Re: can i use 5V device as this ways?
Its a 5V line driver.
V_IH(min) = 2V
The input current for high and low does not exceed the 4mA drive
current of the LPC.
You can drive this part fine with the LPCs 3.3V I/O logic.
If you want to interface 5V outputs to the LPC, you will need to
use a 5V tolerant 3.3V buffer between the 5V I/O and the LPC.
If you have a few lines you want to read, you can use TinyLogic
parts from Fairchild. As soon as you get to 8-bits, you can
use 5V tolerant 3.3V '244 buffers. Eg. TI LCX (I think),
Pericom LPT, etc. Lots of mfgs have them.
If you need bidirectional protection, you can look at