m74hc123 STMicroelectronics, m74hc123 Datasheet - Page 2

• Manufacturer Part Number: m74hc123
• Description: Dual Retriggerable Monostable Multivibrator
• Manufacturer: STMicroelectronics

M74HC123
INPUT AND OUTPUT EQUIVALENT CIRCUIT
TRUTH TABLE
X : Don’t Care
2/12
A
X
H
X
L
L
INPUTS
B
H
X
H
X
L
CLR
H
H
H
H
L
Q
L
L
L
OUTPUTS
PIN DESCRIPTION
Q
H
H
H
PIN No
2, 10
3, 11
4, 12
13, 5
14, 6
1,9
15
16
7
8
SYMBOL
2R
1R
1Q, 2Q
1Q, 2Q
1A, 2A
1B, 2B
1 CLR
2 CLR
GND
1C
2C
Vcc
X
X
/C
/C
X
X
OUTPUT ENABLE
OUTPUT ENABLE
OUTPUT ENABLE
X
X
INHIBIT
INHIBIT
INHIBIT
Trigger Inputs (Negative
Edge Triggered)
Trigger Inputs (Positive
Edge Triggered)
Direct Reset LOW and
trigger Action at Positive
Edge
Outputs (Active Low)
External Resistor
Capacitor Connection
Outputs (Active High)
External Capacitor
Connection
External Resistor
Capacitor Connection
Ground (0V)
Positive Supply Voltage
NOTE
NAME AND FUNCTION