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SCART saves power in STBs, A/V receivers

Posted: 20 Nov 2008 ?? ?Print Version ?Bookmark and Share

Keywords:power consumption? A/V receiver?

Maxim Integrated Products introduces the MAX9597, a fully integrated, +3.3V SCART solution for set-top boxes and A/V receivers that have one SCART connector. Designed to enable greener consumer applications, this device utilizes innovative, power-saving technology to reduce power consumption, claim Maxim. The company's patented DirectDrive technology enables the device to operate audio and video signals from +3.3V, that eliminates the need for a +5V supply and minimizes the use of a +12V supply. This low-voltage operation, combined with the MAX9597's 53mW quiescent current consumption, makes it much easier to meet stringent energy-efficiency requirements for set-top boxes.

With DirectDrive, the DC bias of the audio-line outputs is always at ground, regardless of whether the MAX9597 is being powered up or powered down. DirectDrive circuitry eliminates the need for AC-coupling capacitors on the audio outputs to save board space, reduce system cost, and improve frequency response.

The MAX9597 eases the routing of audio and video signals between an MPEG encoder and an external SCART connector. It integrates standard-definition video filters on all video-encoder inputs, and all audio drivers deliver a full-scale (2.0Vrms, min) output. The audio section contains left and right audio paths with an independent operational amplifier at the inputs. The MAX9597 is controlled through an I2C-compatible interface.

The MAX9597 operates from standard +3.3V and +12V power supplies. It is available in a compact, 5mm x 5mm, 28-pin TQFN package, is fully specified over the 0C to +70C commercial temperature range. Prices start at $0.90 for 1000-up (FOB USA).

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