QFN and DFN, these two types of semiconductor component packaging, are often easily confused in practical work. It is often unclear which one is QFN and which one is DFN. Therefore, we need to understand what QFN is and what DFN is.
QFN is a type of packaging. It is the name defined by the Japan Electronics and Machinery Industries Association, with the first letter of each of the three English words capitalized. In Chinese, it is called "square flat no-lead package."
DFN is an extension of QFN, with the first letter of each of the three English words capitalized.
The pins of QFN packaging are distributed on all four sides of the package and the overall appearance is square.
The pins of DFN packaging are distributed on two sides of the package and the overall appearance is rectangular.
To distinguish between QFN and DFN, you only need to consider two factors. First, look at whether the pins are on four sides or two sides. If the pins are on all four sides, it is QFN; if the pins are only on two sides, it is DFN. Second, consider whether the overall appearance is square or rectangular. Generally, a square appearance indicates QFN, while a rectangular appearance indicates DFN.
Post time: Mar-30-2024