I have seen some small ICs whose package sizes are SOT - 323, SOT223-8,SOT 223-5 and so on. What do these numbers after SOT indicate?

 

https://www.intersil.com/en/support/packaginginfo.html#
http://www.ti.com/support-packaging/packaging-resources/packaging-terminology.html

 

https://www.intersil.com/en/support/packaginginfo.html#
http://www.ti.com/support-packaging/packaging-resources/packaging-terminology.html

Thank you sir. But the above links do not provide any information regarding the numbers.

 

http://www.electrodragon.com/w/Package

 

http://www.electrodragon.com/w/Package

Sir, It still doesn't provide any information regarding the meaning of those numbers and I couldn't find any relation.

 

Hello,

I don't think there ia a direct relation between the numbers and package size.
The wiki has a large page about the SOT packages:
https://en.wikipedia.org/wiki/Small-outline_transistor

bertus

 

Hello,

I don't think there ia a direct relation between the numbers and package size.
The wiki has a large page about the SOT packages:
https://en.wikipedia.org/wiki/Small-outline_transistor

bertus

Oh I see sir. And my first stop was at Wikipedia only.
I started to wonder what was the reason for these numbers like SOT 323, SOT 353 and so on?

What does those numbers indicate about the IC?

Hoping anyone could answer this query! And thank you sir!

 

Oh I see sir. And my first stop was at Wikipedia only.
I started to wonder what was the reason for these numbers like SOT 323, SOT 353 and so on?

What does those numbers indicate about the IC?

Unfortunately, those numbers only specify the package so you can look up the dimensions and lay out a PC board, they don't indicate anything about what is actually inside. A SOT-23 package can contain many different kinds of transistors, diodes, temperature sensors or complete microcontrollers (see PIC10F200). There is sometimes coding on the package to tell what's inside but that varies.