MM58174A - Microprocessor-Compatible Real-Time Clock

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 batte

• Y Y Y Y Y Y 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 Point-of-sale terminals Word processors Teller terminals Event recorders Microprocessor-controlled instrumentation Microprocessor time clock TV VCR reprogramm.