Harman Kardon AVR347 Service Manual page 182

AVR347
74LCX74
INPUT AND OUTPUT EQUIVALENT CIRCUIT
PIN DESCRIPTION
PIN No
1, 13
2, 12
3, 11
4, 10
5, 9
6, 8
7
14
TRUTH TABLE
CLR
L
H
L
H
H
H
X : Don't Care
2/11
SYMBOL
1CLR, 2CLR Asynchronous Reset - Direct Input
1D, 2D Data Inputs
1CK, 2CK Clock Input (LOW to HIGH, Edge Triggered)
1PR, 2PR Asynchronous Set - Direct Input
1Q, 2Q True Flip-Flop Outputs
1Q, 2Q Complement Flip-Flop Outputs
GND Ground (0V)
V
Positive Supply Voltage
CC
INPUTS
PR D
H X
L X
L X
H L
H H
H X
NAME AND FUNCTION
OUTPUTS
CK Q
X L
X H
X H
L
H
Q
n
182
harman/kardon
FUNCTION
Q
H CLEAR
L PRESET
H
H
L
Q
NO CHANGE
n