Datasheet > 微控制器和处理器 > 计时器或实时时钟> UPD4990A

UPD4990A

更新时间： 2024-01-11 09:47:03

品牌	Logo	应用领域
日电电子 - NEC		时钟
页数	文件大小	规格书
20页	129K
描述
SERIAL I/O CALENDAR & CLOCK CMOS LSI

阅读下载

中文翻译

获取价格

数据手册

如果您发现信息不准确，欢迎纠错

UPD4990A 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

中文翻译

下载PDF

与UPD4990A相关器件

型号	品牌	获取价格	描述	数据表
UPD4990AC	NEC	获取价格	SERIAL I/O CALENDAR & CLOCK CMOS LSI
UPD4990AC-A	NEC	获取价格	Real Time Clock, 0 Timer(s), CMOS, PDIP14, DIP-14
UPD4990AG	NEC	获取价格	SERIAL I/O CALENDAR & CLOCK CMOS LSI
UPD4990AG-A	NEC	获取价格	Consumer Circuit, CMOS, PDSO16, 0.300 INCH, PLASTIC, SOP-16
UPD4991A	NEC	获取价格	4-BIT PARALLEL I/O CALENDAR CLOCK
UPD4991ACX	NEC	获取价格	4-BIT PARALLEL I/O CALENDAR CLOCK
UPD4991ACX-A	NEC	获取价格	暂无描述
UPD4991AGS	NEC	获取价格	4-BIT PARALLEL I/O CALENDAR CLOCK
UPD4991AGS-A	RENESAS	获取价格	UPD4991AGS-A
UPD4991AGS-T1-A	RENESAS	获取价格	UPD4991AGS-T1-A