App note: Interfacing a 3volt microcontroller to 5volt peripherals

in app notes by DP | 4 comments

It can be a challenge to interface 5volt stuff with modern 3.3volt microcontrollers like an ARM or MSP430. This app note covers several circuits for voltage translation on input, output, and bidirectional pins.

The interfacing of the 3-V MSP430x1xx and MSP430x4xx  microcontroller families to circuits with a supply of 5 V or  higher is shown. Input, output and I/O interfaces are given and explained. Worst-case design equations are provided, where  necessary. Some simple power supplies generating both voltages are shown, too.

This entry was posted in app notes and tagged , , .

Comments

  1. Nato says:

    Am I dense, or was the link left out of this post?

  2. Ian says:

    Sorry, that was my fault. I got distracted by the facebook plugin fail and forgot to save the past. Thanks for posting the link Miguel.

  3. boz says:

    I’ve successfully used a single 2N7000 MOSFET to accomplish the same thing a lot cheaper and easier to implement on a pcb than an IC if only 1 or 2 interface lines are required

Leave a Comment

Your email address will not be published. Required fields are marked *

You may use these HTML tags and attributes: <a href="" title=""> <abbr title=""> <acronym title=""> <b> <blockquote cite=""> <cite> <code> <del datetime=""> <em> <i> <q cite=""> <strike> <strong>

Notify me of followup comments via e-mail. You can also subscribe without commenting.