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Copper, 4.5mm soldermask opening Circular Fiducial, 0.5mm bare copper, 3mm soldermask opening Circular Fiducial, 0.75mm bare copper, 4.5mm soldermask opening Circular Fiducial, 0.75mm bare copper, 4.5mm soldermask opening Circular Fiducial, 0.5mm bare copper, 1.5mm soldermask opening (recommended 5-pin SAW filter package based on http://www.latticesemi.com/view_document?document_id=213 Lattice caBGA-756, ECP5 FPGAs, 27.0x27.0mm, 756 Ball, 32x32 Layout, 0.8mm Pitch, https://www.micron.com/-/media/client/global/documents/products/data-sheet/dram/ddr3/4gb_ddr3l.pdf#page=25 FBGA-78, 10.5x9.0mm, 78 Ball, 9x13 Layout, 0.8mm Pitch, https://www.st.com/resource/en/datasheet/stm32h7b3ri.pdf ST TFBGA-257, 10.0x10.0mm, 257 Ball, 19x19 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.

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