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Small Outline Integrated Circuit
A Small Outline Integrated Circuit (SOIC) is a surface-mounted integrated circuit (IC) package which occupies an area about 30–50% less than an equivalent DIP, with a typical thickness that is 70% less. They are generally available in the same pinouts as their counterpart DIP ICs. The convention for naming the package is SOIC or SO followed by the number of pins. For example, a 14-pin 4011 would be housed in an SOIC-14 or SO-14 package.
==JEDEC and EIAJ standards==
''SOIC'' actually refers to at least two different package standards: The EIAJ SOIC body is approximately wide, while the JEDEC SOIC body is approximately wide. The EIAJ packages are also thicker and slightly longer. Otherwise the packages are similar.
Note that because of this, SOIC is not specific enough of a term to describe parts which are interchangeable. Many electronic retailers will list parts in either package as ''SOIC'' whether they are referring to the JEDEC or EIAJ standards. The wider EIAJ packages are more common with higher pin count ICs, but there is no guarantee that an SOIC package with any number of pins will be either one or the other.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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