音影先锋亚洲天堂网|电影世界尽头的爱完整版播放|国产 熟女 91|高清无码免费观看欧美日韩|韩国一区二区三区黄色录像|美女亚洲加勒比在线|亚洲综合网 开心五月|7x成人在线入口|成人网站免费日韩毛片区|国产黄片?一级?二级?三级

UPD4990AC Datasheet

  • UPD4990AC

  • SERIAL I/O CALENDAR & CLOCK CMOS LSI

  • 20頁(yè)

  • NEC   NEC

掃碼查看芯片數(shù)據(jù)手冊(cè)

上傳產(chǎn)品規(guī)格書(shū)

PDF預(yù)覽

DATA SHEET
MOS INTEGRATED CIRCUIT
碌
PD4990A
SERIAL I/O CALENDAR & CLOCK
CMOS LSI
The
碌
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
week.
FEATURES
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
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.
PACKAGE
14-pin plastic DIP (300 mil)
16-pin plastic SOP (300 mil)
碌
PD4990AC
碌
PD4990AG
CONNECTION DIAGRAM (Top View)
C
2
C
1
C
0
STB
CS
DATA IN
GND
(V
SS
)
1
2
3
4
5
6
7
14
13
12
11
10
9
8
V
DD
(+)
X
TAL
X
TAL
OUT ENBL
TP
DATA OUT
CLK
C
2
C
1
C
0
NC
STB
CS
DATA IN
GND
(V
SS
)
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
V
DD
(+)
X
TAL
X
TAL
NC
OUT ENBL
TP
DATA OUT
CLK
碌
PD4990AC
碌
PD4990AG
NC: NO CONNECTION
Document No. IC-1755 (1st edition)
Date Published March 1997 P
Printed in Japan
漏
1989

UPD4990AC相關(guān)型號(hào)PDF文件下載

掃碼下載APP，
一鍵連接廣大的電子世界。

在線人工客服

買家服務(wù)：
賣家服務(wù)：
技術(shù)客服：

0571-85317607

網(wǎng)站技術(shù)支持

13606545031

客服在線時(shí)間周一至周五
9:00-17:30

關(guān)注官方微信號(hào)，
第一時(shí)間獲取資訊。

建議反饋

聯(lián)系人：

聯(lián)系方式：

按住滑塊，拖拽到最右邊
>>
感謝您向阿庫(kù)提出的寶貴意見(jiàn)，您的參與是維庫(kù)提升服務(wù)的動(dòng)力！意見(jiàn)一經(jīng)采納，將有感恩紅包奉上哦！