https://devzone.nordicsemi.com/f/nordic-q-a/88696/high-driveI&#39;m considering using the NRF52840 for a device with infrared proximity sensors that requires 8 IR LEDs to be driven at around 14 mA successively (never more than one at a time). Would I be okay sinking current with 8 pins set to high drive, or woulden-USTelligent Community 13Wed, 08 Jun 2022 15:03:53 GMThttps://devzone.nordicsemi.com/thread/371472?ContentTypeID=1Wed, 08 Jun 2022 15:03:53 GMT137ad170-7792-4731-bb38-c0d22fbe4515:099b4388-0fe4-44c2-99eb-f73394681fafhmolesworth<p>14mA in high-drive is fine as <a href="https://devzone.nordicsemi.com/members/ketiljo">ketiljo</a> mentions, however be aware that v1.7 nRF52832 Product Specification has this note (which seems a little over-pessimistic):</p> <p>&quot;<em>To ensure optimal performance, it is not recommended to sink/source more than 15 mA combined from the</em><br /><em>GPIO pins</em>&quot;</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/371434?ContentTypeID=1Wed, 08 Jun 2022 13:34:32 GMT137ad170-7792-4731-bb38-c0d22fbe4515:7ae47a32-c1b7-4439-8b4f-e1f581bc8e87ketiljo<p>14 mA should be ok as long as you don&#39;t drive any other load at the same time. One GPIO can sink or source ~5 mA, but more if the voltage can be lower. If you use only one GPIO pr. LED, you will need a smaller series resistor to compensate for the internal resistance in the GPIO. You can parallel more GPIOs to increase the drive strength.&nbsp;</p><div style="clear:both;"></div>