欢迎访问ic37.com |
会员登录 免费注册
发布采购

UPD4991AGS 参数 Datasheet PDF下载

UPD4991AGS图片预览
型号: UPD4991AGS
PDF下载: 下载PDF文件 查看货源
内容描述: 4位并行I / O日历时钟 [4-BIT PARALLEL I/O CALENDAR CLOCK]
分类和应用: 计时器或实时时钟微控制器和处理器外围集成电路光电二极管双倍数据速率
文件页数/大小: 32 页 / 133 K
品牌: NEC [ NEC ]
 浏览型号UPD4991AGS的Datasheet PDF文件第2页浏览型号UPD4991AGS的Datasheet PDF文件第3页浏览型号UPD4991AGS的Datasheet PDF文件第4页浏览型号UPD4991AGS的Datasheet PDF文件第5页浏览型号UPD4991AGS的Datasheet PDF文件第6页浏览型号UPD4991AGS的Datasheet PDF文件第7页浏览型号UPD4991AGS的Datasheet PDF文件第8页浏览型号UPD4991AGS的Datasheet PDF文件第9页  
DATA SHEET
MOS INTEGRATED CIRCUIT
µ
PD4991A
4-BIT PARALLEL I/O CALENDAR CLOCK
The
µ
PD4991A 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
µ
PD4991A consumes 30 % less power than the
µ
PD4991.
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 H→L output selectable as alarm coincidence output
• Upward compatible with
µ
PD4991
• Low power consumption: 2
µ
A typ. (V
DD
= 2.4 V)
ORDERING INFORMATION:
Part Number
Package
18-pin plastic DIP (300 mil)
20-pin plastic SOP (300 mil)
µ
PD4991ACX
µ
PD4991AGS
Document No. IC-3309 (1st edition)
(O.D. No. IC-7892A)
Date Published March 1997 P
Printed in Japan
©
1995
1993