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Details, datasheet, quote on part number:UPD4991ACX
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Datasheet text preview:
DATA SHEET
MOS INTEGRATED CIRCUIT
µPD4991A
4-BIT PARALLEL I/O CALENDAR CLOCK
The µPD4991A 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 µPD4991A consumes 30 % less power than the µPD4991.
FEATURES:
· Time (hour, minute, and second) and calendar (leap year, year, month, day, and date) counters · Leap year can be automatically identified or set · 12- and 24-hour modes selectable · 4-bit parallel input/output in BCD data format · Alarm function (hour, minute, second, month, day, date) · One of 0.1, 1.0, 10, 30, and 60-s interval timer outputs selectable · One of 2048, 1024, 64, 16, 1 Hz, 1-pulse output, and HL output selectable as alarm coincidence output · Upward compatible with µPD4991 · Low power consumption: 2 µA typ. (VDD = 2.4 V)
ORDERING INFORMATION:
Part Number Package 18-pin plastic DIP (300 mil) 20-pin plastic SOP (300 mil)
µP D 4 9 9 1 A C X µP D 4 9 9 1 A G S
Document No. IC-3309 (1st edition) (O.D. No. IC-7892A) Date Published March 1997 P Printed in Japan
©
1995 3
µPD4991A
PIN CONFIGURATION (Top View)
CS1 1 TP1 2 TP2 3 A0 4 A1 5 A2 6 A3 7 OE 8 VSS 9
µ PD4991ACX
18 VDD 17 XIN 16 XOUT 15 CS2
CS1 1 TP1 2 TP2 3 A0 4 NC 5
20 VDD 19 XIN 18 XOUT 17 CS2 16 D3 15 NC 14 D2 13 D1 12 D0 11 WE
µ PD4991AGS
14 D3 A1 6 13 D2 A2 7 12 D1 11 D0 10 WE A3 8 OE 9 VSS 10
2
OSC 15stage Binary Divider 1/2 SEC. CLOCK STOP CLOCK WAIT MIN. HOUR WEEK DAY MONTH YEAR
15
TIMING PULSE GENERATOR TIME COUNTER
BLOCK DIAGRAM
XIN
XOUT
Nch OPEN DRAIN
CS1 COMPARATOR MPX
TP1
CS2
WE ALARM
D3
D2
D0
DATA BUS CONTROLLER
D1
DATA BUS
OE
TP2
MODE REGISTER
CONTROL REGISTER 1
A3
DDDRESS A ECODER
A2
CONTROL REGISTER 2
A0
ADDRESS BUS CONTROLLER
A1
µPD4991A
3
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