SOIC and SOJ - Small Outline Integrated Circuit

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The 'Small Outline Integrated Circuit', or SOIC, is a rectangular surface-mount integrated circuit package with eight or more gull wing leads. The leads protrude from the longer edge of the package. SOIC packages are JEDEC-compliant, and come in a variety of body widths, the most popular of which are 150 mils (narrow body) and 300 mils (wide body). The standard SOIC lead pitch is nominally 50 mils (1.27 mm). The SOIC may be shipped in tubes or tape and reel.

The small outline package may come with J-type leads instead of gull wing leads. Such small outline packages are called 'J-Leaded Small Outline Package', or SOJ's.

Table 1. Properties of some SOIC's and SOJ's

Part Number	Number of Pins	Lead Style	Body Width	Qty Per Tube	Tape Width	Tape Pitch	Qty 13" Reel
SO8G	8	Gull	3.8mm	99	12mm	8mm	2,500
SO14G	14	Gull	3.8mm	50	16mm	8mm	2,500
SO16G	16	Gull	3.8mm	50	16mm	8mm	2,500
SO16G	16	Gull	7.6mm	46	16mm	12mm	1,000
SO20G	20	Gull	7.6mm	38	24mm	12mm	1,000
SO28G	28	Gull	7.6mm	25	24mm	12mm	1,000
SO44G	44	Gull	13.3mm	17	24mm	45mm	750
SO20/26J	20/26	J-Lead	7.6mm	25	24mm	12mm	1,000
SO28J	28	J-Lead	7.6mm	27	24mm	12mm	1,000
SO32J	32	J-Lead	7.6mm	25	24mm	12mm	1,000
SO40J	40	J-Lead	10.0mm	15	44mm	16mm	500
SO42J	42	J-Lead	10.0mm	15	44mm	16mm	500

Figure 1. An 8-lead SOIC (left) and a 28-lead SOJ (right)

See more IC Package Types

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