https://devzone.nordicsemi.com/f/nordic-q-a/16537/nnf52832-hf-xtalPer table 19.4.2 in the nRF52 PS v 1.1: , what is the difference between CL (load cap) and C0 (shunt cap)? The max ESR is specified for C0 but not CL. The xtal datasheets specify CL. So how can I be sure that the ESR of the chosen xtal meets the datasheeten-USTelligent Community 13Wed, 21 Sep 2016 01:25:37 GMThttps://devzone.nordicsemi.com/thread/63279?ContentTypeID=1Wed, 21 Sep 2016 01:25:37 GMT137ad170-7792-4731-bb38-c0d22fbe4515:d28603dc-cb0d-459e-ad79-82a1221c26c5Tosa<p>You are correct; the datasheets do specify C0. Unfortunately it seems that ECS-320-8-47-JTN-TR does not meet the spec since it has ESR=100ohm and C0=5pF. However, the US3200005Z seems to meet spec. These both come in a small 1.6mm x 1.2mm package; the other two are bigger.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/63278?ContentTypeID=1Tue, 20 Sep 2016 06:44:59 GMT137ad170-7792-4731-bb38-c0d22fbe4515:531d0b23-2cba-4f6d-ba76-24d0926a847fEinar Thorsrud<p>Both the load capacitance (CL) and shunt capacitance (C0) are specified in the datasheets of the crystals. The C0 is the capacitance between the electrodes that connect the quartz crystal to the package. The CL is the external circuit capacitance in parallel with the crystal. <a href="https://www.maximintegrated.com/en/app-notes/index.mvp/id/726">This page</a> has a good overview of how crystals are specified.</p> <p>You should compare the crystals you are considering with the requirements in the nRF52 <a href="http://infocenter.nordicsemi.com/topic/com.nordic.infocenter.nrf52832.ps.v1.1/clock.html?cp=2_2_0_18_3_1#unique_1864481750">crystal oscillator spec</a>, and as long as it matches the requirements, it should be OK. From what I can see the crystals you have listed should be OK.</p><div style="clear:both;"></div>