JVC RX-DV31SL Service Manual page 48

6.26 NC7ST32P5-X (IC683) : 2-Input OR Gate
• Pin layout & Block diagram
Vcc
5
1
A
6.27 NC7SZ125P5-X (IC523) : Bus buffer gate with 3-state output
• Pin layout & Block diagram
VCC
5
1
OE
1-48 (No.22023)
Y
4
2 3
B GND
Y
4
2 3
A GND
• Truth table
INPUTS OUTPUT
A B Y
L L L
L H H
H L H
H H H
H : HIGH logic level
L : LOW logic level
• Truth table
INPUTS OUTPUT
OE B Y
L H H
L L L
H X Z
X: Don't care
Z: High impedance