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W5500 Crystal Frequency Question

Nigella

Hi, we have a product which uses W5500 as the Ethernet controller. But we are running out of stock of the crystal that connects to pin 30 and 31. We see from the datasheet that the requirement for the crystal is 25MHz. Can we use some other frequency like 24MHz (lower) or 30MHz (higher)?

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    Hi Nigella,

    You'd have to check the datasheet for the W5500 and for your current crystal, it's not just a case of looking at the frequency, you also need to check crystal parameters (in particular load capacitance, but maybe other parameters too such as operational temperature etc). There's a risk of failures in production if you pick a random crystal without trying to match the parameters of the existing crystal. You could order several and have an engineer try them out, perhaps they may want to run other tests on the equipment too?

    Regarding the frequency, it's extremely unlikely you can change the frequency, because the interface from these chips relies on specific frequencies, and 25 MHz is a fixed thing, you can't change it to 24 or 26 MHz and so on.