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Raster, 4.4084x3.7594mm package, pitch 0.4mm; see section 7.2 of http://www.st.com/resource/en/datasheet/stm32f378vc.pdf WLCSP-72, 9x9 raster, 4.4084x3.7594mm package, pitch 0.4mm; https://www.latticesemi.com/view_document?document_id=213 UCBGA-49, 7x7 raster, 3x3mm package, pitch 0.5mm; see section 7.5 of http://www.st.com/resource/en/datasheet/stm32f446ze.pdf WLCSP-81.

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