MM58174A Datasheet (National) - Microprocessor-Compatible Real-Time Clock

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

MM58174A Features

* 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