Plastic Packages for Integrated Circuits Package Outline Drawing L28.4x4B 28 LEAD QUAD FLAT NO-LEAD PLASTIC PACKAGE Rev 0, 11/09 4X 2.4 4.00 24X 0.40 A B 22 6 PIN #1 INDEX AREA 28 TYP. 0.40±0.10 6 PIN 1 INDEX AREA 1 4.00 21 2 .60 2 .20 1 .80 7 15 (4X) 0.15 14 8 0.10 M C A B 4 28X 0.20 ±0.05 TYP. 0.40 ±0.10 TOP VIEW BOTTOM VIEW SEE DETAIL "X" 0.90 ±0.100 ( 3.80) 0.10 C ( 17X 0 . 20) ( 24X 0 . 40 ) C SEATING PLANE 0.08 C ( 17X 0 .60) SIDE VIEW ( 3. 80 ) ( 11X 0 . 20 ) ( 1. 80 ) ( 2.20 ) 0.2 REF C ( 9 x 0.25 ) 5 ( 2X 0 . 60) ( 0 . 00 MIN. 0 . 05 MAX. 2. 60 ) DETAIL "X" TYPICAL RECOMMENDED LAND PATTERN NOTES: 1. Dimensions are in millimeters. Dimensions in ( ) for Reference Only. 2. Dimensioning and tolerancing conform to ASME Y14.5m-1994. 3. Unless otherwise specified, tolerance : Decimal ± 0.10 Angular ±2.50° 4. Dimension applies to the metallized terminal and is measured between 0.15mm and 0.30mm from the terminal tip. 5. Tiebar shown (if present) is a non-functional feature. 6. The configuration of the pin #1 identifier is optional, but must be located within the zone indicated. The pin #1 indentifier may be either a mold or mark feature. 1