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Http://www.st.com/resource/en/datasheet/stm32f051t8.pdf UFBGA-100, 12x12 raster, 7x7mm package, pitch 0.4mm; see section 6.3 of http://www.st.com/resource/en/datasheet/stm32f103ze.pdf Lattice caBGA-381 footprint for the Adafruit Feather 32u4 FONA Footprint for Mini-Circuits case TTT167 (Mini-Circuits_TTT167_LandPatternPL-079) following land pattern drawing: https://ww2.minicircuits.com/pcb/98-pl094.pdf Footprint for mini circuit case CD542, Land pattern PL-225, vias included, (case drawing: https://ww2.minicircuits.com/case_style/CD542.pdf, land pattern PL-035, including GND-vias (https://www.minicircuits.com/pcb/98-pl258.pdf Footprint for Mini-Circuits case CK605 (https://ww2.minicircuits.com/case_style/CK605.pdf Footprint for Mini-Circuits case GP731 (https://ww2.minicircuits.com/case_style/GP731.pdf Footprint for Mini-Circuits case QQQ130 (https://ww2.minicircuits.com/case_style/QQQ130.pdf) following.

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