54-Ball Wafer Level Chip Scale Package [WLCSP] (CB-54-1) Dimensions shown in millimeters 2.800 2.760 SQ 2.720 0.128 0.230 7 5 6 3 4 2 1 A 0.35 BALL A1 IDENTIFIER B BSC C D E 0.303 F BSC G 0.350 BSC PKG-004742 SEATING PLANE END VIEW 0.320 0.290 0.260 5 4 3 BOTTOM VIEW 2 1 0.123 (BALL SIDE UP) COPLANARITY 0.05 0.280 0.240 0.200 0.210 0.180 0.150 06-23-2015-A 0.530 0.470 0.410 H 6 TOP VIEW (BALL SIDE DOWN)