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A QFP or Quad Flat Package is an integrated circuit
Integrated circuit

In electronics, an integrated circuit is a miniaturized electronic circuit that has been manufactured in the surface of a thin Wafer of semiconductor material....
 package with leads extending from each of the four sides. It is used primarily for surface mount
Surface-mount technology

Surface-mount technology is a method for constructing Electronics circuits in which the components are mounted directly onto the surface of printed circuit boards ....
ing (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.






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A QFP or Quad Flat Package is an integrated circuit
Integrated circuit

In electronics, an integrated circuit is a miniaturized electronic circuit that has been manufactured in the surface of a thin Wafer of semiconductor material....
 package with leads extending from each of the four sides. It is used primarily for surface mount
Surface-mount technology

Surface-mount technology is a method for constructing Electronics circuits in which the components are mounted directly onto the surface of printed circuit boards ....
ing (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
LQFP

A Low-profile Quad Flat Package is a surface mount integrated circuit package format with component leads extending from each of the four sides....
 (Low profile QFP) and TQFP
TQFP

Thin Quad Flat Pack is a type of Surface-mount_technology Surface-mount_technology#Package_sizes. Components of this type provide the same benefit of the metric QFP package, but are thinner and have a standard lead-frame footprint ....
 (Thin QFP).

The package type became common in Europe
Europe

Europe is, conventionally, one of the world's seven continents. Comprising the westernmost peninsula of Eurasia, Europe is generally divided from Asia to its east by the water divide of the Ural Mountains, the Ural , the Caspian Sea, and by the Caucasus Mountains to the southeast....
 and US during the early nineties, but QFP components have been used in Japan
Japan

Japan is an island country in East Asia. Located in the Pacific Ocean, it lies to the east of the Sea of Japan, People's Republic of China, North Korea, South Korea and Russia, stretching from the Sea of Okhotsk in the north to the East China Sea and Taiwan in the south....
ese consumer electronics
Consumer electronics

Consumer electronics include electronic equipment intended for everyday use. Consumer electronics are most often used in entertainment, communications and office productivity....
 since the seventies, most often mixed with hole mounted, and sometimes socket
Socket

Socket can refer to:In mechanics:* Socket wrench, a type of wrench that uses separate, removable sockets to fit different sizes of nuts and bolts...
ed, components on the same printed circuit board
Printed circuit board

A printed circuit board, or PCB, is used to mechanically support and electrically connect electronic components using Conductor pathways, or signal traces, industrial etchinged from copper sheets laminated onto a non-conductive substrate....
.

A package related to QFP is PLCC
Plastic leaded chip carrier

A Plastic Leaded Chip Carrier is a four-sided Lead plastic integrated circuit package with pin spacings of 0.05" . Lead counts range from 20 to 84....
 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 (soldering is also possible). It is very commonly used for NOR
Nor

selfref|For the Wikipedia policy, see...
 Flash memories
Flash memory

Flash memory is a non-volatile memory computer storage that can be electrically erased and reprogrammed. It is a technology that is primarily used in memory cards and USB flash drives for general storage and transfer of data between computers and other digital products....
 and other programmable components.

Variants

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The basic form is a flat rectangular (often square) body with pins at four sides but there exists a multiplicity of designs. These differ usually only in pin number, pitch, dimensions and used materials to improve (usually in order the thermal characteristics). A clear variation is Bumpered Quad Flat Package with extensions at the four corners to protect the pins against mechanical damage before the unit is soldered.

  • BQFP: Bumpered Quad Flat Package
  • BQFPH: Bumpered Quad Flat Package with heat spreader
    Heat spreader

    A heat spreader is most often simply a copper plate, having high thermal conductivity. Functionally, it is a primary heat exchanger that moves heat between a heat source and a secondary heat exchanger....
  • CQFP: Ceramic Quad Flat Package
  • FQFP: Fine Pitch Quad Flat Package
  • HQFP: Heat sinked Quad Flat Package
  • LQFP
    LQFP

    A Low-profile Quad Flat Package is a surface mount integrated circuit package format with component leads extending from each of the four sides....
    : Low Profile Quad Flat Package
  • MQFP: Metric Quad Flat Package
  • PQFP
    PQFP

    PQFP, or plastic quad flat pack, is a type of Integrated circuit packaging. PQFP is a special case of QFP, as is the thinner TQFP package....
    : Plastic Quad Flat Package
  • SQFP: Small Quad Flat Package
  • TQFP
    TQFP

    Thin Quad Flat Pack is a type of Surface-mount_technology Surface-mount_technology#Package_sizes. Components of this type provide the same benefit of the metric QFP package, but are thinner and have a standard lead-frame footprint ....
    : Thin Quad Flat Package
  • VQFP: Very small Quad Flat Package
  • VTQFP: Very Thin Quad Flat Package


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