169-Ball Plastic Ball Grid Array [PBGA] (B-169) Dimensions shown in millimeters a A1 CORNER INDEX AREA 19.20 19.00 SQ 18.80 17 A1 BALL PAD INDICATOR TOP VIEW 17.05 16.95 SQ 16.85 16 15 14 12 10 8 6 4 2 13 11 9 7 5 3 1 A B C D E F G H J K L M N P R T U 16.00 BSC SQ 1.00 BSC BOTTOM VIEW 2.50 2.23 1.97 DETAIL A 0.65 0.56 0.45 0.50 NOM 0.40 MIN SEATING PLANE DETAIL A 0.70 0.60 0.50 BALL DIAMETER COMPLIANT TO JEDEC STANDARDS MS-034-AAG-2 1.22 1.17 1.12 0.20 MAX COPLANARITY