Casio QT 6000 Service Manual - Page 94

ALVCH16245 IC8, logic diagram positive logic, terminal assignments

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2. ALVCH16245 (IC8) 1DIR 1 1B1 2 1B2 3 GND 4 1B3 5 1B4 6 VCC 7 1B5 8 1B6 9 GND 10 1B7 11 1B8 12 2B1 13 2B2 14 GND 15 2B3 16 2B4 17 VCC 18 2B5 19 2B6 20 GND 21 2B7 22 2B8 23 2DIR 24 48 1OE 47 1A1 46 1A2 45 GND 44 1A3 43 1A4 42 VCC 41 1A5 40 1A6 39 GND 38 1A7 37 1A8 36 2A1 35 2A2 34 GND 33 2A3 32 2A4 31 VCC 30 2A5 29 2A6 28 GND 27 2A7 26 2A8 25 2OE terminal assignments 1 2 3 A 1DIR NC NC B 1B2 1B1 GND C 1B4 D 1B6 1B3 VCC 1B5 GND E 1B8 1B7 F 2B1 2B2 G 2B3 2B4 GND H 2B5 J 2B7 2B6 VCC 2B8 GND K 2DIR NC NC NC No internal connection logic diagram (positive logic) 1DIR 1 1A1 47 48 1OE 2 1B1 To Seven Other Channels 4 5 6 NC NC 1OE GND 1A1 1A2 VCC 1A3 1A4 GND 1A5 1A6 1A7 1A8 2A2 2A1 GND 2A4 2A3 VCC 2A6 2A5 GND 2A8 2A7 NC NC 2OE FUNCTION TABLE (each 8-bit section) INPUTS OE DIR OPERATION L L B data to A bus L H A data to B bus H X Isolation - 92 -

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— 92 —
2.
ALVCH16245 (IC8)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
1DIR
1B1
1B2
GND
1B3
1B4
V
CC
1B5
1B6
GND
1B7
1B8
2B1
2B2
GND
2B3
2B4
V
CC
2B5
2B6
GND
2B7
2B8
2DIR
1OE
1A1
1A2
GND
1A3
1A4
V
CC
1A5
1A6
GND
1A7
1A8
2A1
2A2
GND
2A3
2A4
V
CC
2A5
2A6
GND
2A7
2A8
2OE
To Seven Other Channels
1DIR
1A1
1B1
1OE
1
47
48
2
logic diagram (positive logic)
terminal assignments
1
2
3
4
5
6
A
1DIR
NC
NC
NC
NC
1OE
B
1B2
1B1
GND
GND
1A1
1A2
C
1B4
1B3
V
CC
V
CC
1A3
1A4
D
1B6
1B5
GND
GND
1A5
1A6
E
1B8
1B7
1A7
1A8
F
2B1
2B2
2A2
2A1
G
2B3
2B4
GND
GND
2A4
2A3
H
2B5
2B6
V
CC
V
CC
2A6
2A5
J
2B7
2B8
GND
GND
2A8
2A7
K
2DIR
NC
NC
NC
NC
2OE
NC
No internal connection
FUNCTION TABLE
(each 8-bit section)
INPUTS
OPERATION
OE
DIR
OPERATION
L
L
B data to A bus
L
H
A
data to B bus
H
X
Isolation