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Of http://www.st.com/resource/en/datasheet/stm32f051t8.pdf WLCSP-36, 6x6 raster, 2.5x2.5mm package, pitch 0.4mm; https://www.latticesemi.com/view_document?document_id=213 UCBGA-81, 9x9 raster, 4.039x3.951mm package, pitch 0.4mm; see section 7.7 of http://www.st.com/resource/en/datasheet/DM00330506.pdf WLCSP-100, 10x10 raster, 8x8mm package, 0.5mm pitch; https://www.xilinx.com/support/documentation/user_guides/ug475_7Series_Pkg_Pinout.pdf#page=266, NSMD pad definition Appendix A BGA 676 1 FF676 FFG676 FFV676 Kintex-7 and Zynq-7000 BGA, 15x15 grid, 13x13mm package, 0.8mm pitch; https://www.xilinx.com/support/documentation/user_guides/ug865-Zynq-7000-Pkg-Pinout.pdf#page=77, NSMD pad definition (http://www.ti.com/lit/ds/symlink/lm4990.pdf, http://www.ti.com/lit/an/snva009ag/snva009ag.pdf Texas Instruments (http://www.ti.com/lit/ds/symlink/tps22993.pdf QFN, 24 Pin (http://www.ti.com/lit/ds/symlink/tlc5971.pdf#page=39), generated with kicad-footprint-generator ipc_noLead_generator.py QFN, 16 Pin (https://ams.com/documents/20143/36005/AS5055A_DS000304_2-00.pdf#page=24), generated with kicad-footprint-generator Soldered wire connection.

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