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Home » Publications » Industry magazines » Engineering magazines » EDN Asia » July 2007 »
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    MLA

    Hageman, Steve. "Digital-I/O circuit adapts to many interface voltages.(design ideas)." EDN Asia. Canon Communications L.L.C. 2007. HighBeam Research. 19 Apr. 2018 <https://www.highbeam.com>.

    Chicago

    Hageman, Steve. "Digital-I/O circuit adapts to many interface voltages.(design ideas)." EDN Asia. 2007. HighBeam Research. (April 19, 2018). https://www.highbeam.com/doc/1G1-169086297.html

    APA

    Hageman, Steve. "Digital-I/O circuit adapts to many interface voltages.(design ideas)." EDN Asia. Canon Communications L.L.C. 2007. Retrieved April 19, 2018 from HighBeam Research: https://www.highbeam.com/doc/1G1-169086297.html

    Please use HighBeam citations as a starting point only. Not all required citation information is available for every article, and citation requirements change over time.

Digital-I/O circuit adapts to many interface voltages.(design ideas)

EDN Asia
EDN Asia

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July 1, 2007 | Hageman, Steve | Copyright
COPYRIGHT 2009 Reed Business Information, Inc. (US). This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights or concerns about this content should be directed to Customer Service.
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    <a href="https://www.highbeam.com/doc/1G1-169086297.html" title="Digital-I/O circuit adapts to many interface voltages.(design ideas) | HighBeam Research">Digital-I/O circuit adapts to many interface voltages.(design ideas)</a>

To test products in my R&D lab, I build many universal data-acquisition systems that connect to a PC or another controller through RS-232 links or LANs. These small systems typically include multiple ADC, DAC, and digital-I/O channels to control various hardware functions during product design and development. Over the years, I have established a simplified analog-interface standard that spans a 0 to 5V range. On the digital side, many of the newer logic families no longer tolerate 5V inputs and have rendered 5V-only digital-I/O ports obsolescent.

To solve the problem, I designed a flexible digital-interface circuit around a MAX7301 I/O expander from Maxim Integrated Products (www. …


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