CCS C Software and Maintenance Offers
FAQFAQ   FAQForum Help   FAQOfficial CCS Support   SearchSearch  RegisterRegister 

ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in 

CCS does not monitor this forum on a regular basis.

Please do not post bug reports on this forum. Send them to CCS Technical Support
Input level conversion

 
Post new topic   Reply to topic    CCS Forum Index -> General CCS C Discussion
View previous topic :: View next topic  
Author Message
rnielsen



Joined: 23 Sep 2003
Posts: 852
Location: Utah

View user's profile Send private message

Input level conversion
PostPosted: Fri Apr 06, 2007 12:14 am     Reply with quote
I have a device that runs on 3.3V. It's output is feeding a device that is running on 5V. The 5V device's spec. sheet states that it's input is a Schmitt Trigger and needs a minimum of 4V to see a high level on it's input.

This might seem to be a simple one for some but my brain has turned to mush since I've been trouble-shooting this one for a while and finally realized what my problem was. I didn't realize the input needed to be so high. Does anybody have an easy idea of how to convert the 3.3V device's output to go higher than 4V?

Ronald
PCM programmer



Joined: 06 Sep 2003
Posts: 21708

View user's profile Send private message

PostPosted: Fri Apr 06, 2007 12:34 am     Reply with quote
See my post on 3.3v to 5v level conversion in this thread:
http://www.ccsinfo.com/forum/viewtopic.php?t=23154
libor



Joined: 14 Dec 2004
Posts: 288
Location: Hungary

View user's profile Send private message

PostPosted: Fri Apr 06, 2007 4:29 am     Reply with quote
There's a very good summary on all these 3V-5V level issues, called 3V Tips and Tricks on the Microchip website.
3V Tips and Tricks
newguy



Joined: 24 Jun 2004
Posts: 1909

View user's profile Send private message

PostPosted: Fri Apr 06, 2007 9:57 am     Reply with quote
MAX3371. Bidirectional translation without the need for a 'direction' control input.
rnielsen



Joined: 23 Sep 2003
Posts: 852
Location: Utah

View user's profile Send private message

PostPosted: Fri Apr 13, 2007 9:33 am     Reply with quote
I tried out the MAX3371 and it works great. Tiny little buggers, though. I had to use a magnifying glass to see what I was doing.

Thanks for the tip.

Ronald
Display posts from previous:   
Post new topic   Reply to topic    CCS Forum Index -> General CCS C Discussion All times are GMT - 6 Hours
Page 1 of 1

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum


Powered by phpBB © 2001, 2005 phpBB Group