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Número de pieza | MM74C221 | |
Descripción | Dual Monostable Multivibrator | |
Fabricantes | Fairchild | |
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Hay una vista previa y un enlace de descarga de MM74C221 (archivo pdf) en la parte inferior de esta página. Total 6 Páginas | ||
No Preview Available ! November 1987
Revised January 1999
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:
Order Number Package Number
Package Description
74MMC221N
N16E
16-Lead Plastic Dual-in-Line Package (PDIP), JEDEC MS-001, 0.300” Wide
Connection Diagrams
Timing Component
Pin Assignments for DIP
Truth Table
Inputs
Outputs
Clear
ABQ Q
L X XL H
X HX L H
X XL
H L↑
H ↓H
H = HIGH Level
L = LOW Level
= One HIGH level pulse
= One LOW level pulse
↑ = Transition from LOW-to-HIGH X= Irrelevant
↓ = Transition from HIGH-to-LOW
L
H
Top View
© 1999 Fairchild Semiconductor Corporation DS005904.prf
www.fairchildsemi.com
1 page Typical Performance Characteristics (Continued)
Switching Time Waveforms
tr = tf = 20 ns
5 www.fairchildsemi.com
5 Page |
Páginas | Total 6 Páginas | |
PDF Descargar | [ Datasheet MM74C221.PDF ] |
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