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Https://www.st.com/resource/en/datasheet/stm32h7a3ai.pdf ST WLCSP-156, ST die ID 472, 4.36x4.07mm, 81 Ball, 9x9 Layout, 0.5mm Pitch, http://www.ti.com/lit/ds/symlink/txb0104.pdf, http://www.ti.com/lit/an/snva009ag/snva009ag.pdf BGA 12 0.5 R-XBGA-N12 Texas Instruments, DSBGA, 0.9x1.4mm, 6 bump 2x3 (perimeter) array, NSMD pad definition Appendix A BGA 1156 1 FF1157.

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