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3.15x3.13mm, 49 Ball, 7x7 Layout, 0.4mm Pitch, https://www.st.com/resource/en/datasheet/stm32wb55vc.pdf ST WLCSP-100, ST die ID 469, 4.02x4.27mm, 81 Ball, 9x9 Layout, 0.5mm Pitch, http://www.ti.com/lit/ds/symlink/tps63000.pdf 3x3mm Body, 0.5mm Pitch (http://www.ti.com/lit/ds/symlink/lm4990.pdf WSON, 12.