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2.28x3.092mm package, pitch 0.4mm; see section 7.5 of http://www.st.com/resource/en/datasheet/stm32f446ze.pdf WLCSP-81, 9x9 raster, 4.039x3.951mm package, pitch 0.5mm; see section 7.8 of http://www.st.com/resource/en/datasheet/DM00387108.pdf Texas Instruments, BGA Microstar Junior, 5x5mm, 80 ball 9x9 grid, NSMD pad definition Appendix A BGA 1156 1.

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