UPD4992 Datasheet (NEC) - 8-Bit Parallel I/O Calendar Clock

UPD4992, 8-Bit Parallel I/O Calendar Clock

PRELIMINARY DATA SHEET MOS INTEGRATED CIRCUIT µPD4992 8-Bit Parallel I/O Calendar Clock The µPD4992 is a CMOS integrated circuit which outputs 8-bit parallel time and calendar data in a system in which a microprocessor is employed.

The µPD4992 operates at 32.768 kHz and provides year, month, day of month, day of week, hour, minute, and second data to a system.

The µPD4992 internally contains a voltage regulator so that low power consumption operation and high accuracy are realized even if the

UPD4992 Features

* Internal counter for time (hour, minute, second), and calendar (leap year, year, month, day of month, day of week)

* Super low power consumption (IDD = 2 µA MAX. at VDD = 2.4 V)

* Automatic determination of leap year, manual setting possible

* 12 hour/24 hour mode