Ic Data; Main Pcb (E820-1 Pcb); Terminal Assignments - Casio QT-6000 Service Manual

10. IC DATA

MAIN PCB (E820-1 PCB)

1. ALVCH16244 (IC13, 17)
1OE
1
1Y1
2
1Y2
3
GND
4
1Y3
5
1Y4
6
V
7
CC
2Y1
8
2Y2
9
GND
10
2Y3
11
2Y4
12
3Y1
13
3Y2
14
GND
15
3Y3
16
3Y4
17
V
18
CC
4Y1
19
4Y2
20
GND
21
4Y3
22
4Y4
23
4OE
24

terminal assignments

1
A 1OE
B 1Y2 1Y1
C 1Y4 1Y3
D 2Y2 2Y1
E 2Y4 2Y3
F 3Y1 3Y2
G 3Y3 3Y4
H 4Y1 4Y2
J 4Y3 4Y4
K 4OE
NC No internal connection
2OE
48
1A1
47
1A2
46
GND
45
1A3
44
1A4
43
V
42
CC
2A1
41
2A2
40
GND
39
2A3
38
2A4
37
3A1
36
3A2
35
GND
34
3A3
33
3A4
32
V
31
CC
4A1
30
4A2
29
GND
28
4A3
27
4A4
26
3OE
25
2 3 4
NC NC NC
GND GND
V CC V CC
GND GND
GND GND
V CC V CC
GND GND
NC NC NC
logic diagram (positive logic)
1
1OE
47 2
1A1 1Y1
46 3
1A2 1Y2
44 5
1A3 1Y3
43 6
1A4 1Y4
48
2OE
41 8
2A1 2Y1
40 9
2A2 2Y2
38 11
2A3 2Y3
37 12
2A4 2Y4
5 6
NC 2OE
1A1 1A2
1A3 1A4
2A1 2A2
2A3 2A4
3A2 3A1
3A4 3A3
4A2 4A1
4A4 4A3
NC 3OE
— 91 —
25
3OE
36 13
3A1 3Y1
35 14
3A2 3Y2
33 16
3A3 3Y3
32 17
3A4 3Y4
24
4OE
30 19
4A1 4Y1
29 20
4A2 4Y2
27 22
4A3 4Y3
26 23
4A4 4Y4
FUNCTION TABLE
(each 4-bit buffer)
INPUTS
OUTPUT OUTPUT
Y
OE A
L H H
L L L
H X Z