CXA2074Q

CXA2074Q/S US Audio Multiplexing Decoder Description The CXA2074Q/S 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 while adjustment, mode control and sound processor control are all executed through I2C BUS. Features Audio multiplexing decoder, dbx noise reduction decoder and sound processor 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 parts. There are three systems for inputs and two systems for outputs, and each mode control is possible. Standard I/O Level [( ) is the pin No. for the CXA2074S.] Input level COMPIN (Pin 17) 245mVrms AUX1-L/R (Pins 36 and 35) 490mVrms AUX2-L/R (Pins 38 and 37) 490mVrms Output level LPOUT-L/R (Pins 40 and 39) 490mVrms LSOUT-L/R (Pins 8 and 7) 490mVrms CXA2074Q 48 pin QFP (Plastic) CXA2074S 42 pin SDIP (Plastic) 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 0.6 (48 pin QFP) W 2.2 (42 pin SDIP) W Range of Operating Supply Voltage 9 ± 0.5 V Applications TV, VCR and other decoding systems for US a...