LG LM-M1030A Service Manual page 51

3cd changer hi-fi system
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I BU2090F (IC501)
12-bit, Serial IN, Parallel OUT driver
Block diagram
PIN DESCRIPTION
Pin No.
BU2090/F/FS
BU2092/F
1
2
3
-
4
5
6
7
8
9
10
-
-
11
12
13
14
15
-
16
Vss
1
DATA
2
12-bit shift register
CLOCK
3
Q0
4
Q1
5
Q2
6
Q3
7
Q4
8
BU2092/FV
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
9
9
10
10
11
11
-
12
-
13
12
14
13
15
14
16
15
17
16
18
17
19
18
20
16
Control circuit
15
14
Latch
13
Output buffer
(open drain)
12
11
10
9
Pin name
Vss
GND
DATA
Serial data input
CLOCK
Data shift clock input
LCK
Data latch clock input
Q0
parallel data output
Q1
parallel data output
Q2
parallel data output
Q3
parallel data output
Q4
parallel data output
Q5
parallel data output
Q6
parallel data output
N.C.
Not connected
N.C.
Not connected
Q7
parallel data output
Q8
parallel data output
Q9
parallel data output
Q10
parallel data output
Q11
parallel data output
OE
Output Enable
V
Power supply
DD
- 2-54 -
V
DD
Q11
Q10
Q9
Q8
Q7
Q6
Q5
Function

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