TCA9545A: 3.3V to 2.5V level translation

Patrick Chen

Mastermind 8875 points

Part Number: TCA9545A

Hello

if main I2C is 3.3V, slave 4 ch is 2.5V. Could TCA9545A support this voltage translation? Thank you.

Patrick

over 6 years ago

0 BOBBY over 6 years ago

TI__Guru* 75391 points

Hey Patrick,

That will work.

You can see below your lowest value pass FET value is 2.5V which means TCA9545A requires a Vcc of ~3.7V or less in order to support level shifting. You can either supply TCA9545A with Vcc=2.5V or 3.3V and it will work.

Thanks,

-Bobby

Interface

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TCA9545A: 3.3V to 2.5V level translation