參數(shù)資料
型號： MM74C221N
廠商： FAIRCHILD SEMICONDUCTOR CORP
元件分類： 諧振器
英文描述： Dual Monostable Multivibrator; Package: DIP; No of Pins: 16; Container: Rail
中文描述： CMOS SERIES, DUAL MONOSTABLE MULTIVIBRATOR, PDIP16
封裝： 0.300 INCH, PLASTIC, MS-001, DIP-16
文件頁數(shù)： 1/6頁
文件大?。?/td> 75K
代理商： MM74C221N
2002 Fairchild Semiconductor Corporation
DS005904
www.fairchildsemi.com
November 1987
Revised May 2002
MM74C221
Dual
Monosta
ble
Mult
ivi
b
rat
o
r
MM74C221
Dual Monostable Multivibrator
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.
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 CEXT and REXT. The pulse
width is stable over a wide range of temperature and VCC.
Pulse stability will be limited by the accuracy of external
timing components. The pulse width is approximately
defined by the relationship tW(OUT) ≈ CEXT REXT. For fur-
ther information and applications, see AN-138.
Features
s Wide supply voltage range:
4.5V to 15V
s Guaranteed noise margin: 1.0V
s High noise immunity: 0.45 VCC (typ.)
s Low power TTL compatibility: fan out of 2 driving 74L
Ordering Code:
Connection Diagrams
Timing Component
Top View
Truth Table
H
= HIGH Level
L
= LOW Level
X
= Irrelevant
↑ = Transition from LOW-to-HIGH
↓ = Transition from HIGH-to-LOW
= One HIGH Level Pulse