tdfn socket

[FFMan]

To get the fram memory (tdfn package) going i er made up a BOB but its not ideal.

I found this tdfn socket http://www.silego.com/buy/index.php?mai ... cts_id=257 but although it will do the trick, its a bit bulky.

Has anyone used anything like this or knows where i can obtain similar but smaller ?

[dkinzer]

Has anyone used anything like this or knows where i can obtain similar but smaller ?

We use clamshell Zero-Insertion-Force sockets similar to that one for programming our TQFP devices. The price is very good; usually they cost $50-$100 or more. I suspect that you won't find anything that is much smaller although you may be able to find a commercially-made breakout board.

[dlh]

I'm not sure what you are looking for but here are some DFN to DIP adapters for prototyping.

http://www.epboard.com/eproducts/protoa ... DIPAdapter

[FFMan]

thanks dlh - interesting option but as i can't solder these mounts i don't think it will be much use on their own. i see they offer a solder option but sending ICs from UK to USA and back again could be seen as a little excessive (but not out of the question).

thanks for your help

[dlh]

Once they've done it, most people find that soldering SMD components using solderpaste and a toaster oven is actually easier than soldering through-hole components with a soldering iron.

[mikep]

Once they've done it, most people find that soldering SMD components using solderpaste and a toaster oven is actually easier than soldering through-hole components with a soldering iron.

Personally I wouldn't start with DFNs. They are the second hardest to solder next to BGAs. Using solder paste and correctly positioning parts is an art too as it is easy to use too much and get solder bridges. You can hand solder QFNs with a solder air station as I have done on Oak Micros zx328pu and om328p devices - with lots of practice.

BTW I notice that you can also get SOIC versions which are much easier to solder. Try asking Framtron for a few samples. Oak Micros has cheap 8-pin SOIC to PDIP adapters as well.

[FFMan]

My suppliers here in the uk do not list soic versions.

I have a friend with hot air smt skills, is this what is required to solder tdfn to the suggested carrier board ?

[dlh]

I have a spinal cord injury which has made one hand nearly useless so I prefer a stencil & toaster oven myself but ask your friend if he thinks he can handle this. Here's an excellent video tutorial that shows soldering a QFN using hot air.
http://www.youtube.com/watch?v=c_Qt5CtUlqY