Using an CL 18pF Crystal on the NRF52https://devzone.nordicsemi.com/f/nordic-q-a/97703/using-an-cl-18pf-crystal-on-the-nrf52Hello, We are working on a product using the NRF52832 series part and in our application we need to use a ruggedized 32MHz Crystal because the end product is molded at pressures that will destroy a normal AT type can crystal. The issue is thaten-USTelligent Community 13Thu, 23 Mar 2023 18:23:17 GMTRE: Using an CL 18pF Crystal on the NRF52https://devzone.nordicsemi.com/thread/417216?ContentTypeID=1Thu, 23 Mar 2023 18:23:17 GMT137ad170-7792-4731-bb38-c0d22fbe4515:abf96574-fb71-4b89-9da6-25fcb98c4f41Eric<p>Thanks for the help!</p><div style="clear:both;"></div>RE: Using an CL 18pF Crystal on the NRF52https://devzone.nordicsemi.com/thread/415533?ContentTypeID=1Wed, 15 Mar 2023 15:22:29 GMT137ad170-7792-4731-bb38-c0d22fbe4515:a917961f-4d9b-43f1-bed0-23749f5b4012ketiljo<p>You need to calculate the load caps as follows:&nbsp;</p> <p>Ccap = CL *2 - Cpin, where Cpin = 4 pF</p> <p>For a crystal with CL = 18 pF, you need 33 pF load caps. Using smaller caps will pull the frequency out of spec. It may work, but this much off isn&#39;t good.</p> <p>Max CL value the oscillator is designed for is 12 pF over temperature and voltage. More than this, you risk that the oscillator either starts too slow or not at all at some temperatures or voltages.&nbsp;</p><div style="clear:both;"></div>