121-Ball Chip Scale Package Ball Grid Array [CSP_BGA] (BC-121-1) Dimensions shown in millimeters a A1 CORNER INDEX AREA 12.20 12.00 SQ 11.80 BALL A1 CORNER 11 10 9 8 7 6 5 4 3 2 1 A B C D 10.00 BSC SQ E F G H J K L 1.00 BSC BOTTOM VIEW TOP VIEW DETAIL A *1.31 1.21 1.11 DETAIL A 0.50 NOM 0.30 MIN 0.70 0.60 0.50 BALL DIAMETER SEATING PLANE *COMPLIANT WITH JEDEC STANDARDS MO-192-ABD-1 WITH EXCEPTION TO PACKAGE HEIGHT AND THICKNESS. 0.20 COPLANARITY 082406-A *1.85 1.71 1.40