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1.5mm bare copper, 3mm soldermask opening Circular Fiducial, 0.5mm bare copper, 1.5mm soldermask opening (Level B Circular Fiducial, 0.75mm bare copper, 1.5mm soldermask opening Circular Fiducial, 1mm bare copper, 2.25mm soldermask opening (Level B Circular Fiducial, 0.75mm bare copper, 2mm soldermask opening Circular Fiducial, 1mm bare copper, 3mm soldermask opening Circular Fiducial, 1mm bare copper, 2mm soldermask opening Circular Fiducial, 1.5mm bare copper, 1.5mm soldermask opening (Level A Circular Fiducial, 0.75mm 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, based on a regular polygon. ≥30 means "round, using current quality setting".

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