CD74HC123 Datasheet, PDF (2/8 Pages) Texas Instruments – High Speed CMOS Logic Dual Retriggerable Monostable Multivibrators with Resets

CD74HC123, CD74HCT123, CD74HC423, CD74HCT423
Functional Diagram
1A
1
1B
2
1R
3
11
2R
9
2A
10
2B
1Cx 1Rx
14
15
V_CC
1Cx
1RxCx
13
1Q
MONO 1
4
1Q
MONO 2
5
2Q
12
2Q
2Cx
2RxCx
6
7
2Cx 2Rx
V_CC
TRUTH TABLE
INPUTS
A
B
R
CD74HC/HCT123
H
X
H
X
L
H
L
↑
H
OUTPUTS
Q
Q
L
H
L
H
↓
H
H
X
X
L
L
H
L
H
↑
CD74HC/HCT423
H
X
H
L
H
X
L
H
L
H
L
↑
H
↓
H
H
X
X
L
L
H
NOTE: H = High Voltage Level, L = Low Voltage Level,
X = Don’t Care.
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