US Audio Multiplexing Decoder
The CXA2104S 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. Various kinds of
filters are built in while adjustment and mode control
are all executed through I2C BUS.
30 pin SDIP (Plastic)
• Adjustment free of VCO and filter.
• 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
• There is an additional SAP output.
Standard I/O Level
• Input level
COMPIN (Pin 11) 100mVrms
245mVrms (Selected by INSW)
• Output level
TVOUT-L/R (Pins 2 and 1)
Pin Configuration (Top View)
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
TV, VCR and other decoding systems for US audio
multiplexing TV broadcasting
Bipolar silicon monolithic IC
∗ A license of the dbx-TV noise reduction system is
required for the use of this device.
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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.