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90 Ball, X-staggered 21x11 Layout, 0.4mm Pitch, https://www.st.com/resource/en/datasheet/stm32wb55vc.pdf Texas Instruments DSBGA BGA YZP R-XBGA-N8 Texas Instruments, DSBGA, 0.9x1.9mm, 8 bump 2x4 (perimeter) array, NSMD pad definition Appendix A BGA 1156 1 FF1157 FFG1157 FFV1157 FF1158.

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