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Altera_Forum
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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
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18 years ago

Yes to interface to 5v you will need some kind of level shifter,

a part such as 74LVC8T245 is easy to use and can be used in both directions. If you just need to drive 3.3V to 5V then in non critical applications then you can use a 74ACT241 and supply the 74ACT241 with 5V. Going from 5V to 3.3V you can use the

74LVC244 and supply at 3.3V

Regards

Uk Fixer