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PDF BH3865S Data sheet ( Hoja de datos )
| Número de pieza | BH3865S | |
| Descripción | Dual Line Serial Control Sound Processor IC | |
| Fabricantes | ROHM Semiconductor | |
| Logotipo |  |
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Video ICs
Dual-line serial control sound
processor IC
BH3865S
BH3865S
The BH3865S is a signal processing IC developed for the control of volume and tone quality in TV equipment.
Since dual-line serial control (I2C BUS) is used, the volume level and tone quality in TV equipment can be changed using
signals such as those from a microcomputer or similar device.
Note : I2C BUS is a registered trademark of Philips.
!Applications
DVDs, personal computers, high-vision TVs, karaoke sets, digital broadcasts, CATVs, and other TV equipment
!Features
1) 2-channel volume and sound quality control.
2) Absorption of volume deviation between input sources and improved S / N ratio, for better sound quality, using an
AGC circuit.
3) Control through I2C BUS serial control.
4) Internal pseudo-stereo circuit provides phase-shift matrix surround effect.
!Absolute maximum ratings (Ta = 25°C)
Parameter
Symbol
Limits
Power supply voltage
Power dissipation
VCC
Pd
10.0
1250∗
Operating temperature
Topr
−25~+75
Storage temperature
Tstg
−55~+125
∗Reduced by 12.5mW for each increase in Ta of 1˚C over 25˚C.
Unit
V
mW
°C
°C
!Recommended operating conditions (Ta = 25°C)
Parameter
Power supply voltage
Symbol
VCC
Min.
7.0
Typ.
-
Max.
9.5
Unit
V
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Video ICs
Pin No. Pin name Pin voltage ZIN I / O
VCC
Equivalent circuit
9 STB
25 STT
- 30k -
30k
GND
DAC
VCC
10 RT
4.5V 30k
-
24 LT
GND
VCC
30k
1
2
VCC
11 RB
4.5V 30k
-
23 LB
GND
VCC
30k
1
2
VCC
13 SRV
14 SLV
- 30k -
GND
30k
DAC
BH3865S
Function
Integration pins that prevent
shock sound when switching
the bass and treble levels.
Treble filter pins for the left
and right channels.
Bass filter pins for the left
and right channels.
Integration pins that prevent
shock sound when switching
the volume levels on the left
and right channels.
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Video ICs
BH3865S
Slave address
MSB
LSB
10000010
Parameter
I2C BUS
Symbol
SW NO.
Selected address / data
Measurement
1 2 3 4 5 6 7 8 9 10 11 0 0 0 1 0 2 0 3 0 4 0 5 0 6 point
Total harmonic distortion, Rch THDR 1 1 2 1 2 1 1 1 0 0 F F
2020000C C
Total harmonic distortion, Lch THDL 1 1 1 2 1 2 1 1 F F 0 0
2020000C C
Output noise voltage, Rch
VNOR 1 1 1 1 2 1 1 1 0 0 F F
2020000C B
Output noise voltage, Lch
VNOL 1 1 1 1 1 2 1 1 F F 0 0
2020000C B
Residual noise voltage, Rch VMNOR 1 1 1 1 2 1 1 1 0 0 0 0
2020000C B
Residual noise voltage, Lch VMNOL 1 1 1 1 1 2 1 1 0 0 0 0
2020000C C
Crosstalk, Rch→Lch
CTR-L 1 1 2 1 1 2 1 1 F F F F
2020000C B
Crosstalk, Lch→Rch
CTL-R 1 1 1 2 2 1 1 1 F F F F
2020000C B
Input impedance, Rch
RINR 1 2 2 1 1 1 1 1 0 0 0 0
2020000C A
Input impedance, Lch
RINL 1 2 1 2 1 1 1 1 0 0 0 0
2020000C A
Output impedance, Rch
ROUTR 1 1 1 1 2 1 2 1 0 0 0 0
2020000C D
Output impedance, Lch
ROUTL 1 1 1 1 1 2 2 1 0 0 0 0
2020000C D
Ripple rejection, Rch
RRR 2 1 1 1 2 1 1 1 0 0 F F
2020000C B
Ripple rejection, Lch
RRL 2 1 1 1 1 2 1 1 F F 0 0
2020000C B
Muting level, Rch
VMUTER 1 1 2 1 2 1 1 1 F F F F
2020000E B
Muting level, Lch
VMUTEL 1 1 1 2 1 2 1 1 F F F F
2020000E B
Volume attenuation, Rch
ATTMAXR 1 1 2 1 2 1 1 1 0 0 0 0
2020000C B
Volume attenuation, Lch
Channel balance 1, Rch→Lch
Channel balance 2, Rch→Lch
Bass boost gain, Rch
ATTMAXL 1 1 1 2
CB1R-L 1 1 2 2
CB2R-L 1 1 2 2
VBMAXR 1 1 2 1
12
2/ 1/
12
2/ 1/
12
21
11
11
11
11
0000
FFFF
3333
00FF
2 0 2 0 0 0 0C
2 0 2 0 0 0 0C
2 0 2 0 0 0 0C
7 F 2 0 0 0 0C
B
B
B
B
Bass boost gain, Lch
VBMAXL 1 1 1 2 1 2 1 1 F F 0 0
7F20000C B
Bass cut gain, Rch
VBMINR 1 1 2 1 2 1 1 1 0 0 F F
0020000C B
Bass cut gain, Lch
VBMINL 1 1 1 2 1 2 1 1 F F 0 0
0020000C B
Treble boost gain, Rch
VTMAXR 1 1 2 1 2 1 1 1 0 0 F F
207F000C B
Treble boost gain, Lch
VTMAXL 1 1 1 2 1 2 1 1 F F 0 0
207F000C B
Treble cut gain, Rch
VTMINR 1 1 2 1 2 1 1 1 0 0 F F
2000000C B
Treble cut gain, Lch
VTMINL 1 1 1 2 1 2 1 1 F F 0 0
2000000C B
AGC input / output level 1, Rch VAGC1R 1 1 2 2 2 1 1 1 F F F F
20200001 B
AGC input / output level 1, Lch VAGC1L 1 1 2 2 1 2 1 1 F F F F
20200001 B
AGC input / output level 2, Rch VAGC2R 1 1 2 2 2 1 1 1 F F F F
20200001 B
AGC input / output level 2, Lch VAGC2L 1 1 2 2 1 2 1 1 F F F F
20200001 B
AGC input / output level 3, Rch VAGC3R 1 1 2 2 2 1 1 1 F F F F
20200001 B
AGC input / output level 3, Lch VAGC3L 1 1 2 2 1 2 1 1 F F F F
20200001 B
AGC input / output level 4, Rch VAGC4R 1 1 2 2 2 1 1 1 F F F F
20200001 B
AGC input / output level 4, Lch VAGC4L 1 1 2 2 1 2 1 1 F F F F
20200001 B
Total harmonic distortion at AGC on, Rch THDAGCR 1 1 2 2 2 1 1 1 F F F F
20200001 C
Total harmonic distortion at AGC on, Lch THDAGCL 1 1 2 2 1 2 1 1 F F F F
20200001 C
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