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Rise-time accelerator circuit for 2-wire bus applications

Posted: 03 Jun 2009 ?? ?Print Version ?Bookmark and Share

Keywords:accelerator circuit? bus? rise time MAX3373?

Applications that include a 2-wire bussuch as I?C or SMBusnecessitate trade-offs between rise time, power consumption and noise immunity. Because the rise time for low-to-high transitions on such open-drain buses is determined by pull-up resistors and bus capacitance, it is difficult to maintain clean, fast edges as you add peripherals, routing traces and connectors. To address these rise-time problems, this application note presents a rise-time accelerator circuit that offers a simple way to speed rise time, improve noise immunity and minimize power dissipation.

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