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PDF CXA2174S Data sheet ( Hoja de datos )
| Número de pieza | CXA2174S | |
| Descripción | US Audio Multiplexing Decoder | |
| Fabricantes | Sony Corporation | |
| Logotipo |  |
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US Audio Multiplexing Decoder
CXA2174S
Description
The CXA2174S is an IC designed as a decoder for
the Zenith TV Multi-channel System and also
corresponds with I2C BUS. Functions include stereo
demodulation, SAP (Separate Audio Program)
demodulation, dbx noise reduction and sound
processor. Various kinds of filters are built-in this IC.
Adjustment, mode control and sound processor
control are all executed through I2C BUS.
30 pin SDIP (Plastic)
Features
• Alignment-free VCO and filter
• Audio multiplexing decoder
dbx noise reduction decoder
sound processor
— One external input
— Volume control
are all included in a single chip. Almost any sort of
signal processing is possible through this IC.
• Input level, separation adjustments and each mode
control are possible through I2C bus.
Applications
TV, VCR and other decoding systems for US audio
multiplexing TV broadcasting
Structure
Bipolar silicon monolithic IC
Absolute Maximum Ratings (Ta = 25°C)
• Supply voltage
VCC 11 V
• Operating temperature Topr –20 to +75 °C
• Storage temperature
Tstg –65 to +150 °C
• Allowable power dissipation
PD 1.35 W
Range of Operating Supply Voltage
9 ± 0.5
V
∗ A license of the dbx-TV noise reduction system is
required for the use of this device.
Pin Configuration (Top View)
30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
Sony reserves the right to change products and specifications without prior notice. This information does not convey any license by
any implication or otherwise under any patents or other right. Application circuits shown, if any, are typical examples illustrating the
operation of the devices. Sony cannot assume responsibility for any problems arising out of the use of these circuits.
–1–
E00815-PS
1 page  
Pin
No.
Symbol
Pin
voltage
10 PLINT 5.1V
11 COMPIN 4.0V
CXA2174S
Equivalent circuit
20k 20k
VCC
Description
147
20k 20k
10
↓ 20k ↓ 10k
26µ 50µ
24k 24k
VCC
14k 147
11
34k
4V
24k
Pilot cancel circuit loop filter
integrating pin.
(Connect a 1µF capacitor
between this pin and GND.)
Audio multiplexing signal
input pin.
12 VGR
1.3V
11k
3k 147
9.7k 19.4k VCC
× 4 12
2.06k
Band gap reference output
pin.
(Connect a 10µF capacitor
11k 11k between this pin and GND.)
13 IREF 1.3V
VCC
40k
40k 30k
30k 15k
×2
30k
30p 1.8k
6.3k
16k
VCC
13
147
–5–
Set the filter and VCO
reference current. The
reference current is adjusted
with the BUS DATA based on
the current which flows to this
pin.
(Connect a 62kΩ (±1%)
resistor between this pin and
GND.)
5 Page 
CXA2174S
– 11 –
11 Page | ||
| Páginas | Total 29 Páginas | |
| PDF Descargar | [ Datasheet CXA2174S.PDF ] | |
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