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PDF MM54C221 Data sheet ( Hoja de datos )
| Número de pieza | MM54C221 | |
| Descripción | Dual Monostable Multivibrator | |
| Fabricantes | National | |
| Logotipo |  |
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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 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 de-
fined by the relationship tW(OUT) CEXT REXT For further
information and applications see AN-138
Features
Y Wide supply voltage range
Y Guaranteed noise margin
Y High noise immunity
Y Low power TTL compatibility
4 5V to 15V
1 0V
0 45 VCC (typ )
fan out of 2
driving 74L
Connection Diagrams
Timing Component
Dual-In-Line Package
TL F 5904 – 1
Truth Table
Clear
L
X
X
H
H
Inputs
A
X
H
X
L
v
B
X
X
L
u
H
Top View
TL F 5904 – 2
Order Number MM54C221 or MM74C221
Outputs
QQ
LH
LH
LH
H e High level
L e Low level
u e Transition from low to high
v e Transition from high to low
e One high level pulse
e One low level pulse
X e Irrelevant
C1995 National Semiconductor Corporation TL F 5904
RRD-B30M105 Printed in U S A
1 page  
Switching Time Waveforms
tr e tf e 20 ns
Physical Dimensions inches (millimeters)
TL F 5904 – 7
Ceramic Dual-In-Line Package (J)
Order Number MM54C221J or MM74C221C
NS Package Number J16A
5
5 Page | ||
| Páginas | Total 6 Páginas | |
| PDF Descargar | [ Datasheet MM54C221.PDF ] | |
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| Número de pieza | Descripción | Fabricantes |
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