a 49-Ball Chip Scale Package Ball Grid Array [CSP_BGA] (BC-49-1) Dimensions shown in millimeters 5.05 5.00 SQ 4.95 A1 CORNER INDEX AREA 7 6 5 4 3 2 1 A BALL A1 INDICATOR TOP VIEW B C 3.90 BSC SQ D E F G 1.20 MAX 0.55 BSC DETAIL A 0.35 0.20 0.45 0.40 0.35 BALL DIAMETER SEATING PLANE 1.00 MAX 0.85 MIN COPLANARITY 0.05 MAX 012006-0 0.65 BSC DETAIL A BOTTOM VIEW