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CD54HC221 Datasheet(PDF) 2 Page - Texas Instruments

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Part No. CD54HC221
Description  High-Speed CMOS Logic Dual Monostable Multivibrator with Reset
Download  18 Pages
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Maker  TI [Texas Instruments]
Homepage  http://www.ti.com
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CD54HC221 Datasheet(HTML) 2 Page - Texas Instruments

 
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2
Functional Diagram
TRUTH TABLE
INPUTS
OUTPUTS
AB
RQ
Q
HXH
L
H
XL
H
L
H
L
H
HH
XX
L
L
H
LH
(Note 3)
(Note 3)
H = High Voltage Level, L = Low Voltage Level, X = Irrelevant,
↑ = Transition from
Low to High Level, ↓ = Transition from High to Low Level,
= One High Level
Pulse,
= One Low Level Pulse
NOTE:
1. For this combination the reset input must be low and the following sequence
must be used: pin 1 (or 9) must be set high or pin 2 (or 10) set low; then pin 1
(or 9) must be low and pin 2 (or 10) set high. Now the reset input goes from low-
to-high and the device will be triggered.
2R
11
2A
9
10
5
12
2Q
2Q
2B
MONO 2
VCC
67
2CX
2CXRX
1R
3
1A
2
1
13
4
1Q
1Q
1B
MONO 1
VCC
14
15
1CX
1CXRX
1CX
1RX
2CX
2RX
CD54HC221, CD74HC221, CD74HCT221


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