00W025A
Sound Processor IC
BH3878KS2
Description
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.
Features
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.
Applications
Mini component stereo, micro component stereo, CD radio cassette player, TV
Absolute Maximum Ratings (Ta=25˚C)
Parameter
Power supply voltage
Power dissipation
Operating temperature range
Storage temperature range
∗
Derating : 12.0mW/˚C for operation above Ta=25˚C
Symbol
Vcc
Pd
Topr
Tstg
Limits
10.0
1200
∗
–
20
~
+
70
Unit
V
mW
Dimension (Units : mm)
14.0±0.3
12.0±0.2
48
33
14.0±0.3
12.0±0.2
49
32
0.5
0.125±0.1
0. 15
64
1
0.65
16
17
1.4±0.1
0.1
0.3±0.1
SQFP-T64
–
55
~
+
125
˚C
˚C
Recommended Operating Conditions (Ta=25˚C)
Parameter
Power supply voltage
Symbol
Vcc
Min.
8.5
Typ.
9
Max.
9.5
Unit
V
May, 2001
LSI [ LSI COMPUTER SYSTEMS ]
