ISO6421: ISO6421 Level Shifter

Batuhan Kaya

Prodigy 160 points

Part Number: ISO6421

Hi TI Team,

I'm using ISO6421 in my isolated CAN application and utilizing its level shifting feature (3.3V to 5V translation).

Application Context:

I'll have two CAN-BUS variants:

Isolated CAN (using ISO6421 with isolation)
Non-isolated CAN (same PCB layout, different variant)

Question:

Can I use ISO6421 without its isolation function - purely as a level translator (3.3V to 5V) for the non-isolated variant?

This would allow us to use the same PCB design and component placement for both variants, only changing the population/configuration.

Is this a supported use case, or should I use a dedicated level translator for the non-isolated variant?

Regards

5 months ago

+1 Varun Kumar 5 months ago

TI__Genius 16340 points

Hi Batuhan,

Thanks for reaching out and providing detailed description of your application.

To answer your question, YES you can use ISO6421 as a level shifter in a non-isolated application without any issue. The ISO6421 will perform exactly the same as in an Isolated application.

Regards
Varun

0 Batuhan Kaya 5 months ago in reply to Varun Kumar

Prodigy 160 points

Hi Varun,

Thanks for your reply and help.

Regards,

Batuhan

Isolation

Isolation forum

ISO6421: ISO6421 Level Shifter