HD74AC123A Datasheet, PDF (2/7 Pages) Hitachi Semiconductor – Dual Retriggerable Resettable Multivibrator

HD74AC123A
Logic Symbol
9(1) ^A
10(2) _B
76
(15) (14)
R_XC_X
C_X
Q
5(13)
Q
C_D
12(4)
11
(3)
V_CC = Pin16
GND = Pin8
Pin Names
A₁, A ₂
B₁, B₂
C_D1, C_D2
Q₁, Q₂
Q₁, Q ₂
Trigger Inputs (Active Falling Edge)
Trigger Inputs (Active Rising Edge)
Direct Clear Inputs (Active Low)
Positive Pulse Outputs
Negative Pulse Outputs
Triggering Truth Table
Inputs
A
B
X
X
L
H
H
L
L
H
H : High Voltage Level
L : Low Voltage Level
X : Immaterial
: Low-to-High Transition
: High-to-Low Transition
C_D
L
X
H
X
H
Response
No trigger
No trigger
Trigger
No trigger
Trigger
Trigger
Rev.2.00, Jul.16.2004, page 2 of 6