Ultra Low Power Reset Generator

Abstract:Thisapplicationnotedescribesanultra-lowpowermicroprocessorresetgeneratorthatiscapableofoperatingfordecadesfromasingleAALithiumcell.Wherecontinuousintermittentresetisdesired,thisrelaxation-oscillatorcircuitcanprovideadjustablepulsewidthandresetperiod.Typicaloperationproducing100µspulseseachsecondrequiresonly1µAcurrentfroma1.8-5.5Vsupply.Formulasareprovidedforcalculationofcomponentvaluesforawiderangeofpulsewidthandperiod.Maxim>AppNotes>AMPLIFIERANDCOMPARATORCIRCUITSKeywords:microprocessorresetgenerator,ultra-lowpower,relaxationoscillator,longbatterylife,pulseSep06,2002generatorAPPLICATIONNOTE1186UltraLowPowerResetGeneratorAbstract:Thisapplicationnotedescribesanultra-lowpowermicroprocessorresetgeneratorthatiscapableofoperatingfordecadesfromasingleAALithiumcell.Wherecontinuousintermittentresetisdesired,thisrelaxation-oscillatorcircuitcanprovideadjustablepulsewidthandresetperiod.Typicaloperationproducing100spulseseachsecondrequiresonly1Acurrentfroma1.8-5.5Vsupply.Formulasareprovidedforcalculationofcomponentvaluesforawiderangeofpulsewidthandperiod.Whenaprocessor-controlleddevicemustbeguarantee