I2C BUS Sound Processor for TV
CXA2021S
I2C BUS Sound Processor for TV
Description The CXA2021S is a bipolar IC developed as an I2C BUS control sound p...
Description
CXA2021S
I2C BUS Sound Processor for TV
Description The CXA2021S is a bipolar IC developed as an I2C BUS control sound processor for TV. This IC implements surround, tone control, balance, volume, mute and AGC functions. Features I2C BUS control The AGC circuit is adopted to absorb volume differences between input sources and improve the S/N ratio in hearing. Absolute Maximum Ratings Supply voltage VCC 14 V Operating temperature Topr –20 to +75 °C Storage temperature Tstg –65 to +150 °C Allowable power dissipation PD 0.9 W Recommended Operating Condition Supply voltage 8 to 13 22 pin SDIP (Plastic)
Structure Bipolar silicon monolithic IC Applications TVs
V
Pin Configuration
LOUT CH-L DET1 CL-L HPO SDA
12 11
VRS
L-IN
Vcc
HPI
PS
22
21
20
19
18
17
16
15
14
13
1
2
3
4
5
6
7
8
9
10
CL-R
BAL
VOL
ROUT
GND
BASS
CH-R
TRE
DET2
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R-IN
–1–
SCL
E95319-ST
CXA2021S
Block Diagram
I2C BUS SOUND PROCESSOR Surround Vcc L = L – (L – R) × 1 – SCR 1 + SCR 1 – SCR 1 + SCR R = 18K
150Hz HPF DET1 16 17 13 DET2 10 21
CH-L
CL-L
R = R + (L – R) ×
19
20
AGC DET 1...
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