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QFN-32 for Nordic chips

KiCad Bot requested to merge github/fork/jcyrax/Nordic_QFN-32_EP3.55 into master

Created by: jcyrax

Footprint for nRF52810-QCxx symbol. http://infocenter.nordicsemi.com/pdf/nRF52810_PS_v1.1.pdf image image image

The source I used is demo board gerbers, but with larger EP. My EP is 3.55x3.55 I got using IPC calculation formula from here: https://github.com/KiCad/kicad-symbols/pull/340#issuecomment-370405440 Nordic gerbers use 3.5x3.5mm EP. EP of package is 3.5 (+/-) 0.1

Nordic comments on footprints: https://devzone.nordicsemi.com/f/nordic-q-a/19860/qfn-land-pattern-in-reference-design/77244#77244

Thanks for creating a pull request to contribute to the KiCad libraries! To speed up integration of your PR, please check the following items:

  • Provide a URL to a datasheet for the footprint(s) you are contributing
  • An example screenshot image is very helpful
  • If there are matching symbol or 3D model pull requests, provide link(s) as appropriate
  • Check the output of the Travis automated check scripts - fix any errors as required

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