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0.4mm; http://ww1.microchip.com/downloads/en/devicedoc/atmel-8235-8-bit-avr-microcontroller-attiny20_datasheet.pdf#page=208 WLCSP-16, 1.409x1.409mm, 16 Ball, 4x4 Layout, 0.35mm Pitch, https://www.st.com/resource/en/datasheet/stm32h7a3ai.pdf ST WLCSP-156, ST die ID 479, 3.56x3.52mm, 64 Ball, 8x8 Layout, 0.4mm Pitch, https://assets.nexperia.com/documents/data-sheet/PCMFXUSB3S_SER.pdf ST WLCSP-18, ST Die ID 466, 1.86x2.14mm, 18 Ball, X-staggered 7x5 Layout, 0.4mm Pitch, YFF0006, NSMD pad definition Appendix A BGA 238 0.5 CP236 CPG236 Artix-7 BGA, 26x26 grid, 27x27mm package, 1mm pitch; https://www.xilinx.com/support/documentation/user_guides/ug475_7Series_Pkg_Pinout.pdf#page=301, NSMD pad definition Appendix A Virtex-7 BGA, 44x44 grid, 45x45mm.

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