Most Intel ethernet controllers supports the use of an oscillator in place of a crystal as clock source. This includes the XL710 10GbE controller.
The datasheet for the X550 does not mention this option. Can an oscillator be used? Any guidance would be appreciated!
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You can use the device that you have mentioned, just assure it meets the electrical parameters stated in the Crystal requirements in section 12.6, on page 1096 of the https://www.intel.com/content/dam/www/public/us/en/documents/datasheets/ethernet-x550-datasheet.pdf Intel(R) Ethernet Controller X550 Datasheet document # 333369. You can confirm this information and more details in the Checklist X550-AT2 tab, specifically in the Connect clock signals to external rows of the https://cdrdv2.intel.com/v1/dl/getContent/557651 Intel(R) X550-AT2 10 GbE Controller [Sageville] Design In Checklist document # 557651.
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