Marantz ST7001/N1S Service Manual page 33

IC205 : MM74LCX244
IC207 : MM74HCT244
FUNCTION TABLE
(each buffer/driver)
INPUTS
OUTPUT
Y
OE A
L H H
L L L
H X Z
IC206 : 74VHCU04
FUNCTION TABLE
(each inverter)
INPUT OUTPUT
A Y
H L
L H
A
1
1OE
2
1A1
4
1A2
6
1A3
8
1A4
Y
39
19
2OE
18 11
1Y1
2A1
16
13
1Y2
2A2
14
15
1Y3
2A3
12
17
1Y4 2A4
9
2Y1
7
2Y2
5
2Y3
3
2Y4