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Raster, 3.294x3.258mm package, pitch 0.65mm WLP-4, 2x2 raster, 0.73x0.73mm package, pitch 0.4mm; see section 7.2 of http://www.st.com/resource/en/datasheet/stm32f207vg.pdf WLCSP-66, 8x9 raster, 3.767x4.229mm package, pitch 0.4mm; see section 7.4 of http://www.st.com/resource/en/datasheet/stm32l052t8.pdf WLCSP-36, 6x6 raster, 2.61x2.88mm package, pitch 0.4mm; https://www.latticesemi.com/view_document?document_id=213 UFBGA-15, 4x4.

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