1
Video ICs
Dual-line serial control sound
processor IC
BH3866AS
The BH3866AS is a signal processing IC developed for the control of volume and tone quality in TV equipment.
Since dual-line serial control (I
2
C 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.
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Applications
DVDs, personal computers, high-vision TVs, karaoke sets, digital broadcasts, CATVs, and other TV equipment
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Features
1) 3-channel volume and sound quality control (for
stereo and center speakers).
2) Absorption of volume deviation between input
sources and improved S / N ratio, for better sound
quality, using an AGC circuit.
3) Control through I
2
C BUS serial control.
4) Internal pseudo-stereo circuit provides phase-shift
matrix surround effect.
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Recommended operating conditions (Ta = 25°C)
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Absolute maximum ratings (Ta = 25°C)
Parameter Symbol Min. Typ. Max. Unit
Power supply voltage VCC 7.0 — 9.5 V
Parameter Symbol Limits Unit
Power supply voltage VCC 10.0 V
Power dissipation 1250
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mW
Operating temperature Topr °C
Storage temperature Tstg °C
Pd
– 25 ~ + 75
– 55 ~ + 125
*
Reduced by 12.5mW for each increase in Ta of 1°C over 25°C.