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With thermal vias; see section 6.3 of http://www.st.com/resource/en/datasheet/stm32f100v8.pdf TFBGA-100, 10x10 raster, 10x10mm package, pitch 0.5mm; see section 7.1 of http://www.st.com/resource/en/datasheet/stm32f410t8.pdf WLCSP-49, 7x7 raster, 3.141x3.127mm package, pitch 0.4mm; https://www.latticesemi.com/view_document?document_id=213 UCBGA-49, 7x7 raster, 2.965x2.965mm package, pitch 0.65mm UFBGA-32, 6x6, 4x4mm package, pitch 0.4mm.

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