https://devzone.nordicsemi.com/f/nordic-q-a/39584/nrf52832-i-o-voltageHi, I have nRF52832 connected to a device(A) which can operate from 3.3V to 5V supply. When the device&#39;s supply is 3.3V, it communicates with nRF52832. Before the device&#39;s supply is switched to 5V, I will disable the nRF52832 I/O pins connecteden-USTelligent Community 13Thu, 18 Oct 2018 07:26:23 GMThttps://devzone.nordicsemi.com/thread/153376?ContentTypeID=1Thu, 18 Oct 2018 07:26:23 GMT137ad170-7792-4731-bb38-c0d22fbe4515:3b536867-65e5-4297-9f05-31cdb128e0d1awneil<p>See the&nbsp;<span>nRF52832 datasheet: it tells you&nbsp; the Absolute Maximum voltage at any IO pin:</span></p> <p><span><img src="https://devzone.nordicsemi.com/resized-image/__size/320x240/__key/communityserver-discussions-components-files/4/pastedimage1539847694598v1.png" alt=" " /></span></p> <p>So your <em>design</em> just needs to ensure that you <em><strong>never</strong></em> exceed that!</p><div style="clear:both;"></div>