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 supply voltage varies. The µPD4992 uses the 8-bit bus to facilitate interfacing with a microprocessor.

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 selectable
• 8-bit parallel input/output in BCD data format
• 12 kinds of interval timer output (can be used as watchdog timer)
• Internal voltage detection circuit for automatic determination of battery run-down
• High accuracy