MM58167B Datasheet | National

MM58167B Microprocessor Real Time Clock October 1990 MM58167B Microprocessor Real Time Clock General Description The MM58167B is a low threshold metal gate CMOS circuit that functions as a real time clock in bus oriented microprocessor systems The device includes an addressable real time counter 56 bits of RAM and two interrupt outputs A POWER DOWN input allows the chip to be disabled from the rest of the system for standby low power operation The time base is a 32 768 kHz crystal oscillator Features 56 bits of RAM with parator to pare the real time counter to the RAM data 2 INTERRUPT OUTPUTS with 8 possible interrupt signals POWER DOWN input that disables...