUITPS3824-33DBVR2.93VPAVITPS3824-50DBVR4.55VPAWITPS3825-25DBVR†2.25VTPS3825-30DBVR†2.63VTPS3825-33DBVR†2.93VPDGITPS3825-50DBVR†4.55VPDFITPS3828-25DBVR†2.25VTPS3828-30DBVR†2.63VTPS3828-33DBVR†2.93VPDIITPS3828-50DBVR†4.55VPDHI†ThisdeviceisintheProductPreviewstageofdevelopment.ContactthelocalTIsalesofficeforavailabilityTPS3820-xx,TPS3823-xx,TPS3824-xx,TPS3825-xx,TPS3828-xxPROCESSORSUPERVISORYCIRCUITSSLVS165B–APRIL1998–REVISEDMAY19993POSTOFFICEBOX655303•DALLAS,TEXAS75265FUNCTION/TRUTHTABLEINPUTSOUTPUTSMR‡VDDVITRESETRESET†L0LHL1LHH0LHH1HL†TPS3824/5‡TPS3820/3/5/8functionalblockdiagram_+WatchdogTimerLogicResetLogicReset†ResetMR‡WDITransitionDetector52kΩ40kΩVrefVDD†TPS3824/5‡TPS3820/3/5/8timingdiagramundefinedundefinedtdtdtt(out)tdXXXXVDDVIT1.1VRESETWDIX=Don’tcareTPS3820-xx,TPS3823-xx,TPS3824-xx,TPS3825-xx,TPS3828-xxPROCESSORSUPERVISORYCIRCUITSSLVS165B–APRIL1998–REVISEDMAY19994POSTOFFICEBOX655303•DALLAS,TEXAS75265absolutemaximumratingsoveroperatingfree-airtemperaturerange(unlessotherwisenoted)†Supplyvoltage,VDD(seeNote1)6V.............................................................Inputvoltage,MR,WDI(seeNote1)–0.3Vto(VDD+0.3V)........................................Maximumlowoutputcurrent,IOL5mA...........................................................Maximumhighoutputcurrent,IOH–5mA.........................................................Inputclampcurrentrange,IIK(VI0orVIVDD)±10mA..........................................Outputclampcurrentrange,IOK(VO0orVOVDD)±10mA......................................ContinuoustotalpowerdissipationSeeDissipationRatingTable.....................................Operatingfree-airtemperaturerange,TA–40°Cto85°C............................................Storagetemperaturerange,