Quad Flat Pack

A QFP or Quad Flat Package is an integrated circuit package with leads extending from each of the four sides. It is used primarily for surface mounting (SMD); socketing is rare, and hole mounting is not possible. There are versions having from 32 to over 200 pins with a pitch ranging from 0.4 to 1.0 mm. Special cases include LQFP (Low profile QFP) and TQFP (Thin QFP).

The package type became common in Europe and the US during the early nineties, but QFP components have been used in Japanese consumer electronics since the seventies, most often mixed with hole mounted, and sometimes socketed, components on the same printed circuit board.

A package related to QFP is PLCC which is similar but has pins with larger distance, 1.27 mm (or 1/20 inch), curved up underneath a thicker body to simplify socketing. It is very commonly used for NOR Flash memories and other programmable components.

Any questions please call us (949) 276-5225 or email us rfq@4starelectronics.com