12-Ball Wafer Level Chip Scale Package [WLCSP] (CB-12-1) Dimensions shown in millimeters 1.670 1.610 1.550 BOTTOM VIEW (BALL SIDE UP) 3 2.070 2.010 1.950 1.50 REF 0.50 BSC TOP VIEW 0.370 0.350 0.330 END VIEW B C (BALL SIDE DOWN) 0.17 0.15 0.13 D 1.00 REF COPLANARITY 0.10 0.360 0.320 0.280 0.280 0.240 0.220 09-06-2012-A SEATING PLANE 1 A BALL A1 IDENTIFIER 0.650 0.590 0.530 2