12-Lead Lead Frame Chip Scale Package [LFCSP_SS] 4 x 4 mm Body, With Side Solderable Leads (CS-12-1) Dimensions shown in millimeters 0.55 0.50 0.45 PIN 1 INDICATOR 12 10 1.00 BSC 9 1 2.50 2.40 SQ 2.30 EXPOSED PAD 0.40 MIN TOP VIEW 1.50 1.45 1.40 SEATING PLANE 0.075~0.150 (Step dimension) 3 7 0.60 0.50 0.40 6 4 BOTTOM VIEW 0.20 MIN 2.00 REF 0.05 MAX 0.02 NOM COPLANARITY 0.08 0.203 REF 01-28-2014-A PIN 1 INDICATOR 4.10 4.00 SQ 3.90