MM58274CN ,Microprocessor Compatible Real Time ClockMM58274CMicroprocessorCompatibleRealTimeClockApril1991MM58274CMicroprocessorCompatibleRealTimeClock ..
MM58341N ,High Voltage Display DriverFeaturesYDirect interface to high voltage displayThe MM58341 is a monolithic MOS integrated circuit ..
MM58341N ,High Voltage Display DriverApplicationsYDisplay blanking control inputY TMCOPS or microprocessor-driven displaysYSimple to cas ..
MM58341N ,High Voltage Display DriverApplicationsYDisplay blanking control inputY TMCOPS or microprocessor-driven displaysYSimple to cas ..
MM58341V ,High Voltage Display DriverMM58341HighVoltageDisplayDriverMarch1991MM58341HighVoltageDisplayDriverGeneralDescription
MM58342N ,High Voltage Display DriverElectrical Characteristics T = −40˚C to +85˚C, V =5V 0.5V, V = 0V unless otherwise specifiedA DD SS ..
MN1959041 ,For Information稢ommunicationFeatures•General-purpose DSP core (MP: Main Processor) that can implement complex processing flexib ..
MN1A7T0200 ,MicrocomputerMN1A7T0200Type MN1A7T0200Max. 16 M in totalROM (× × × × ×8-bit / × × × × ×16-bit / × × × × ×32-bit) ..
MN2488 , MOLD TYPE SILICON POWER TRANSISTOR
MN2488 , MOLD TYPE SILICON POWER TRANSISTOR
MN3003 ,High-accuracy 10-bit D/A converterElectrical Characteristics (c = 100pF, fcp = v; fosc (adjustable by R1),Ta = 25°CCondition. . f = 4 ..
MN3005 ,4096-STAGE LONG DELAY BBDElectrical Characteristics (Ta = 25°C, VDD = kve = --15V, VCPH = 0V, VGG = --14V, Ru = 100ki2)Item ..
MM58274CN
Microprocessor Compatible Real Time Clock
TL/F/11219
MM58274C
Microprocessor
Compatible
Real
Time
Clock
April 1991
MM58274C
Microprocessor Compatible Real Time Clock
General Description
The MM58274Cis fabricatedusinglow threshold metal gate
CMOS technologyandis designedto operateinbus orient- microprocessor systems whereareal timeclockandcal-
endar functionare required.The on-chip 32.768kHz crystal
controlled oscillatorwill maintain timekeeping downto 2.2V allowlow power standby battery operation. This deviceis
pin compatible withthe MM58174Abut continues timekeep-
ingupto tensof years. The MM58274Cisa direct replace-
mentforthe MM58274 offering improvedBus access cycle
times.
Applications Pointof sale terminals Teller terminals Word processors Data logging Industrial process control
Features Same pin-out as MM58174A, MM58274B, and
MM58274 Timekeeping from tenthsof secondsto tensof yearsin
independently accessible registers Leap year register Hours counter programmablefor12or 24-hour
operation Buffered crystal frequency outputin test modefor easy
oscillator setting Data-changedflag allows simple testingfor time
rollover Independent interrupting time with open drain output Fully TTL compatible Low power standby operation(10mAat 2.2V) Low cost 16-pinDIP and 20-pin PCC
Block Diagram
TL/F/11219–1
FIGURE1
TRI-STATEÉ isaregistered trademarkof National SemiconductorCorp.
MicrobusTM isatrademarkof National SemiconductorCorp.
C1995National SemiconductorCorporation RRD-B30M105/PrintedinU.S.A.
