MAX4399CTK+TD

The MAX4399CTK+TD by Analog Devices is an audio/video switch ideal for digital set-top box applications. It provides video and audio routing from an MPEG decoder source to TV, VCR, and AUX SCART connectors.

This device features a programmable audio gain control ranging from -56dB to +6dB and clickless audio switching for the TV audio channel. It can also mix an auxiliary audio tone into the TV audio or mix stereo audio into a mono signal. The MAX4399 directly drives an external RF modulator with a composite video signal (CVBS).

With an I2C-compatible 2-wire interface supporting data rates up to 400kbps, the MAX4399 operates with standard +5V and +12V single supplies. It supports both slow and fast switching. All video and audio inputs are AC-coupled, and DC biases are set to predefined levels. Video outputs, including the RF modulator, drive standard 150Ω loads. RGB outputs have a programmable gain of +6dB ±1dB, while other video outputs have a fixed +6dB gain. VCR and AUX audio output gains are programmable for -6dB, 0dB, and +6dB.

The MAX4399 is available in a compact 68-pin thin QFN package and is specified for the 0°C to +70°C commercial temperature range. Its features include a low -86dB video signal-to-noise ratio and a 27MHz -3dB large-signal bandwidth on all video drivers.