Forum Discussion

Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
18 years ago

Interfacing MaxII Micro to 5v TTL

Hello, I got myself a Max Micro kit, and I'm planning to interface this with a 5v TTL device. But I'm not sure if I\O pins are 5v tolerant. What can I do to interface a max micro to 5v TTL devices...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
18 years ago

Use a transistor supplied at +5V if you need to increase the voltage from 3.3V to +5V and use a resistor partition scheme (e.g. 560ohm and 1kohm) if you need to decrease a signal from 5V to 3.3V.

;)