intersil的L12.4X3A - 12导薄双平面线的塑料封装（LDFN） L12.4X4A — 12 Lead Dual Flat No-Lead Plastic Package Plastic Packages for Integrated Circuits Package Outline Drawing L12.4x4A 12 LEAD DUAL FLAT NO-LEAD PLASTIC PACKAGE Rev 1, 3/11 3.2 REF A 4.00 PIN #1 INDEX AREA 10X 0.50 BSC 6 B 1 6 12X 0 . 45 ……