Ic Data; Main Pcb - Casio QT-6100 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
C 1Y4
D 2Y2
E 2Y4
F 3Y1
G 3Y3
H 4Y1
J 4Y3
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
NC NC NC
1Y1 GND GND
1Y3 V CC V CC
2Y1 GND GND
2Y3
3Y2
3Y4 GND GND
4Y2 V CC V CC
4Y4 GND GND
NC NC NC
logic diagram (positive logic)
1
1OE
47 2
1A1
46 3
1A2
44 5
1A3
43 6
1A4
48
2OE
41 8
2A1
40 9
2A2
38 11
2A3
37 12
2A4
4 5 6
NC 2OE
1A1 1A2
1A3 1A4
2A1 2A2
2A3 2A4
3A2 3A1
3A4 3A3
4A2 4A1
4A4 4A3
NC 3OE
— 78 —
25
3OE
36
1Y1 3A1
35
1Y2
3A2
33
1Y3 3A3
32
1Y4 3A4
24
4OE
30
2Y1 4A1
29
2Y2
4A2
27
2Y3 4A3
26
2Y4 4A4
FUNCTION TABLE
(each 4-bit buffer)
INPUTS
OUTPUT OUTPUT
OE A
L H
L L
H X
13
3Y1
14
3Y2
16
3Y3
17
3Y4
19
4Y1
20
4Y2
22
4Y3
23
4Y4
Y
H
L
Z