a 16-Ball Wafer Level Chip Scale Package [WLCSP] (CB-16-4) Dimensions shown in millimeters 0.645 0.600 0.555 1.700 1.660 SQ 1.620 SEATING PLANE 4 3 2 1 A BALL 1 IDENTIFIER 0.287 0.267 0.247 B 0.40 REF C D 0.415 0.400 0.385 0.05 MAX COPLANARITY 0.230 0.200 0.170 BOTTOM VIEW (BALL SIDE UP) 102908-A TOP VIEW (BALL SIDE DOWN)