Go Down

Topic: Invert output from 74hc139 2:4 decoder (Read 898 times) previous topic - next topic


I need a 2:4 decoder and the only one I can find is the 74hc139, but it's outputs are low/on high/off.
I need this reversed because the outputs from the decoder will drive Clock inputs to 4 74hc374's flip flops, which are active high.

Do I use some pnp transistors (and resistors?) to invert the signal, or is there a better way?

Thanks in advance.
http://en.wiktionary.org/wiki/magagna <-- My last name.  Pretty apt.


Formal verification of safety-critical software, software development, and electronic design and prototyping. See http://www.eschertech.com. Please do not ask for unpaid help via PM, use the forum.


http://en.wiktionary.org/wiki/magagna <-- My last name.  Pretty apt.

Go Up

Please enter a valid email to subscribe

Confirm your email address

We need to confirm your email address.
To complete the subscription, please click the link in the email we just sent you.

Thank you for subscribing!

via Egeo 16
Torino, 10131