[sdiy] Digital topics like PLDs?

Roman Sowa modular at go2.pl
Mon May 25 09:19:29 CEST 2015

PLDs draw a lot of current, 100mA is not uncommon.
Last time I had to replace PLD, I used little breakout board and PIC 
micro running at internal 32MHz clock. Since original circuit timing was 
considerably slower, so there was enough time to fit required number of 

Well, I actually did it mostly because I had no programmer, no clean 
chips and no prior hands-on experience with PLDs.

Another option would be to put a little OTP EPROM.


W dniu 2015-05-24 o 17:17, MTG pisze:
> I know we talk about Micros and DSPs a lot, but I wonder if anyone knows
> anything about simple PLDs. I have 3 or 4 TTL chips that I would like to
> pop into a PLD. It has to work in an 80's vintage synth so that means
> I/O is 5v, mostly LSTTL. The TTL chips are surprisingly expensive.
> pretty much $1 each at Mouser/Digiket/etc.
> My last encounter with this stuff was a 22v10 design and I see that you
> can still buy those. Is that a viable route or a waste of time and money
> versus a similar but newer part. I prefer it to be a DIP package.  Also
> any software recommendations. I have PLDshell 5.0 on 3.5" floppy but I
> imagine there is something more current for this stuff.
> GB
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