[sdiy] Best way to interface 3V and 5V logic ICs on the same circuit ?

[Rainer Buchty]

On Sun, 15 Jul 2007, jbv wrote:

>What is the best way to interface different logic ICs on the same
>circuit, some using 5V and others using 3V (like a uC using 3V
>and a DAC or external RAM using 5V) ?
>
>In my archives I found an old AMD app note advising to use a
>voltage level translator such as the 74LCX244 / 245, but I
>downloaded that app note years ago and there might be some
>fresher options...

Have a look at this: 
	http://www.interfacebus.com/voltage_threshold.html

Depending on your specific application, however, you might even be ok 
with HCT instead of the more costly LCX/LV alternatives.

Rainer