集成电路DS12CR887-5

型号	DS12CR887-5	厂家	DALLAS/MAXIM
封装	EDIP24	批号	0715

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TheDS12R885isafunctionaldrop-inreplacementfor
theDS12885real-timeclock(RTC).Thedeviceprovides
anRTC/calendar,onetime-of-dayalarm,three
maskableinterruptswithacommoninterruptoutput,a
programmablesquarewave,and114bytesofbatterybacked
staticRAM.Thedateattheendofthemonthis
automaticallyadjustedformonthswithfewerthan31
days,includingcorrectionforleapyears.Italsooperates
ineither24-houror12-hourformatwithanAM/PM
indicator.Aprecisiontemperature-compensatedcircuit
monitorsthestatusofVCC.Ifaprimarypowerfailureis
detected,thedeviceautomaticallyswitchestoabackup
supply.TheVBACKUPpinsupportsarechargeable
batteryorasupercapandincludesanintegrated,
alwaysenabledtricklecharger.TheDS12R885is
accessedthroughamultiplexedbyte-wideinterface,

DS12CR887andDS12R887integratetheDS12R885
diewithacrystalandbattery.