I was recently looking at some SPI SRAM chips at Mouser and noticed that a particular IC came in both a
TSSOP-8 package. The specs seem identical but the price is different (not by much, but different).
Visually, it looks like you could take a SOIC and push down from the middle to flatten the pins out and you would have a TSSOP. I know it's not the same thing but it looks like you could. ;-)
Anyway, given the same specs, why would you choose one package over the other? Both seem to be as easy to solder as the other (pins not under IC). Both seem about the same size.
For me, it would seem you would pick the cheaper of the two but there has to be more than that.
One thing I didn't make clear, is that I am wondering if the differences are just physical or are there others? I see now that the size difference can be quite large considering....
So I am gathering that if board space is a premium (which it usually is) then use TSSOP. But then why do we need SOIC at all?
Hope that makes it more clear.