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NNTP-Posting-Date: Sat, 16 Nov 2002 15:55:04 -0600
From: "David Jones"
References: <7UjB9.9017$N02.firstname.lastname@example.org> <email@example.com> <firstname.lastname@example.org>
Subject: Re: I need an 8 to 256 decoder or equivalent
Date: Sat, 16 Nov 2002 16:50:49 -0500
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well, I don't know what the device your talking about is but price really
doesn't matter for this project unless the parts are like hundreds of
dollars. size is essential so I will consider. right now actually I need to
go back and take a couple days to learn about digital electronics in general
because I've been trying to take short cuts and am not getting very far. I
think it would be more effective to learn the theory and theory of
components before I try to build much.
thanks for the help
"Keith R. Williams" wrote in message
> In article <email@example.com>,
> firstname.lastname@example.org says...
> > "Bertrand" schreef in bericht
> > news:email@example.com...
> > > Hi,
> > >
> > > > You would need seventeen 74xx154's. First, wire the bottom 4
> > bits
> > > > (let's call them ADDR3 thru ADDR0) to the '154's address inputs
> > >
> > > :\
> > > It would use a lot of board-space; why not using a small
> > > EPLD/FPGA/things-that-can-be-programmed ?
> > Which small EPLD/FPGA/thing-that-can-be-programmed
> > with 256 outputs do you recommend ?
> A "little" overkill but the Virtex-Pro 2VP4 (FF672 package)or perhaps
> two 2VP2s (FG256 package). There's all sorts of other toys in there
> for blinkin' lights too.
> Well they *are* smaller than 17 74XX154s and you didn't say you were on
> a budget. ;-)
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