qfn封装是一种极具适用能力强、结构简单、高性价比的封装形式，在可预见的5年内出现替代封装的可能性不高。qfn封装的开发方向目前明朗的有两个：大尺寸、模组化。

MAXIMUM ALLOWABE BURRS IS 0.076 mm IN ALL DIRECTIONS. PIN #1 ID ON TOP (PACKAGE) WILL BE LASER MARKED. DIMENSION APPLIES TO METALIZED TERMINAL AND IS MEASURED BETWEEN 0.20 AND 0.25 mm FROM TERMINAL TIP. APPLIED ONLY FOR TERMINALS. APPLIED FOR EXPOSED PAD AND TERMINALS. RED CIRCLE INDICATES THERMAL VIA.

AN72845 offers guidelines for the design, manufacturing, and handling of Infineon quad flat no-lead (QFN) packages on printed circuit boards (PCBs) and flexible printed circuits (FPC).

44-Lead Plastic Quad Flat, No Lead Package (ML) - 8x8 mm Body [QFN or VQFN] A B 0.20 C 0.20 C 0.07 C A B 0.05 C (DATUM B) (DATUM A) C SEATING PLANE NOTE 1 1 2 N 2X NOTE 1 1 2 N 0.10 C A B 0.10 C A B 0.10 C 0.08 C 2X 44X D E A3 A A1 D2 E2 L 44X b K e. Title: 44L_QFN_8x8_ML_C04-0103D.fm Author: C13252 Created Date:

查找 QFN (Quad flat no lead) ) 封装结构图和说明书，如引脚数、间距和尺寸。

Quad Flat No-Lead (QFN) and Dual Flat No-Lead (DFN) package offering includes QFNs, QFNp, VQFN, WQFN, UQFN, XQFN, QFNp-dr and QFNs-mr. We offer multiple QFN configurations in either punch or saw singulated formats. Punch singulated packages are individually “punched” from molded strips during final assembly; saw singulated

Package Dimensions QFN 68 (8 X 8 mm) 302-0000-043 Rev. 1.0, 10/13/2010 1 Chrontel Package Dimensions 68 Pin QFN Package (8 X 8 mm) Table of Dimensions

This application note includes a detailed thermal setup and simulations for different power levels for QFN 5x6, QFN 6x8 and QFN 8x8 package types based on top- and bottom-cooled thermal management solutions. The results of these simulations include estimated device junction temperatures (TJ) for different device power loss (PLOSS) values.

56-Lead Plastic Quad Flat, No Lead Package (RV) - 8x8 mm Body [QFN] With 5.1x5.1 Exposed Pad; Punch Singulated

LDO (QFN 68) LDO (QFN 68) 跳转至页面部分： ... Package Description. Descriptive text for this package. 68 LEAD QFN PACKAGE 8x8 mm (0.40mm Pitch)-ASECL: Package Status. Active: Package Type. QFN: