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8x8 Layout, 0.4mm Pitch, https://www.st.com/resource/en/datasheet/stm32l412t8.pdf ST WLCSP-49, ST die ID 483, 3.73x4.15mm, 115 Ball, X-staggered 18x10 Layout, 0.4mm Pitch, https://pdfserv.maximintegrated.com/package_dwgs/21-100489.PDF WLCSP-25, 5x5 raster, 2.423x2.325mm package, pitch 0.4mm; see section 6.1 of http://www.st.com/resource/en/datasheet/stm32f103ze.pdf Lattice caBGA-381 footprint for ECP5 FPGAs, based on the mid surdos.

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