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MM54C221 Datasheet(PDF) 1 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Part # MM54C221
Description  Dual Monostable Multivibrator
PDF  6 Pages
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Manufacturer  NSC [National Semiconductor (TI)]
Direct Link  http://www.national.com
Logo NSC - National Semiconductor (TI)

MM54C221 Datasheet(HTML) 1 Page - National Semiconductor (TI)

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TLF5904
February 1988
MM54C221MM74C221 Dual Monostable Multivibrator
General Description
The MM54C221MM74C221 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
45V to 15V
Y
Guaranteed noise margin
10V
Y
High noise immunity
045 VCC (typ)
Y
Low power TTL compatibility
fan out of 2
driving 74L
Connection Diagrams
Timing Component
TLF5904 – 1
Dual-In-Line Package
TLF5904 – 2
Top View
Order Number MM54C221 or MM74C221
Truth Table
Inputs
Outputs
Clear
A
B
Q
Q
LX
X
L
H
XH
X
L
H
XX
L
L
H
HL
u
H
v
H
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
RRD-B30M105Printed in U S A


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