On Tue, 29 Apr 2003 13:04:51 +0000, you wrote: >Hi, I've got a microcontroller sending a TTL logic to a 74L14 schmidt >trigger. I found out that the inverted logic high is somewhere 4.5v to = 4.6v. >Is there anyway I can make it output a perfect 5v? I assume you mean 74LS14... Use HCMOS instead - LSTTL is completely obsolete, as HCMOS is better in = all respects (speed, power, cost). If you're stuck with LS, you'll need a pullup on the output to get 5V. -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.