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MM58274C

更新时间： 2024-11-20 22:46:11

品牌	Logo	应用领域
美国国家半导体 - NSC		微处理器时钟
页数	文件大小	规格书
16页	230K
描述
Microprocessor Compatible Real Time Clock

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数据手册

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MM58274C 数据手册

April 1991

MM58274C

Microprocessor Compatible Real Time Clock

General Description

Features

Same pin-out as MM58174A, MM58274B, and

MM58274

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.

Timekeeping from tenths of seconds to tens of years in

independently accessible registers

Leap year register

Hours counter programmable for 12 or 24-hour

operation

Buffered crystal frequency output in test mode for easy

oscillator setting

Data-changed flag allows simple testing for time

rollover

Applications

Independent interrupting time with open drain output

Fully TTL compatible

Point of sale terminals

Teller terminals

Low power standby operation (10 mA at 2.2V)

Low cost 16-pin DIP and 20-pin PCC

Word processors

Data logging

Industrial process control

Block Diagram

TL/F/11219–1

FIGURE 1

TRI-STATEÉ is a registered trademark of National Semiconductor Corp.

Microbus^TMis a trademark of National Semiconductor Corp.

1995 National Semiconductor Corporation

TL/F/11219

RRD-B30M105/Printed in U. S. A.

12 3 4 5 6 7...16

中文翻译

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与MM58274C相关器件

型号	品牌	获取价格	描述	数据表
MM58274C-12	NSC	获取价格	MICROPROCESSOR COMPATIBLE REAL TIME CLOCK
MM58274CJ	NSC	获取价格	Microprocessor Compatible Real Time Clock
MM58274CJ-12	NSC	获取价格	MICROPROCESSOR COMPATIBLE REAL TIME CLOCK
MM58274CJ-12	TI	获取价格	0 TIMER(S), REAL TIME CLOCK, CDIP16, CERAMIC, DIP-16
MM58274CN	NSC	获取价格	Microprocessor Compatible Real Time Clock
MM58274CN-12	NSC	获取价格	MICROPROCESSOR COMPATIBLE REAL TIME CLOCK
MM58274CV	NSC	获取价格	Microprocessor Compatible Real Time Clock
MM58274CV-12	NSC	获取价格	MICROPROCESSOR COMPATIBLE REAL TIME CLOCK
MM58274CV-12	TI	获取价格	0 TIMER(S), REAL TIME CLOCK, PQCC20, PLASTIC, LCC-20
MM58274CVX	TI	获取价格	0 TIMER(S), REAL TIME CLOCK, PQCC20, PLASTIC, LCC-20