SOJ Component Package
Overview
SOJ (Small-Outline J-leaded package) is a SMD component package with many J-type folded leads. It has the same general package dimensions as the standard SOIC but with J-type leads rather than Gull-wing leads. Just like SOIC, it is commonly used to house integrated circuits (ICs).
All variants of the SOJ package seem to have a 1.27 mm (0.05") lead pitch, except for SOJ-4. 10.16mm (0.400") is a common body width for SOJ packages. Pin counts commonly vary from 16 to 40.
As of 2024, SOJ is not a commonly used SMD package. One advantage of the SOJ package is the bending resilience of the J-type leads before it is soldered. A SOJ package could be dropped from a fair height onto a hard surface without the leads bending. Packages with gull-wing leads such as SOIC or QFP would not fare as well.
Synonyms
- PBG32: Renesas's name for the SOJ-32 package1.
Photos
![](/assets/images/ic-package-soj-28-0fcb49fa65de3bb32df92b4d9855153b.jpg)
Dimensions
According to EESemi2, the SOJ packages with 16 through 24 pins have a body width of 7.5mm and height of 2.9mm, while the SOJ packages with 28 through 40 pins have a body width of 10.16mm and height of 3.5mm. The lead pitch is 1.27mm.
Below are the dimensions for Infineon's SOJ-32 package3:
![](/assets/images/soj-32-package-dimensions-infineon-d1359901594635b0b5c4ea39f7f750a7.png)
Recommended Land Pattern
Below is the recommended land pattern for Infineon's SOJ-32 package3:
![](/assets/images/soj-recommended-land-pattern-infineon-73fad04579fa5ce5e2738740ec7c13ed.png)
SOJ Sockets
You can purchase sockets for SOJ ICs so that you don't have to solder them onto the PCB. Below is a photo of a 40pin SOJ socket listed on eBay:
![](/assets/images/soj-40-socket-ebay-a374d6d18065f3643c1fdf896b4853d0.webp)
Similar To
- PLCC: Another package with J-type leads.
- SOIC: Like SOJ but with Gull-wing leads. More popular than SOJ.
Footnotes
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Renesas. PBG32 (SOJ 32). Retrieved 2024-04-18, from https://www.renesas.com/us/en/package/pbg32. ↩
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EESemi. SOJ - Small Outline J-Lead Package. Retrieved 2024-04-18, from https://eesemi.com/soj.htm. ↩
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Infineon. PG-SOJ-32-801 | SOJ-32 (51-85033). Retrieved 2024-04-18, from https://www.infineon.com/cms/en/product/packages/PG-SOJ/PG-SOJ-32-801/. ↩ ↩2 ↩3 ↩4
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eBay. 40 Pin IC Sockets Surface Mount SOJ Foxconn PA1200-P2 (20 pieces). Retrieved 2024-04-18, from https://www.ebay.com/itm/382682187300. ↩