Datasheet > UPD4990AG-A

UPD4990AG-A

更新时间： 2024-11-24 21:16:27

品牌	Logo	应用领域
日电电子 - NEC		光电二极管
页数	文件大小	规格书
20页	129K
描述
Consumer Circuit, CMOS, PDSO16, 0.300 INCH, PLASTIC, SOP-16

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中文翻译

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数据手册

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UPD4990AG-A 数据手册

DATA SHEET

MOS INTEGRATED CIRCUIT

µPD4990A

SERIAL I/O CALENDAR & CLOCK

CMOS LSI

The µPD4990A 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

week.

FEATURES

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.

ORDERING INFORMATION

PART No.

µPD4990AC

µPD4990AG

PACKAGE

14-pin plastic DIP (300 mil)

16-pin plastic SOP (300 mil)

CONNECTION DIAGRAM (Top View)

DD (+)

TAL

STB

13 NC

STB

11 OUT ENBL

10 TP

12 OUT ENBL

11 TP

DATA IN

GND

DATA OUT

CLK

DATA IN

GND

10 DATA OUT

(V^SS

)

CLK

µ PD4990AC

(V^SS

)

µPD4990AG

NC: NO CONNECTION

Document No. IC-1755 (1st edition)

Date Published March 1997 P

Printed in Japan

1989

12 3 4 5 6 7...20

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