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Low current input circuit ideas

Posted: 04 Feb 2009 ?? ?Print Version ?Bookmark and Share

Keywords:circuit input? current low? 6N139?

Advancements in optocoupling and LED technology have given us the 6N139. This unique optocoupler, having an input LED current specification at 500mA, has opened some interesting design doors. Besides the obvious and much written about ability to be directly driven by CMOS circuits, the 6N139 can be considered for signal detection, transient detection, matrices and non-loading line receiving. Following are but a few circuit ideas to stimulate the designer's interest.

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