Crystal recommendation for ESP32-U4DWH

nullbert
Posts: 11
Joined: Sun May 29, 2022 5:31 pm

Crystal recommendation for ESP32-U4DWH

Postby nullbert » Sun May 29, 2022 5:40 pm

Hi - I am currently designing a baseboard for the ESP32-U4DWH.

I'm looking for guidelines / recommended part numbers for the 40MHz crystal. I've looked in the hardware design guide and didn't see any specifications for the crystal and capacitors.

Please advise what I should be looking for in the crystal specs; suggested part numbers are welcome.

Thank you very much!

ESP_Sprite
Posts: 9589
Joined: Thu Nov 26, 2015 4:08 am

Re: Crystal recommendation for ESP32-U4DWH

Postby ESP_Sprite » Mon May 30, 2022 3:00 am

It needs to be 40MHz and <10ppm, otherwise it's unconstrained. Capacitors depends on the internal capacitance of the crystal and your PCB layout, Adafruit has a nice bit of text about that.

nullbert
Posts: 11
Joined: Sun May 29, 2022 5:31 pm

Re: Crystal recommendation for ESP32-U4DWH

Postby nullbert » Tue May 31, 2022 2:31 am

Thank you very much for the quick reply!

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