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Topic: SOIC same as SO and SOP? (Read 23435 times) previous topic - next topic

liuzengqiang

I read on wiki that SOIC is also called SO:

http://en.wikipedia.org/wiki/Small_Outline_Integrated_Circuit

But on this spec sheet, SOIC and SO seem to mean two different packaging options.

http://www.dipmicro.com/store/74HC4050-SOIC

Click next to "more info". On page 5 towards the bottom. Maybe they meant SOP?

I can't find the exact package drawing. Even digikey only provided the same spec sheet dipmicro did so there is no packaging drawing.

Now after reading this, I think SOIC==SO==SOP. Am I right?

http://en.wikipedia.org/wiki/List_of_electronics_package_dimensions
Serial LCD keypad panel,phi_prompt user interface library,SDI-12 USB Adapter

CrossRoads

TI's SOIC is larger than SOP which is larger than TSSOP.
Scroll down to "CAD/CAE Symbols"
http://www.ti.com/product/cd74hc4050
Designing & building electrical circuits for over 25 years.  Screw Shield for Mega/Due/Uno,  Bobuino with ATMega1284P, & other '328P & '1284P creations & offerings at  my website.

Chagrin

PDIP = .1" pin spacing
SOIC = .05"
TSSOP = .025"

Their "SOP" is a wide SOIC; same pin spacing but a wider package. As well, this particular TSSOP also has a wider package than a typical TSSOP.

liuzengqiang

Thanks guys! So besides TI, do other manufactures also have different SOP and SOIC foot prints?

The eagle 40xx library part 4050 adds to the confusion. It says SO16 and in details Small outline package. But the footprint looks like SOIC. Why the SOP? Lower height?
Serial LCD keypad panel,phi_prompt user interface library,SDI-12 USB Adapter

dlloyd

Quote
Thanks guys! So besides TI, do other manufactures also have different SOP and SOIC foot prints?





Many manufacturer's ICs
come in different sizes (packages).
The main thing to look at is
pin spacing, etc.

   



Dawid_Bittner

http://www.tij.co.jp/jp/lit/sg/jajt107a/jajt107a.pdf, Page 56.

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