> *>By the way, isn't there anyone else out there that wishes all micro
> *>inputs were Schmitt trigger? Seems to me more desireable than just a
> *>comparator module thrown in here or there.
>
> The thresholds on an integrated Schmitt are hard to maintain in
> production. I think that you really want a window comparator with a RS
> latch at the output. It would be nice but it would add too much
> silicon so nobody is doing it imho.

I would settle for Schmitt trigger inputs with thresholds that vary a
bit from batch to batch, say as good as a 4093, 40106 or 74HC14, etc.
(despite the recent discussions on manufacturer variances). Would
make it so much nicer for handling "noisy" real world inputs and
analog like signals.

Yeah, I guess a full on window comparator, with or without latch, and
programmable thresholds (for each input?) would be adding way too
much.

--
Brent Brown, Electronic Design Solutions
16 English Street, Hamilton, New Zealand
Ph/fax: +64 7 849 0069
Mobile/txt: 025 334 069
eMail:  brent.brown@clear.net.nz

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