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参数资料
| 型号： | MM54C221 |
| 厂商： | National Semiconductor Corporation |
| 英文描述： | Dual Monostable Multivibrator |
| 中文描述： | 双单稳态触发器 |
| 文件页数： | 1/6页 |
| 文件大小： | 148K |
| 代理商： | MM54C221 |
TL/F/5904
M
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.
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
EXT
and R
EXT
. The pulse
width is stable over a wide range of temperature and V
CC
.
Pulse stability will be limited by the accuracy of external
timing components. The pulse width is approximately de-
fined by the relationship t
W(OUT)
&
C
EXT
R
EXT
. For further
information and applications, see AN-138.
Features
Y
Wide supply voltage range
4.5V to 15V
Y
Guaranteed noise margin
1.0V
Y
High noise immunity
0.45 V
CC
(typ.)
fan out of 2
driving 74L
Y
Low power TTL compatibility
Connection Diagrams
Timing Component
TL/F/5904–1
Dual-In-Line Package
TL/F/5904–2
Top View
Order Number MM54C221 or MM74C221
Truth Table
Inputs
Outputs
Clear
A
B
Q
Q
L
X
X
L
H
X
H
X
L
H
X
X
L
u
L
H
H
L
v
é
H
H
é
H
L
u
v
é
e
One high level pulse
e
One low level pulse
X
e
Irrelevant
e
High level
e
Low level
e
Transition from low to high
e
Transition from high to low
C
1995 National Semiconductor Corporation
RRD-B30M105/Printed in U. S. A.
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| MM54C221N | Dual Monostable Multivibrator |
| MM54C240 | Octal Buffers and Line Drivers with TRI-STATE Outputs |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MM54C221 WAF | 制造商:Texas Instruments 功能描述: |
| MM54C221J | 制造商:NSC 制造商全称:National Semiconductor 功能描述:Dual Monostable Multivibrator |
| MM54C221J/883 | 制造商:National Semiconductor Corporation 功能描述:Monostable Multivibrator Dual |
| MM54C221N | 制造商:NSC 制造商全称:National Semiconductor 功能描述:Dual Monostable Multivibrator |
| MM54C221W/883 | 制造商:Rochester Electronics LLC 功能描述:- Bulk 制造商:Texas Instruments 功能描述: |
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