BD3870FS ROHM Co. Ltd., BD3870FS Datasheet - Page 6

• Manufacturer Part Number: BD3870FS
• Description: Audio Sound Processor For Home Audio
• Manufacturer: ROHM Co. Ltd.

●Block diagram, application circuit, pin assignment (BD3870FS, BD3871FS, BD3873FS)
●Pin description (BD3870FS, BD3871FS, BD3873FS)
Pin No.
10
12
11
1
2
3
4
5
6
7
8
9
Pin Name
FILTER
SEL2
SEL1
VIN1
VIN2
GND
A1
A2
B1
B2
C1
C2
0dB
～
-87dB
-∞
0.33μ
24
Vcc/2
1
1ch volume input pin
2ch volume input pin
2ch input selector output pin
1ch input selector output pin
1ch input pin A
2ch input pin A
1ch input pin B
2ch input pin B
1ch input pin C
2ch input pin C
1/2 VCC pin
Ground pin
0.0022μ 0.0022μ
Treble1
fc=8kHz
23
Vcc/2
2
Treble２
fc=8kHz
22
10μ
10μ
3
Description
0.1μ
21
4
f
0
390k
Bass2
=80Hz
0.1μ 0.1μ
5.6k
20
A1
5
10μ
50k
A2
19
6
10μ
f
0
50k
390k
Bass1
=80Hz
0.1μ
18
5.6k
B1
6/16
7
10μ
50k
Fig.2
OUT1
Pin No.
B2
17
8
10μ
10μ
13
14
15
16
17
18
19
20
21
22
23
24
50k
OUT2
16
C1
9
Vcc/2
10μ
10μ
50k
4.7k
Pin Name
VCC
15
10
C2
BOUT1
BOUT2
OUT2
OUT1
BNF1
BNF2
TNF2
TNF1
10μ
VCC
CAP
50k
SC
4.7k
SI
LATCH
DATA
Vcc/2
14
11
Logic
47μ
CLOCK
Serial clock input pin
Serial data input pin
Power supply pin
1ch output pin
1ch bass filter setting pin
2ch bass filter setting pin
1ch treble filter setting pin
Time constant setting pin for
absorbing
shock sound
2ch output pin
1ch bass filter setting pin
2ch bass filter setting pin
2ch treble filter setting pin
13
12
Vcc/2
Unit: Resistance =Ω, Capacitor = F
Description
surround
switching