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Add 2 QFNs, LFCSP, and WLCSP

evanshultz requested to merge github/fork/evanshultz/add-qfn-lfcsp-wlcsp into master

A few footprints needed by several PRs.

QFN16 and QFN24: https://github.com/KiCad/kicad-symbols/pull/1064 http://www.cypress.com/file/46236/download image

Interestingly, this QFN16 without vias is replacing an existing one. As far as I can tell, the package from the datasheet above and the package from https://www.st.com/resource/en/datasheet/tsv521.pdf are the same (I hope I didn't miss any differences). There was not 0.2mm between the thermal pad and the outer pads so I added some heel reduction to my script entry, which explains the difference.

LFCSP: https://github.com/KiCad/kicad-symbols/pull/1180 https://www.analog.com/media/en/technical-documentation/data-sheets/AD7682_7689.pdf image

WLCSP: https://github.com/KiCad/kicad-symbols/pull/1189#issuecomment-443025084 http://ww1.microchip.com/downloads/en/devicedoc/atmel-8235-8-bit-avr-microcontroller-attiny20_datasheet.pdf#page=208 image

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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