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參數資料
| 型號： | MM58174 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | Microprocessor-Compatible Real-Time Clock |
| 中文描述： | 微處理器兼容實時時鐘 |
| 文件頁數： | 1/8頁 |
| 文件大小： | 130K |
| 代理商： | MM58174 |
TL/F/6681
M
May 1991
MM58174A
Microprocessor-Compatible Real-Time Clock
General Description
The MM58174A is a low-threshold metal-gate CMOS circuit
that functions as a real-time clock and calendar in bus-ori-
ented microprocessor systems. The device includes an in-
terrupt timer which may be programmed to one of three
times. Timekeeping is maintained down to 2.2V to allow low
power standby battery operation. The timebase is generat-
ed from a 32768 Hz crystal-controlled oscillator.
Features
Y
Microprocessor compatible
Y
Tenths of seconds, seconds, tens of seconds, minutes,
tens of minutes, day of week, days, tens of days,
months, tens of months, independent registers
Y
Automatic leap year calculation
Y
Internal pull-ups to safeguard data
Y
Protection for read during data changing
Y
Independent interrupt system with open drain output
Y
TTL compatible
Y
Low power standby operation (2.2V, 10
m
A)
Y
Low cost internally biased oscillator
Y
Low cost 16-pin dual-in-line package
Y
Available for commercial and military temperature
ranges
Applications
Y
Point-of-sale terminals
Y
Word processors
Y
Teller terminals
Y
Event recorders
Y
Microprocessor-controlled instrumentation
Y
Microprocessor time clock
Y
TV/VCR reprogramming
Y
Intelligent telephone
Block Diagram
TL/F/6681–1
FIGURE 1
TRI-STATE
é
is a registered trademark of National Semiconductor Corporation.
C
1995 National Semiconductor Corporation
RRD-B30M105/Printed in U. S. A.
相關PDF資料 |
PDF描述 |
|---|---|
| MM58174A | Microprocessor-Compatible Real-Time Clock |
| MM58174AN | Microprocessor-Compatible Real-Time Clock |
| MM58241 | MM58241 High Voltage Display Driver |
| MM58241N | MM58241 High Voltage Display Driver |
| MM58241V | MM58241 High Voltage Display Driver |
相關代理商/技術參數 |
參數描述 |
|---|---|
| MM58174A | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Microprocessor-Compatible Real-Time Clock |
| MM58174AN | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Microprocessor-Compatible Real-Time Clock |
| MM58201 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Multiplexed LCD Driver |
| MM58241 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:MM58241 High Voltage Display Driver |
| MM58241N | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:MM58241 High Voltage Display Driver |
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