MM74C221N_NL

更新时间： 2024-09-30 13:11:39

品牌	Logo	应用领域
飞兆/仙童 - FAIRCHILD		振荡器
页数	文件大小	规格书
6页	67K
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数据手册

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MM74C221N_NL 数据手册

November 1987

Revised January 1999

MM74C221

Dual Monostable Multivibrator

Pulse stability will be limited by the accuracy of external

timing components. The pulse width is approximately

defined by the relationship t_W(OUT)≈ C_EXTR_EXT. For fur-

General Description

The MM74C221 dual monostable multivibrator is a mono-

lithic complementary MOS integrated circuit. Each multivi-

brator 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.

ther information and applications, see AN-138.

Features

■ Wide supply voltage range: 4.5V to 15V

Once fired, the output pulses are independent of further

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

external timing components C_EXTand R_EXT. The pulse

■ Guaranteed noise margin: 1.0V

■ High noise immunity: 0.45 V_CC(typ.)

width is stable over a wide range of temperature and V_CC

■ Low power TTL compatibility: fan out of 2 driving 74L

Ordering Code:

Order Number Package Number

Package Description

74MMC221N

N16E

16-Lead Plastic Dual-in-Line Package (PDIP), JEDEC MS-001, 0.300” Wide

Connection Diagrams

Truth Table

Inputs

Outputs

Timing Component

Clear

↑

↓

H = HIGH Level

L = LOW Level

= One HIGH level pulse

= One LOW level pulse

Pin Assignments for DIP

↑ = Transition from LOW-to-HIGH

↓ = Transition from HIGH-to-LOW

X= Irrelevant

Top View

DS005904.prf

www.fairchildsemi.com

12 3 4 5 6

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