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MFG:NEC  Package Cooled:SMD  

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Part Number: UPD4992

 

MFG: NEC

Package Cooled: SMD

 

Description: The µPD4992 is a CMOS integrated circuit which outputs 8-bit parallel time and calendar data in a system in which...


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UPD4992 General 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.

UPD4992 Maximum Ratings

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

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

UPD4992 Connection Diagram

UPD4992 Connection Diagram

UPD4992 datasheet

UPD4992
PDF/DataSheet Download

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