<div dir="ltr"><div>Have you verified that your microcontroller doesn't already have internal clamp diodes on its input pins?</div><div><br></div><div>(some do... AVR I think, and maybe PIC? Though the supply voltage you mentioned elsewhere hints that you're not using AVR)<br></div><div><br></div><div>John<br></div></div><div class="gmail_extra"><br><div class="gmail_quote">On 20 June 2018 at 05:52, Tim Ressel <span dir="ltr"><<a href="mailto:timr@circuitabbey.com" target="_blank">timr@circuitabbey.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hi,<br>
<br>
I am forever duplicating a circuit for protecting processor inputs: a series current limiting resistor, a pair of schottky diodes for clamping to ground and pos rail, and sometimes a schmitt trigger buffer. Is there a single component that does this?<span class="HOEnZb"><font color="#888888"><br>
<br>
-- <br>
--Tim Ressel<br>
Circuit Abbey<br>
<a href="mailto:timr@circuitabbey.com" target="_blank">timr@circuitabbey.com</a><br>
<br>
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