AVR-Chat

I like 74LCX125. Gives you six converters in a  package.
They do it right! You can power them from 3.3V and both
input and output are 5V tolerant. This lets you convert
both ways.

Jim


On Sun, 21 Jan 2007 17:17:11 -0600
 Thomas Keller <tjkeller1@alltel.net> wrote:
>     At a guess,m substitute a single 3.3 V zener diode
> for each voltage 
> divider.    Ought to work (I think).   Only potential
> problem I can see 
> is it could end up overloading the AVR outputs.
> 
> tom
> 
> kernels_nz wrote:
> >
> > Hey guys,
> >
> > Anybody know what the best way is to interface a 5V
> output on my
> > Mega64 to a 3V input on a Nordic RF IC ? The Nordic
> datasheet
> > specifies a max input voltage of VDD + 0.3V (3.3V)
> >
> > Best way I could come up with was a voltage divider on
> each line, but
> > theres six lines, so thats 12 extra resistors !
> >
> > I need to run the Mega at 5V because of interfacing to
> other 5V
> > components, so running it @ 3V is not an option
> unfortunately
> >
> 

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