UPD4990AG Renesas Electronics America, UPD4990AG Datasheet - Page 3

• Manufacturer Part Number: UPD4990AG
• Manufacturer: Renesas Electronics America

Specifications of UPD4990AG

• Lead Free Status / RoHS Status: Supplier Unconfirmed

Document No. IC-1755 (1st edition)
Date Published March 1997 P
Printed in Japan
week.
FEATURES
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ORDERING INFORMATION
CONNECTION DIAGRAM (Top View)
DATA IN
The PD4990A is a CMOS LSI developed to input/output calendar & clock data serially to/from the micro computer.
The crystal frequency is 32.768 kHz and the data items included are time, minute, second, year, month, day, and
Built-in counters for time (hour, minute, and second) and date (year, month, day, and week)
Leap years are adjusted automatically.
Data is represented in BCD notation (except months in hexadecimal notation) and input/output serially.
Commands can be set by inputting serial data.
Selective timing pulses (TPs) are 64 Hz, 256 Hz, 2 048 Hz, and 4 096 Hz and selective output intervals are 1, 10,
30, and 60 seconds.
GND
(V
PART No.
PD4990AG
STB
PD4990AC
CS
SS
C
C
C
2
1
0
)
1
2
3
4
5
6
7
PD4990AC
14-pin plastic DIP (300 mil)
16-pin plastic SOP (300 mil)
SERIAL I/O CALENDAR & CLOCK
14
13
12
11
10
9
8
PACKAGE
V
X
X
OUT ENBL
TP
DATA OUT
CLK
DD
TAL
TAL
(+)
DATA SHEET
CMOS LSI
MOS INTEGRATED CIRCUIT
DATA IN
GND
(V
STB
NC
CS
SS
C
C
C
2
1
0
)
NC: NO CONNECTION
1
2
3
4
5
6
7
8
PD4990A
PD4990AG
16
15
14
13
12
11
10
9
©
V
X
X
NC
OUT ENBL
TP
DATA OUT
CLK
DD
TAL
TAL
(+)
1989