Yahoo groups is really iffy on posting these days. Anyway here it is
again:
The website I put up a while ago shows just such a usage.
http://myweb.cableone.net/wheedal/pcb.htm
uses a 100 pin TQFP Xilinx CPLD as a TT demonstration. The part
is .5mm or 19.685mil pin center to pin center. Works good, have done
it *many* times since the first posting.
-Dal
--- In Homebrew_PCBs@yahoogroups.com, Stefan Trethan
again:
The website I put up a while ago shows just such a usage.
http://myweb.cableone.net/wheedal/pcb.htm
uses a 100 pin TQFP Xilinx CPLD as a TT demonstration. The part
is .5mm or 19.685mil pin center to pin center. Works good, have done
it *many* times since the first posting.
-Dal
--- In Homebrew_PCBs@yahoogroups.com, Stefan Trethan
> I bought a few ICs at ebay, very cheap, but some have tqfp case....they
>
> the pin to pin spacing is 20mil i believe, it are 100 pins.
>
> Do you think this is possible with TT?
>
> It are xilinx cplds..
>
> I have some with 160pins (xc95216) but they have a wider spacing,
> don't trouble
> me much but the 20 mil is really a bit low.....