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PDF BH3868BFS Data sheet ( Hoja de datos )
| Número de pieza | BH3868BFS | |
| Descripción | Audio sound processor with BBE | |
| Fabricantes | ROHM Semiconductor | |
| Logotipo |  |
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Audio ICs
Audio sound processor with
BH3868BFS
BH3868BFS
∗
R
BH3868BFS is a Audio sound processor IC developed for TV. This IC is built-in volume, balance, tone, surround, BBE
processor and AGC. This IC can be easily controlled by tow-wire serial control (I2C BUS).
∗ BBE is a registered trade mark of BBE Sound Inc.
Note : I2C BUS is a registered trade mark of Philips.
!Applications
Suitable for TV, TV-radio, PC-TV, mini-component and car audio system, etc.
!Features
1) Volume (main volume), balance (right/left), tone (bass and treble), surround (mode and effect), BBE processor (effect)
can be controlled by I2C-BUS.
2) Volume is VCA with low distortion rate and low noise and can restrain the step noise.
3) The reference voltage source is stable, only a few external devices are required because I/O buffer is contained, and
the package is suitable for space-saving design for SSOP-A32.
4) Sound spread can be controlled by the matrix surround and effect adjustment.
5) The built-in AGC circuit can absorb the volume difference between input sources.
6) The contained BBE processor, which reproduce an original sound, controls the effect.
!Absolute maximum ratings (Ta=25°C)
Parameter
Symbol
Limits
Impressed voltage
Power dissipation
VCC 10.0
Pd 850∗
Operating temperature range Topr
−40 to +85
Storage temperature range
Tstg
−55 to +150
∗ When mounted on a glass epoxy board 70mm × 70mm × 1.6mm.
Reduced by 6.8mW for each increase in Ta of 1°C over 25°C.
Unit
V
mW
°C
°C
!Recommended operating conditions (Ta=25°C)
Parameter
Symbol
Min.
Typ.
Power supply voltage
VCC
7.0
−
Max.
9.5
Unit
V
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Audio ICs
Pin. No
Pin name
Terminal
voltage
VCC
Equivalent circuit
6
27
BBASA2
BBASA1
4.5V
6pin
27pin
21.5k
GND
VCC
7
26
BBASB2
BBASB1
4.5V
7pin
26pin
GND
VCC
200
200
8
25
BTREA2
BTREA1
4.5V
8pin
25pin
21.5k
GND
VCC
9
BTREB2
4.5V
9pin
24 BTREB1
24pin
GND
200
200
DataSheet4 U .com
BH3868BFS
Description
Terminal to set a contour
frequency of BBE.
Terminal to set a contour
frequency of BBE.
Terminal to set a process
frequency of BBE.
Terminal to set a process
frequency of BBE.
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Audio ICs
BH3868BFS
Table C Characteristics of the SDA and SCL I/O stages for I2C BUS devices
Parameter
Symbol Min.
Max. Unit
LOW level input voltage :
fixed input levels
VIL −0.5 1.5 V
VDD-related input levels
(−0.5) (0.3 VDD)
HIGH level input voltage :
fixed input levels
VIH 3.0 ∗1 V
VDD-related input levels
(0.7 VDD) (∗1)
Hysteresis of Schmitt trigger inputs :
Fixed input levels
Vhys n/a n/a V
VDD-related input levels
(n/a)
(n/a)
Pulse width of spikes which must be suppressed by
the input filter.
tSP n/a n/a ns
LOW level output voltage (open drain or open collector) :
at 3mA sink current
VOL1 0 0.4 V
at 6mA sink current
(VOL2)
(n/a)
(n/a)
Output fall time from VIH min. to VIL max. with a bus capacitance
from 10pF to 400pF :
with up to 3mA sink current at VOL1
tOF
−
250∗2
ns
with up to 6mA sink current at VOL2
(n/a)
(n/a)
Input current each I/O pin with an input voltage
between 0.4V and 0.9 VDDmax.
II −10 10 µA
Capacitance for each I/O pin.
CI − 10 pF
n/a = not applicable
∗1 maximum VIH=VDDmax. + 0.5V
∗2 Cb=capacitance of one bus line in pF. Note that the maximum tF for the SDA and SCL bus lines quoted in Table B (300ns) is longer
than the specified maximum tOF for the output stages (250ns). This allows series protection resistors (RS) to be connected between
the SDA/SCL pins and the SDA/SCL bus lines as shown in Fig.1 without exceeding the maximum specified tF.
The above-mentioned characteristics are theoretical values based on IC design and the delivery inspection does not guarantee anything.
If any trouble is made, we will take necessary arrangements and actions in our faith.
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