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4.5
BH3874AKS2 (IC434) : Audio sound processor
• Pin Layout
48
49
~
64
1
• Block Diagram
53
55
56
-9dB
INLD
47
INLC
45
11dB
INLB
43
+
-
INLA
41
19dB
+
-
11dB
+
-
INRA
42
INRB
44
INRC
46
INRD
48
-9dB
RECR
52
40
1-44 (No.22041)
~
33
32
~
17
~
16
51
61
62
0~30dB
+
+
+
10K
-
+
L-R
+
-
+
+
L+R
+
10K
+
+
+
10.5Hz
DET
10.5Hz
DET
10.5Hz
DET
10.5Hz
DET
10.5Hz
DET
+
-
22K
59
60
57
58
63 64 3 4 7 8 11 12
15
-30dB~-
+
+
+
5 BAND EQ
5 BAND EQ
-
+
+
MPX
36 37 38 39 1 2 5 6 9 10 13 14 16
17
18
19
23
24
25
26
Vcc
1
-
Vcc
2
+
HPP
+
+
-
VCA
FILTER
+
+
+
-
HPP
DIGITAL
CONTROL
ALC
20 21 22
50
49
30
VCC
28
FILTER
54
GND
32
OUTL
27
BASS5
29
CAP
31
OUTR
35
SCK
34
SI
33
STEPC
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