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Single-supply muxes suit high-end video products

Posted: 12 Nov 2007 ?? ?Print Version ?Bookmark and Share

Keywords:single-supply muxes? high-end video products? HDTV?


Intersil Corp. has announced two new single-supply, triple 4:1 buffered multiplexers designed for use in high-end consumer video products. The new ICs are the ISL59451, which offers an integrated DC-restore feature, and the ISL59452, which is designed for AC-coupled systems.

The ISL59451 and ISL59452 are the first single-supply, buffered triple 4:1 multiplexers in the industry. This feature set is important for consumer customers designing systems where video input is the only feature requiring a negative rail. By eliminating the need for a negative rail, these ICs will help simplify the design of such products as projectors, HDTVs and broadcast equipment, and will save board space and cost for ODMs.

The ISL59451's integrated DC-restore feature lifts the video signal above ground and into the operating range of the multiplexer, ensuring the video is in the correct voltage range for processing and a high-quality video signal will result. For systems using an AC-coupled design, the ISL59452 is offered without the integrated DC-restore feature and at a slightly lower price. Using these parts, customers can choose between AC or DC coupling video into the 0 to 5V range, while maintaining the excellent video characteristics from the multiplexer that are usually associated with 5V performance.

These parts can also be used as an input stage, where multiple channels of video are coming into a device (such as a projector) but only one channel needs to be selected at any one time.

The ISL59451 is available in 32 Ld 5x5 QFN packaging in quantities of 100-999 for $6.49. The ISL59452, offered in the same packaging and quantities, is priced at $4.88.

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