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USB 2.0 mux interfaces USB, non-USB devices

Posted: 15 May 2007 ?? ?Print Version ?Bookmark and Share

Keywords:USB 2.0 mux? Hi-speed USB? USB interface?

Intersil Corp. has introduced the ISL54200 USB 2.0 Hi-Speed/Full-Speed multiplexer. Promising a wider supply voltage range, higher bandwidth and better insertion loss characteristics than the competition, the company said this device provides the most flexible high-performance solution for interfacing USB and non-USB portable devices.

The ISL54200 is able to switch between data sources having different data speeds and signal levels, and to output them through a common connector. When used inside a portable product such as cellphone, it alternately allows chips with high-speed (480Mbps) USB circuitry and chips with lower speed UART or full-speed (12Mbps) USB to communicate through a single connector. This allows access to slower parts of the cellphone product over a common interface.

In automotive applications where portable products are often placed in a cradle, a common cradle connector can serve multiple portable products with differing data signaling interface requirements while retaining a common USB cable connection to the automobile electronics. And, when used in a laptop docking station it allows a single USB host connection to provide two data ports serving external devices having Hi-Speed or Full-Speed USB signaling capability.

Beyond flexibility, the ISL54200 also promises high performance. The 800MHz bandwidth and superior RON flatness delivers a wider eye opening for improved signal transmission, the company said. The 80nA quiescent supply current significantly lowers the battery drain, while the 2.7-5.5V supply voltage range allows a wider range of rail-to-rail signaling protocols while eliminating the need for an additional LDO power source.

Applications that will benefit from the new device include MP3 and personal media players, cellphones, PDAs, laptop and digicam docking stations, and cradle devices for cellphone, MP3 player and portable automotive or marine GPS devices.

The ISL54200 is available in tape-and-reel quantities of 100-1,000 in a 10-lead ?TQFN package starting at $1.05. The product comes in bulk in a 10-lead TDFN package for $1 and a tape-and-reel 10-lead TDFN for $1.05.

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