Maxim's MAX4399 triple SCART audio/video switch for digital set-top boxes and DVD+R/W applications provides audio and video routing from the digital encoder to the TV, VCR, and AUX SCART connectors. The audio channel features clickless switching and programmable volume control from -56 dB to +6 dB in 2 dB steps. The device mixes an auxiliary audio tone into the TV audio channel and the stereo audio signal into a mono audio signal. The MAX4399 directly drives an external RF modulator with a composite video with blanking and sound (CVBS) signal created by an on-chip luma/chroma (Y/C) mixer. It operates on 5 and 12 V single supplies and all inputs are AC-coupled. DC biases of all inputs and output signals are set to predefined levels. All video outputs drive standard 150 y loads. The RGB outputs feature 6dB ±1dB programmable gain while all other video outputs have a 6 dB fixed gain. The gains of the VCR and AUX audio outputs are programmable for -6 dB, 0 dB, and +6 dB.
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