Lpc2000

Short answer, NO.

For any electrical part you can look in the schematics, find the "DC 
ELECTRICAL CHARACTERISTICS" section, and check the "INPUT HIGH 
VOLTAGE".  In your case it's minimum 3.4V, so the 3.3V output from the 
LPC2138 won't work.  Odd, because most 5V parts have an input high 
voltage around 2.5V, as it is with most of my parts on my design.

--- In lpc2000@yahoogroups.com, "fredrikssonjohan" <johan@s...> wrote:
>
> Hi!
> 
> Sorry if this is a stupid question, but I haven't found any good info
> about the UART levels so I better ask!
> 
> Need to connect a LPC2138 to a Maxim (Dallas) DS2480B which is on 5V.
> Can they talk as it is or do I need a 3.3 to 5V buffer between?
> 
> Thanks for any help!
> 
> Cheers
> /Johan
>