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MM58174AN Real-Time Clock


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Product Description:

The MM58174A is a low-threshold metal-gate CMOS circuit that functions as a real-time clock and calendar in bus-oriented microprocessor systems. The device includes an interrupt timer which may be programmed to one of three times. Timekeeping is maintained down to 2.2V to allow low power standby battery operation. The timebase is generated from a 32768 Hz crystal-controlled oscillator.

*Microprocessor compatible
*Tenths of seconds, seconds, tens of seconds, minutes, tens of minutes, day of week, days, tens of days, months, tens of months, independent registers
*Automatic leap year calculation
*Internal pull-ups to safeguard data
*Protection for read during data changing
*Independent interrupt system with open drain output
*TTL compatible
*Low power standby operation (2.2V, 10uA)
*Low cost internally biased oscillator
*Low cost 16-pin dual-in-line package
*Point-of-sale terminals
*Word processors
*Teller terminals
*Event recorders
*Microprocessor-controlled instrumentation
*Microprocessor time clock

MFG: National Semiconductor
MPN: MM58174AN


  • Model: 180-1149
  • Shipping Weight: 0.003lbs
  • 3 Units in Stock


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