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UPD4991AGS Datasheet

  • UPD4991AGS

  • 4-BIT PARALLEL I/O CALENDAR CLOCK

  • 32頁(yè)

  • NEC   NEC

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DATA SHEET
MOS INTEGRATED CIRCUIT
碌
PD4991A
4-BIT PARALLEL I/O CALENDAR CLOCK
The
碌
PD4991A is a CMOS integrated circuit that has the ability to input/output 4-bit parallel time data and calendar
data to/from a microcomputer and includes an alarm function.
Its reference oscillation frequency is 32.768 kHz. Hour, minute, second, year, month, day, and date data is stored
internally.
The
碌
PD4991A consumes 30 % less power than the
碌
PD4991.
FEATURES:
鈥?Time (hour, minute, and second) and calendar (leap year, year, month, day, and date) counters
鈥?Leap year can be automatically identified or set
鈥?12- and 24-hour modes selectable
鈥?4-bit parallel input/output in BCD data format
鈥?Alarm function (hour, minute, second, month, day, date)
鈥?One of 0.1, 1.0, 10, 30, and 60-s interval timer outputs selectable
鈥?One of 2048, 1024, 64, 16, 1 Hz, 1-pulse output, and H鈫扡 output selectable as alarm coincidence output
鈥?Upward compatible with
碌
PD4991
鈥?Low power consumption: 2
碌
A typ. (V
DD
= 2.4 V)
ORDERING INFORMATION:
Part Number
Package
18-pin plastic DIP (300 mil)
20-pin plastic SOP (300 mil)
碌
PD4991ACX
碌
PD4991AGS
Document No. IC-3309 (1st edition)
(O.D. No. IC-7892A)
Date Published March 1997 P
Printed in Japan
漏
1995
1993

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