MM54C221

更新时间： 2024-11-11 22:46:11

品牌	Logo	应用领域
美国国家半导体 - NSC		振荡器
页数	文件大小	规格书
6页	150K
描述
Dual Monostable Multivibrator

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数据手册

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MM54C221 数据手册

February 1988

MM54C221/MM74C221 Dual Monostable Multivibrator

General Description

The MM54C221/MM74C221 dual monostable multivibrator

is a monolithic complementary MOS integrated circuit. Each

multivibrator features a negative-transition-triggered input

and a positive-transition-triggered input, either of which can

be used as an inhibit input, and a clear input.

Pulse stability will be limited by the accuracy of external

timing components. The pulse width is approximately de-

information and applications, see AN-138.

fined by the relationship t

W(OUT)

EXT EXT

. For further

Features

Once fired, the output pulses are independent of further

transitions of the A and B inputs and are a function of the

Wide supply voltage range

4.5V to 15V

1.0V

external timing components C

EXT

width is stable over a wide range of temperature and V

and R . The pulse

EXT

Guaranteed noise margin

High noise immunity

0.45 V (typ.)

Low power TTL compatibility

fan out of 2

driving 74L

Connection Diagrams

Timing Component

Dual-In-Line Package

TL/F/5904–1

TL/F/5904–2

Top View

Order Number MM54C221 or MM74C221

Truth Table

Inputs

Outputs

Clear

High level

Low level

Transition from low to high

Transition from high to low

One high level pulse

One low level pulse

Irrelevant

1995 National Semiconductor Corporation

TL/F/5904

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

12 3 4 5 6

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