WKG Package 52-Lead QFN Multipad (7mm × 8mm) (Reference LTC DWG # 05-08-1768 Rev B) SEATING PLANE A 7.00 BSC 0.00 – 0.05 2.625 REF 41 B PAD 1 CORNER 3 2.90 REF 0.50 BSC 40 3.20 ±0.10 2.025 ±0.10 2.925 ±0.10 3.90 ±0.10 bbb M C A B 8.00 BSC 1 3.40 REF 7 PIN 1 ID 52 3.40 REF 33 8 32 9 1.00 REF 10 NX b aaa C 2x 4.275 ±0.10 27 0.580 ±0.10 TOP VIEW 0.90 ±0.10 6 2.025 ±0.10 1.775 REF 0.25 ±0.05 WKG52 QFN REV B 1013 2.625 REF NOTE: 1. DIMENSIONING AND TOLERANCING CONFORM TO ASME Y14.5M-1994 2. ALL DIMENSIONS ARE IN MILLIMETERS, ANGLES ARE IN DEGREES (°) 3.40 REF 2.925 ±0.10 3 THE LOCATION OF THE TERMINAL #1 IDENTIFIER AND TERMINAL NUMBERING CONVENTION CONFORMS TO JEDEC PUBLICATION 95 SPP-002 4 DIMENSION b APPLIES TO METALLIZED TERMINAL AND IS MEASURED BETWEEN 0.20mm AND 0.30mm FROM THE TERMINAL TIP. IF THE TERMINAL HAS THE OPTIONAL RADIUS ON THE OTHER END OF THE TERMINAL, THE DIMENSION b SHOULD NOT BE MEASURED IN THAT RADIUS AREA. 5 COPLANARITY APPLIES TO THE TERMINALS AND ALL OTHER SURFACE METALLIZATION 6 DRAWING SHOWN ARE FOR ILLUSTRATION ONLY 3.90 ±0.10 0.85 × 0.85 (6×) 0.8 × 0.8 (12×) 1.00 REF 8.50 ±0.05 4.275 ±0.10 2.25 ±0.10 15 BOTTOM VIEW (BOTTOM METALLIZATION DETAILS) 5 PIN 1 3.20 ±0.10 0.40 ±0.10 19 1.35 ±0.10 NX 0.08 C // ccc C 7.50 ±0.05 2.90 REF 0.50 BSC 14 26 aaa C 2x 3.40 REF 2.25 ±0.10 PACKAGE OUTLINE 0.40 ±0.10 0.9 × 0.9 (8×) SYMBOL TOLERANCE aaa 0.15 bbb 0.10 ccc 0.10 7. PAD LAYOUT AND SETNCIL LAYOUT AS GUIDE LINE ONLY. DRAWING NOT TO SCALE 0.25 ±0.05 1.775 REF RECOMMENDED SOLDER PAD LAYOUT TOP VIEW 1.35 ±0.10 RECOMMENDED STENCIL DESIGN (SAME DIMENSIONS AS PAD LAYOUT, NOTE 7)