ISL1208.pdf

ISL1208.pdf

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1FN8085.3ISL1208I2CRealTimeClock/CalendarLowPowerRTCwithBatteryBackedSRAMTheISL1208deviceisalowpowerrealtimeclockwithtimingandcrystalcompensation,clock/calendar,powerfailindicator,periodicorpolledalarm,intelligentbatterybackupswitchingandbattery-backeduserSRAM.Theoscillatorusesanexternal,low-cost32.768kHzcrystal.Therealtimeclocktrackstimewithseparateregistersforhours,minutes,andseconds.Thedevicehascalendarregistersfordate,month,yearanddayoftheweek.Thecalendarisaccuratethrough2099,withautomaticleapyearcorrection.PinoutISL1208（8-PINMSOP,SOIC）TOPVIEWFeaturesRealTimeClock/Calendar-TracksTimeinHours,Minutes,andSeconds-DayoftheWeek,Day,Month,andYear15SelectableFrequencyOutputsSingleAlarm-SettabletotheSecond,Minute,Hour,DayoftheWeek,Day,orMonth-SingleEventorPulseInterruptModeAutomaticBackuptoBatteryorSuperCapPowerFailureDetectionOn-ChipOscillatorCompensation2BytesBattery-BackedUserSRAMI2CInterface-400kHzDataTransferRate400nABatterySupplyCurrentSamePinOutasSTM41TxxandMaximDS13xxDevicesSmallPackageOptions-8LdMSOPandSOICPackagesPb-FreePlusAnnealAvailable（RoHSCompliant）ApplicationsUtilityMetersHVACEquipmentAudio/VideoComponentsSetTopBox/TelevisionModemsNetworkRouters,Hubs,Switches,BridgesCellularInfrastructureEquipmentFixedBroadbandWirelessEquipmentPagers/PDAPOSEquipmentTestMeters/FixturesOfficeAutomation（Copiers,Fax）HomeAppliancesComputerProductsOtherIndustrial/Medical/AutomotiveOrderingInformationPARTNUMBERMARKINGVDDRANGETEMP.RANGE（C）PACKAGEISL1208IU8AGSYWW2.7Vto5.5V-40to+858LdMSOPISL1208IU8-TKAGSYWW2.7Vto5.5V-40to+858LdMSOPTapeandReelISL1208IU8Z（SeeNote）ANWYWW2.7Vto5.5V-40to+858LdMSOP（Pb-free）ISL1208IU8Z-TK（SeeNote）ANWYWW2.7Vto5.5V-40to+858LdMSOPTapeandReel（Pb-free）ISL1208IB81208YWW2.7Vto5.5V-40to+858LdSOICISL1208IB8-TK1208YWW2.7Vto5.5V-40to+858LdSOICTapeandReelISL1208IB8Z（SeeNote）1208YWWZ2.7Vto5.5V-40to+858LdSOIC（Pb-free）ISL1208IB8Z-TK（SeeNote）1208YWWZ2.7Vto5.5V-40to+858LdSOICTapeandReel（Pb-free）NOTE:

IntersilPb-freeplusannealproductsemployspecialPb-freematerialsets;moldingcompounds/dieattachmaterialsand100%mattetinplateterminationfinish,whichareRoHScompliantandcompatiblewithbothSnPbandPb-freesolderingoperations.IntersilPb-freeproductsareMSLclassifiedatPb-freepeakreflowtemperaturesthatmeetorexceedthePb-freerequirementsofIPC/JEDECJSTD-020.*ContactFactoryforavailability.123487X1X2VBATVDDIRQ/FOUTSCLSDAGND56DataSheetJuly29,2005CAUTION:

Thesedevicesaresensitivetoelectrostaticdischarge;followproperICHandlingProcedures.1-888-INTERSILor1-888-468-3774|Intersil（anddesign）isaregisteredtrademarkofIntersilAmericasInc.CopyrightIntersilAmericasInc.2004,2005.AllRightsReservedAllothertrademarksmentionedarethepropertyoftheirrespectiveowners.2FN8085.3July29,2005BlockDiagramI2CINTERFACERTCCONTROLLOGICALARMFREQUENCYOUTRTCDIVIDERSDABUFFERCRYSTALOSCILLATORPORSWITCHSCLBUFFERSDASCLX1X2VDDVBATIRQ/FOUTINTERNALSUPPLYVTRIPSecondsMinutesHoursDayofWeekDateMonthYearUSERSRAMCONTROLREGISTERSPinDescriptionsPINNUMBERSYMBOLDESCRIPTION1X1TheX1pinistheinputofaninvertingamplifierandisintendedtobeconnectedtoonepinofanexternal32.768kHzquartzcrystal.X1canalsobedrivendirectlyfroma32.768kHzsource.2X2TheX2pinistheoutputofaninvertingamplifierandisintendedtobeconnectedtoonepinofanexternal32.768kHzquartzcrystal.3VBATThisinputprovidesabackupsupplyvoltagetothedevice.VBATsuppliespowertothedeviceintheeventthattheVDDsupplyfails.Thispinshouldbetiedtogroundifnotused.4GNDGround.5SDASerialData（SDA）isabidirectionalpinusedtotransferserialdataintoandoutofthedevice.IthasanopendrainoutputandmaybewireORedwithotheropendrainoropencollectoroutputs.6SCLTheSerialClock（SCL）inputisusedtoclockallserialdataintoandoutofthedevice.7IRQ/FOUTInterruptOutput/FrequencyOutputisamulti-functionalpinthatcanbeusedasinterruptorfrequencyoutputpin.Thefunctionissetviatheconfigurationregister.8VDDPowersupply.ISL12083FN8085.3July29,2005AbsoluteMaximumRatingsVoltageonVDD,VBAT,SCL,SDA,andIRQpins（respecttoground）.-0.5Vto7.0VVoltageonX1andX2pins（respecttoground）.-0.5VtoVDD+0.5（VDDMode）-0.5VtoVBAT+0.5（VBATMode）StorageTemperature.-65Cto+150CLeadTemperature（Soldering,10s）.300CCAUTION:

Stressesabovethoselistedin“AbsoluteMaximumRatings”maycausepermanentdamagetothedevice.Thisisastressonlyratingandoperationofthedeviceattheseoranyotherconditionsabovethoseindicatedintheoperationalsectionsofthisspecificationisnotimplied.DCOperatingCharacteristicsRTCTemperature=-40Cto+85C,unlessotherwisestated.SYMBOLPARAMETERCONDITIONSMINTYP（Note4）MAXUNITSNOTESVDDMainPower