3.3/5v interfacing

[leri]

Hi
I'm trying to connect two 5V IO devices to a third device which works at 3.3V IO, and is not "5V-IO-tolerant", in a bus topology. Can anybody suggest me of a safe way to interconnect these devices?

Thanx

 

[jbartos]

Suggestions:
1. Opto interfaces
2. Electronic transformers
3. DC-DC converter
4. Potentiometer?
5. Etc.

 

[MrSpock]

Your best bet is a DC-DC converter............Try PICO or DALE but there are many good manufacturers of these devices.