MM58174A Datasheet | National

MM58174A Microprocessor-patible Real-Time Clock May 1991 MM58174A Microprocessor-patible Real-Time Clock General 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 Y Y Y Y Y TTL patible Low power standby operation (2 2V 10 mA) Low cost internally biased oscillator Low cost 16-pin dual-in-line package Available for mercial and military...