Re: Missing Schmitt Gates??

On Thu, 29 Nov 2007 17:23:52 -0800 (PST), James Arthur
<dagmargoodboat@xxxxxxxxx> wrote:

On Nov 29, 12:10 pm, D from BC <myrealaddr...@xxxxxxxxx> wrote:
On Thu, 29 Nov 2007 11:56:23 -0800, D from BC



<myrealaddr...@xxxxxxxxx> wrote:
On Digik*y it looks like one can get a:

schmitt inverter
schmitt NAND
schmitt OR

... and that's it?

How come no NOR, XOR, XNOR being stocked...??

Note: I haven't looked yet to see if those gates exist at other
sources.

I often take the approach "If they don't have it... it's too difficult
to get."

D from BC

Oopss...let me rewrite that..

I wonder why these gates look like they're not available at Digik*y ..
schmitt NOR
schmitt XOR
schmitt XNOR
and schmitt AND

D from BC

They're not part of the old CMOS line-up, but there are a few you've
missed:

a) I think some of the 74hc buffers may have had Schmitt inputs
(74hc244?). If not, Fairchild's TinyLogic buffers do: NC7WZ17.
b) the single-gate programmable parts NC7SZ57, NC7SZ58 have Schmitt
inputs. Make whatever you want!
or
c) make your own, as Frank suggested. That's what I did as an early
user of 74hc, before Schmitt-trigger parts were available.

Cheers,
James Arthur

Neato... I didn't know about the single gate programmable parts!

And speedy too.. 2.8nS @5V
http://www.fairchildsemi.com/ds/NC/NC7SZ57.pdf

Thanks


D from BC
.

Relevant Pages

  • Re: Missing Schmitt Gates??
    ... schmitt NAND ... I wonder why these gates look like they're not available at Digik*y .. ... I think some of the 74hc buffers may have had Schmitt inputs ... Fairchild's TinyLogic buffers do: ...
    (sci.electronics.design)
  • Re: Missing Schmitt Gates??
    ... schmitt NAND ... I wonder why these gates look like they're not available at Digik*y .. ... I think some of the 74hc buffers may have had Schmitt inputs ... Fairchild's TinyLogic buffers do: ...
    (sci.electronics.design)
  • Re: Missing Schmitt Gates??
    ... schmitt NAND ... I wonder why these gates look like they're not available at Digik*y .. ... schmitt XOR ... schmitt XNOR ...
    (sci.electronics.design)
  • Re: Missing Schmitt Gates??
    ... On Nov 30, 3:13 pm, Joerg ... Fairchild's TinyLogic buffers do: ... the single-gate programmable parts NC7SZ57, NC7SZ58 have Schmitt ... Selection guide here: ...
    (sci.electronics.design)
  • Re: Missing Schmitt Gates??
    ... James Arthur wrote: ... Fairchild's TinyLogic buffers do: ... the single-gate programmable parts NC7SZ57, NC7SZ58 have Schmitt ... or to keep the thing from staying linear & wasting power. ...
    (sci.electronics.design)