HA12215F Datasheet, PDF (7/69 Pages) Hitachi Semiconductor – Audio Signal Processor for Cassette Deck(Dolby B-type NR with Recording System)

Block Diagram
HA12215F
RIN (L)
ALC (L)
BIN (L)
ABO (L)
AIN (L)
GND
V_EE
AIN (R)
ABO (R)
BIN (R)
ALC (R)
RIN (R)
42 41 40 39 38 37 36 35 34 33 32 31 30 29
43
44
NC 45
46
47
48
49
50
51
52
53
NC 54
55
56
EQ
Dolby
B-NR
+ LPF
Dolby
B-NR
EQ
BIAS
−
+
ALC
28
27
MS
26
25
24
23
22
21
20
19
18
17
16
15
1 2 3 4 5 6 7 8 9 10 11 12 13 14
MAOUT
MSIN
MSOUT
LM ON / OFF
REC / PB / PASS
NR ON / OFF
RM ON / OFF
V_CC
BIAS ON / OFF
B NORM / CROM / METAL
NORM / HIGH
A 120 / 70
PB A / B
ALC ON / OFF
Rev.5, Oct. 1999, page 7 of 69