Denon S-81 - Function Table

37
S-81/S-81DAB
TC7WH157FU (IC308 : 1U-3760)
SN74LV244A (IC309 : 1U-3760)
8
Vcc
7
ST
6
SELECT
5
Y
1
A
2
B
3
Y
4
GND
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
1OE
1A1
2Y4
1A2
2Y3
1A3
2Y2
1A4
2Y1
GND
V
CC
2OE
1Y1
2A4
1Y2
2A3
1Y3
2A2
1Y4
2A1
(TOP VIEW)
FUNCTION TABLE
(each buffer)
INPUTS
OUTPUT
OE A
OUTPUT
Y
L H H
L LL
H X Z
logic diagram (positive logic)
1
218
1Y1
1OE
1A1
416
1Y2
1A2
614
1Y3
1A3
812
1Y4
1A4
19
11 9
2Y1
2OE
2A1
13 7
2Y2
2A2
15 5
2Y3
2A3
17 3
2Y4
2A4