30-Ball Wafer Level Chip Scale Package [WLCSP] (CB-30-2) Dimensions shown in millimeters a 0.650 0.595 0.540 3.44 3.40 3.36 SEATING PLANE 6 5 4 3 2 1 A BALL A1 IDENTIFIER B 0.34 0.32 0.30 2.00 REF C D E 0.50 BALL PITCH TOP VIEW (BALL SIDE DOWN) 0.27 0.24 0.21 BOTTOM VIEW (BALL SIDE UP) 2.50 REF 082808-A 2.68 2.64 2.60