RTL Logic

[Dwight K. Elvey]

Hi
 4000 series is good to around 15 volts someplace as I recall.
I don't remember how low it goes but it seems like 2.5v someplace.
It does run slower at lower voltages and even at 5 volts, it
is really slow for logic. It really depends on the application.
Dwight

>From: "Scott Stevens" <chenmel at earthlink.net>
---snip---
>
>Doesn't 4000-series CMOS logic operate pretty well at non-5 volt levels
>if powered to such levels?  I haven't used any in years, but all the
>'building block' logic components are available, i.e. the 4049 and such.
> A company I worked for made a muscle stim device out of a single 4000
>series 'hex converter' using feedback to make multivibrators, crude
>comparators, drivers, etc. out of the gates.  It wasn't powered at 5
>volts, the whole thing ran from a 9 volt battery.  The logic thresholds
>for 4000 CMOS are 1/3 and 2/3 of VCC, for whatever VCC you supply, if I
>recall.
>
>