Re: gEDA-user: Alternative to the ICL7107

[Dave McGuire <mcguire@xxxxxxxxxxxxx>]

Mike Hansen wrote:
> Off topic here but I'm at a dead end on a design.  I need a 3 digit LED
> display driver with a/d.  It appears the venerable 7107 is still the
> only game in town.  Lots of downside for me for using this part:
> 
> -Needs negative supply
> -LED drive configuration is outdated.  There are plenty of 3 digit 7
> segment LED displays that have a common segment drive and then a
> multiplexer for the individual segments.  Units like these:
> http://rocky.digikey.com/WebLib/Lite-on/Web%20Data/C4624JS.pdf
> -I also need to go right angle with LED so I either put the LEDs on a
> right angle header(expensive) or go with right angle LEDs(none of which
> appears to have a pinout compatible with the 7107).
> 
> I am working on a design with low cost in mind and the 7107 design
> certainly isn't low cost.  I could do something PIC based but then I
> have to sink programming time.
> 
> I can't believe in the year 2006 the ICL7107 is still the choice chip
> for this application.  Anyone have alternative suggestions?

  It sounds to me like coding it up with a PIC is probably your best
bet.  That's probably why the ICL7107 hasn't been replaced in the
market.  The functionality of the '7107 would likely only take an
afternoon or so to code up in a PIC.

         -Dave
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