US Sources for old ICs

Paul Koning pkoning at equallogic.com
Wed Oct 26 11:53:31 CDT 2005


>>>>> "woodelf" == woodelf  <bfranchuk at jetnet.ab.ca> writes:

 woodelf> I just want PLCC packaging and 5 volt logic. I keep looking
 woodelf> at all the new FPGA logic thinking that would be a nice chip
 woodelf> and I don't like the packaging or voltage.Also with all the
 woodelf> new chips you get more pins, but more of them are power.

Check out Lattice.  They have nice CPLDs, some approaching FPGA
complexity.  Many have "easy" packaging -- no DIP but certainly PLCC.
And there are whole series that run on 5 volts.  I've used them; the
tools are pretty good too.  (Win only, as usual, sorry...)

Yes, new chips have more power pins because they have higher clock
frequencies.  Some of them need it for current rating, too, but the
usual reason is to keep the inductance low.  With a 100 MHz clock,
this matters...

     paul



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