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Add Texas_VQFN-HR-12_2.0mmx2.5mm

John Beard requested to merge johnbeard/kicad-footprints:add_texas_vqfn_hr_12 into master

Rework of !1422 (closed)

Datasheet: https://www.ti.com/lit/ml/mpqf508/mpqf508.pdf

Original commits, plus:

  • Added to description
  • Modified silk-to-pad clearance to 0.2mm
  • Added thermal vias per datasheet (and a thermal via-less option)
  • Changed pad types to SMD (was Connector)
  • Reduced Courtyard clearance to 0.25
  • Set mask clearance to 0.05 per DS
  • Fixed 3D model prefix

I intended to use the functions in kicad-footprint-generator!895 (merged), but actually the DS values don't agree with the generator when the tolerances are applied, and the vias aren't supported, so I did it manually.

2023-06-25_225704_682x423_screenshot

Known KLC violations:

  • F9.2: mask clearance override (per DS)
  • F7.4: No paste on the thermal vias
  • F7.5: Annular ring on thermal via (else cannot fit DS drill and stay in the pad outline)

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