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參數資料
| 型號： | MM58274C |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | Microprocessor Compatible Real Time Clock |
| 中文描述： | 微處理器兼容的實時時鐘 |
| 文件頁數： | 1/16頁 |
| 文件大小： | 228K |
| 代理商： | MM58274C |
TL/F/11219
M
April 1991
MM58274C
Microprocessor Compatible Real Time Clock
General Description
The MM58274C is fabricated using low threshold metal gate
CMOS technology and is designed to operate in bus orient-
ed microprocessor systems where a real time clock and cal-
endar function are required. The on-chip 32.768 kHz crystal
controlled oscillator will maintain timekeeping down to 2.2V
to allow low power standby battery operation. This device is
pin compatible with the MM58174A but continues timekeep-
ing up to tens of years. The MM58274C is a direct replace-
ment for the MM58274 offering improved Bus access cycle
times.
Applications
Y
Point of sale terminals
Y
Teller terminals
Y
Word processors
Y
Data logging
Y
Industrial process control
Features
Y
Same
MM58274
pin-out
as
MM58174A,
MM58274B,
and
Y
Timekeeping from tenths of seconds to tens of years in
independently accessible registers
Y
Leap year register
Y
Hours counter programmable for 12 or 24-hour
operation
Y
Buffered crystal frequency output in test mode for easy
oscillator setting
Y
Data-changed flag allows simple testing for time
rollover
Y
Independent interrupting time with open drain output
Y
Fully TTL compatible
Y
Low power standby operation (10
m
A at 2.2V)
Y
Low cost 16-pin DIP and 20-pin PCC
Block Diagram
TL/F/11219–1
FIGURE 1
TRI-STATE
é
is a registered trademark of National Semiconductor Corp.
Microbus
TM
is a trademark of National Semiconductor Corp.
C
1995 National Semiconductor Corporation
RRD-B30M105/Printed in U. S. A.
相關PDF資料 |
PDF描述 |
|---|---|
| MM58274CN | Microprocessor Compatible Real Time Clock |
| MM58274CV | Microprocessor Compatible Real Time Clock |
| MM58341 | High Voltage Display Driver |
| MM58341N | High Voltage Display Driver |
| MM58341V | High Voltage Display Driver |
相關代理商/技術參數 |
參數描述 |
|---|---|
| MM58274C-12 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:MICROPROCESSOR COMPATIBLE REAL TIME CLOCK |
| MM58274CJ | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Microprocessor Compatible Real Time Clock |
| MM58274CJ-12 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:MICROPROCESSOR COMPATIBLE REAL TIME CLOCK |
| MM58274CMJ | 制造商: 功能描述: 制造商:undefined 功能描述: |
| MM58274CN | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Microprocessor Compatible Real Time Clock |
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