A plastic leaded chip carrier (PLCC) is a plastic, four-sided chip carrier, with a “J”-lead and pin spacings of 0.05" (1.27 mm). Lead counts range from 20 to 84.[1] PLCC packages can be square or rectangular. Body widths range from 0.35" to 1.15". PLCCs conform to the JEDEC standard. The PLCC “J” Lead configuration requires less board space versus equivalent gull leaded components, and is a less expensive version of the leadless chip carrier, which is a housing with flat contacts instead of pin connectors, on each side.
A PLCC circuit may either be installed in a PLCC socket or surface-mounted. PLCC sockets may in turn be surface mounted, or use through-hole technology. The motivation for a surface-mount PLCC socket would be when working with devices that cannot withstand the heat involved during the reflow process, or to allow for component replacement without reworking. Using a PLCC socket may be necessary in situations where the device requires stand-alone programming, such as some flash memory devices. Some through-hole sockets are designed for prototyping with wire wrapping.
A specialized tool called a PLCC extractor facilitates the removal of a PLCC from a socket.
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Variants
- QFJ20 (PLCC20) - (10-0-10-0)
See also
- Integrated circuit packaging
- Leadless chip carrier
- Chip carrier Chip packaging and package types list
External links
References
- ^ Minges, Merrill L. (1989). Electronic Materials Handbook. CRC Publishing. p. 173. ISBN 0871702851.
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