Quadruple in-line package
Encyclopedia
In microelectronics
, a quadruple in-line package (QIP), sometimes called a QIL package, is an device package for electronic integrated circuit
s. The plastic package has the same dimensions as a DIL
package, but the leads on each side are bent into an alternating zigzag configuration so as to fit 4 lines of solder pads (instead of 2 with a DIL). The purpose of the QIL was to increase the spacing between solder pads without increasing package size, for two reasons.
As QILs became obsolete in the 1980s, many hobbyists and small manufacturers simply rebent the pin
s on old stock QIL chips with pliers
to make them fit the standard DIL layout.
Some QIL packaged ICs had added heatsinking tabs, such as the HA1306
Microelectronics
Microelectronics is a subfield of electronics. As the name suggests, microelectronics relates to the study and manufacture of very small electronic components. Usually, but not always, this means micrometre-scale or smaller,. These devices are made from semiconductors...
, a quadruple in-line package (QIP), sometimes called a QIL package, is an device package for electronic integrated circuit
Integrated circuit
An integrated circuit or monolithic integrated circuit is an electronic circuit manufactured by the patterned diffusion of trace elements into the surface of a thin substrate of semiconductor material...
s. The plastic package has the same dimensions as a DIL
Dual in-line package
In microelectronics, a dual in-line package is an electronic device package with a rectangular housing and two parallel rows of electrical connecting pins. The package may be through-hole mounted to a printed circuit board or inserted in a socket.A DIP is usually referred to as a DIPn, where n is...
package, but the leads on each side are bent into an alternating zigzag configuration so as to fit 4 lines of solder pads (instead of 2 with a DIL). The purpose of the QIL was to increase the spacing between solder pads without increasing package size, for two reasons.
- First it allowed more reliable solderingSolderingSoldering is a process in which two or more metal items are joined together by melting and flowing a filler metal into the joint, the filler metal having a lower melting point than the workpiece...
. This may seem odd today, given the far closer solder pad spacing in use now, but in the 1970s, they heyday of the QIL, bridging of neighbouring solder pads on DIL chips was an issue at times, - QIL also increased the possibility of running a copperCopperCopper is a chemical element with the symbol Cu and atomic number 29. It is a ductile metal with very high thermal and electrical conductivity. Pure copper is soft and malleable; an exposed surface has a reddish-orange tarnish...
track between 2 solder pads. This was very handy on the then standard single sided single layer PCBsPrinted circuit boardA printed circuit board, or PCB, is used to mechanically support and electrically connect electronic components using conductive pathways, tracks or signal traces etched from copper sheets laminated onto a non-conductive substrate. It is also referred to as printed wiring board or etched wiring...
.
As QILs became obsolete in the 1980s, many hobbyists and small manufacturers simply rebent the pin
Pin
A pin is a device used for fastening objects or material together.Pin may also refer to:* Award pin, a small piece of metal or plastic with a pin attached given as an award for some achievement...
s on old stock QIL chips with pliers
Pliers
Pliers are a hand tool used to hold objects firmly, for bending, or physical compression. Generally, pliers consist of a pair of metal first-class levers joined at a fulcrum positioned closer to one end of the levers, creating short jaws on one side of the fulcrum, and longer handles on the other...
to make them fit the standard DIL layout.
Some QIL packaged ICs had added heatsinking tabs, such as the HA1306
