ISO7721: VCC1=3.3V & VCC2=5V

Hello,

Thank you for your question.

Beida Song said:

For ISO7221x, if the VCC1=3.3V and VCC2=5V is possible in application?

Yes, digital isolators can be supplied with different voltages within the recommended operating conditions on both sides of the device. Please check this FAQ for more details: [FAQ] Can I power the two sides of a digital isolator with different voltages? - Isolation forum - Isolation - TI E2E support forums

Regards,
Aaditya Vittal