52-Ball Chip Scale Package Ball Grid Array [CSP_BGA] (BC-52) Dimensions shown in millimeters a A1 CORNER INDEX AREA 5.00 BSC SQ 9 8 7 6 5 4 3 2 1 A BALL A1 INDICATOR TOP VIEW B C D 4.00 BSC SQ E F G H J 0.50 BSC DETAIL A DETAIL A 0.35 0.20 0.35 0.30 0.25 BALL DIAMETER SEATING PLANE COMPLIANT TO JEDEC STANDARDS MO-195-AB 1.00 MAX COPLANARITY 0.08 MAX 012006-0 1.15 1.05 0.95 BOTTOM VIEW