[sdiy] Multivibrator IC questions...

[Nils Pipenbrinck]

James R. Coplin wrote:

> So, there are a kazillion of these chips out there.  Is there really 
> any difference or would the above one work out fine?  They come two to 
> a chip so for a couple of ICs I would get 4 independent processing 
> thingees.  Are there other approaches I should be considering, 
> pitfalls etc.? Thanks!
>

I've made good experiences with the NE558 quad timer. You get twice as 
much monoflop blocks for the same price as a 74HC123. The  circuit is a 
bit simpler and doesn't offer all the trigger inputs and clocks, but if 
you don't need those it might be a good alternative to look at.

(can't tell anything about switching noise though. I never run into 
problems, but the circuits I build with it where anything but sensitive 
to noise).

  Nils