• 0

Electronics Explorer - Low Level of Static I/O when Vcc is 5V

Go to solution Solved by attila,


I am trying to use older PAL devices with a Vcc requirement of 5 V on the EE .


When using a Switch or Push Button in the Static I/O Module, the output levels are:


HIGH: 3.3 V 

LOW: 1.6 V


The low level is obviously too high.


Is EE's Static I/O not intended for 5 V?

Edited by Josh
Added Tags
Link to post
Share on other sites

2 answers to this question

Recommended Posts

  • 0
  • Solution

The digital IO pins use LVCMOS3V3 standard. These are supplied at 3.3V and have protection: 200 Ohm thermistor and clamping diodes to GND and to 3.3V

The low level in your experiment is probably pulled up to 1.6V by the device you are testing. 

Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now