349-Ball Chip Scale Package Ball Grid Array [CSP_BGA] (BC-349-1) Dimensions shown in millimeters 19.10 19.00 SQ 18.90 A1 BALL CORNER 22 20 18 16 14 12 10 8 6 4 2 21 19 17 15 13 11 9 7 5 3 1 A C E G 16.80 REF SQ J L N 0.80 BSC R U B D F H K M P T W AA TOP VIEW 1.50 1.36 1.21 1.10 REF V Y AB BOTTOM VIEW DETAIL A DETAIL A 1.11 1.01 0.91 0.35 NOM 0.30 MIN SEATING PLANE 0.50 COPLANARITY 0.2 0.45 0.40 BALL DIAMETER COMPLIANT TO JEDEC STANDARDS MO-275-PPAB-2. 04-012013-B A1 BALL CORNER