a 81-Ball Chip Scale Package Ball Grid Array [CSP_BGA] (BC-81-1) Dimensions shown in millimeters A1 CORNER INDEX AREA 10.00 BSC SQ BALL A1 INDICATOR 9 8 7 6 5 4 3 2 1 A B C 8.00 BSC SQ D TOP VIEW E F G 1.00 BSC H J BOTTOM VIEW DETAIL A 0.30 MIN 0.70 SEATING 0.60 PLANE 0.50 BALL DIAMETER COMPLIANT WITH JEDEC STANDARDS MO-192-ABC-1. 1.10 0.25 0.20 COPLANARITY 012006-0 DETAIL A 1.70 MAX