3V <-> 5V Level shifter ?

From: Martial Chateauvieux (Chawig_at_T-Online.de)
Date: 01/28/05

  • Next message: CBarn24050: "Re: cpld interface with AT mega8" 
    Date: Fri, 28 Jan 2005 23:03:59 +0100

            Hi,

            I want to connect a GPS Smart antenna SAM LS from u-blox, to the
            UART of an atmega128 running under 5V.

            Unfortunately the GPS runs in 3V and has 3V compatible IOs.
            I set up a 3V regulator already for the power supply. Can someone
            explain how to build a level shifter from 3V to 5V with a transistor ?
            (How do I choose it, how to connect it ?)

            any better idea ?

    Thanks
    Martial Chateauvieux

            

  • Next message: CBarn24050: "Re: cpld interface with AT mega8"