Sound Processor IC
BH3878KS2
Description Dimension (Units : mm)
Features
00W025A
May, 2001
Absolute Maximum Ratings (Ta=25˚C)
Applications
Power supply voltage
Power dissipation
Operating temperature range
Storage temperature range
Parameter Symbol Limits Unit
Vcc
Pd
Topr
Tstg
10.0
1200
+70
+125
–20
–55
~
~
mW
˚C
˚C
V
Power supply voltage Vcc 98.5 9.5 V
Recommended Operating Conditions (Ta=25˚C)
Parameter Min. Max. UnitTyp.Symbol
*
*Derating : 12.0mW/˚C for operation above Ta=25˚C
BH3878KS2 is a sound controller IC for mini component
stereo. 5-channel input selector, vocal fader, volume,
surround, 5-band graphic equalizer, dynamic bass, and
5-band spectrum analyzer are all integrated into this single
chip. Switching noise is reduced when volume, vocal fader,
surround and dynamic bass are changed by soft switch.
1) All in one chip IC incorporating functions of volume, tone,
and spectrum analyzer.
2) Soft switching that can reduce the stepping switching noise
when volume, mode selector, surround, dynamic bass and
the gain of graphic equalizer are switched.
3) 5-channel input selector, mode selector, volume, surround
graphic equalizer, dynamic bass, and spectrum analyzer
can be controlled by serial control from micro controller.
4) Built-in matrix surround, B.P.F for spectrum analyzer.
5) Low distortion, low noise by BiCMOS process using
resistance ladder type volume.
6) Mode of dynamic bass and bi-amplifier can be switched.
Mini component stereo, micro component stereo, CD radio cassette player, TV
SQFP-T64
49
64
1
.
4
–
0
.
1
0
.
1
1
4
.
0
–
0
.
3
1
2
.
0
–
0
.
2
0.3–0.10.65
1
17
16
32
0.125–0.1
0. 15
0
.
5
12.0–0.2
14.0–0.3
48 33