US Audio Multiplexing Decoder
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The CXA1734S is an IC designed as a decoder
for the Zenith TV Multi-channel System also
corresponds with I2C BUS. Functions include stereo
demodulation, SAP (Separate Audio Program)
demodulation and dbx noise reduction. Various
kinds of filters are built in while adjustment and
mode control are all executed through I2C BUS.
30 pin SDIP (Plastic)
• Audio multiplexing decoder and dbx noise
reduction decoder are all included in a single chip.
Almost any sort of signal processing is possible
through this IC.
• All adjustments are possible through I2C BUS to
allow for automatic adjustment.
• Various built-in filter circuits greatly reduce external
Standard I/O Level
• Input level
COMPIN (Pin 11) 245 mVrms
• Output level
LOUT (Pin 29) 490 mVrms
ROUT (Pin 28) 490 mVrms
Absolute Maximum Ratings (Ta=25°C)
• Supply voltage
• Operating temperature Topr –20 to +75
• Storage temperature Tstg –65 to +150
• Allowable power dissipation
Range of Operating Supply Voltage 9 ± 0.5 V
TV, VCR and other decoding systems for US audio
multiplexing TV broadcasting
Bipolar silicon monolithic IC
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
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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.