QFP

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A Zilog Z80 in QFP format (special case: LQFP).
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A Zilog Z80 in QFP format (special case: LQFP).

A QFP or Quad Flat Package is an integrated circuit device with component leads extending from each of the four sides. It is used in surface mount designs.

QFP have 44 to 200 (or little more) pins in a pitch from 0.4 to 1 mm. A direct predecessor of QFP is PLCC, that uses a larger pin distance of 1.27 mm and a more hight body.

QFP can also refer to Quantum Flux Parametron digital logic technology.

[edit] Variants

A Cyrix Cx486SLC in Bumpered Quad Flat Package format.
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A Cyrix Cx486SLC in Bumpered Quad Flat Package format.

The basic form are a flat rectangular (often square) body with pins at four sides, bud exist 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 damages, before the unit is soldered.

  • BQFP: Bumpered Quad Flat Package
  • BQFPH: Bumpered Quad Flat Package with Heat spreader
  • CQFP: Ceramic Quad Flat Package
  • FQFP: Fine Pitch Quad Flat Package
  • HQFP: Heat sinked QFP
  • LQFP: Low Profile Quad Flat Package
  • MQFP: Metric Quad Flat Package
  • PQFP: Plastic Quad Flat Package
  • SQFP: Small Quad Flat Packag
  • TQFP: Thin Quad Flat Package
  • VQFP: Very small Quad Flat Package
  • VTQFP: Very Thin Quad Flat Package
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