EMI specialist PulseCore Semiconductor’s USB 2.0 Peak EMI Reduction IC has tapped spread spectrum technology to achieve USB compliance. As a result, designers and systems engineers now have the option of using spread spectrum clocking to reduce electromagnetic interference (EMI) in USB devices, said PulseCore.

According to PulseCore, it's patent-pending USB 2.0 Peak EMI Reduction IC (PCS3P73U00A) greatly simplifies EMI reduction while reducing or eliminating the need for expensive metal shielding, ferrite beads, conductive paint, filtering networks and other costly, space-consuming alternatives.

Until now, however, spread spectrum clocking was thought to be impossible in USB devices because of the exceptionally tight timing and frequency domain limits imposed by USB compliance standards and tests. PulseCore' said that USB 2.0 Peak EMI Reduction IC overcomes these obstacles through extremely fine spread spectrum granularity and control.

"PC motherboards typically incorporate spread spectrum on six or more different clocks, but not on the USB clock," said Steve Kao, vce pesident of worldwide sales and marketing at PulseCore. "USB 2.0 Peak EMI Reduction for the first time allows USB system designers the option of reducing EMI through spread spectrum clocking."

The PCS3P73U00A operates from a 3.3V/2.5V supply and is available in an 8 pin TSSOP, SOIC and TDFN (2 x 2) COL packages over a commercial temperature range. USB 2.0 Peak EMI Reduction IC samples are available now. And, in quantities of 3000, it is priced at $0.95

www.pulsecoresemi.com

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