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A1210,A1211,A1212,A1213,andA1214Continuous-TimeLatchFamilyReplacementDeviceCharacteristicsTableDeviceA121xCharacteristicsBOPBRPHysLegacyReplacementMinMaxMinMaxMinMaxUGN3177A121025150-150-2550-UGN3175A121115180-180-1580-A3187A121250175-175-50100350A3188A121380200-200-80160400A3185A1214140300-300-140280600FeaturesandBenefitsContinuous-timeoperation Fastpower-ontime LownoiseStableoperationoverfulloperatingtemperaturerangeReversebatteryprotectionSolid-statereliabilityFactory-programmedatend-of-lineforoptimumperformanceRobustEMCperformanceHighESDratingRegulatorstabilitywithoutabypasscapacitorDescriptionTheAllegro A1210-A1214Hall-effectlatchesarenextgenerationreplacementsforthepopularAllegro317xand318xlinesoflatchingswitches.TheA121xfamily,producedwithBiCMOStechnology,consistsofdevicesthatfeaturefastpower-ontimeandlow-noiseoperation.Deviceprogrammingisperformedafterpackaging,toensureincreasedswitchpointaccuracybyeliminatingoffsetsthatcanbeinducedbypackagestress.UniqueHallelementgeometriesandlow-offsetamplifiershelptominimizenoiseandtoreducetheresidualoffsetvoltagenormallycausedbydeviceovermolding,temperatureexcursions,andthermalstress.TheA1210-A1214Hall-effectlatchesincludethefollowingonasinglesiliconchip:voltageregulator,Hall-voltagegenerator,small-signalamplifier,Schmitttrigger,andNMOSoutputtransistor.Theintegratedvoltageregulatorpermitsoperationfrom3.8to24V.Theextensiveon-boardprotectioncircuitrymakespossiblea 30Vabsolutemaximumvoltageratingforsuperiorprotectioninautomotiveandindustrialmotorcommutationapplications,withoutaddingexternalcomponents.Alldevicesinthefamilyareidenticalexceptformagneticswitchpointlevels.ThesmallgeometriesoftheBiCMOSprocessallowthesedevicestobeprovidedinultrasmallpackages.Thepackagestylesavailableprovidemagneticallyoptimizedsolutionsformostapplications.PackageLHisanSOT23W,aminiaturelow-profilesurface-mountpackage,whilepackageUAisathree-leadultraminiSIPforthrough-holemounting.Eachpackageislead(Pb)free,with100%mattetinplatedleadframes.FunctionalBlockDiagram