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 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}}


Pinout




Specifications

Item	Symbol	RATINGS	UNIT
Supply voltage	VDD	0.3 to 7.0	V
nput voltage range	VIN	0.3 to VDD + 0.3	V
Output pin withstand voltage	VOUT	7.0	V
Low level output current(N ch Open Drain)	IOUT	30	mA
Operating temperature range	Topt	40 to +85	°C
Storage temperature range	Tstg	65 ~ +125	°C

Description

The µPD4992 is a CMOS integrated circuit which outputs 8-bit parallel time and calendar data in a system in whicha microprocessor is employed.  The µPD4992 operates at 32.768 kHz and provides year, month, day of month, dayofweek, hour, minute, and second data to a system.  The µPD4992 internally contains a voltage regulator so thatlow power consumption operation and high accuracy are realized even if the supply voltage varies.  The µPD4992uses the 8-bit bus to facilitate interfacing with a microprocessor.