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Original question:

TCA9800: some questions about TCA9800

TCA9800: supports 1.8V to 1.8V level shift?

Jerry Chen
Expert 5110 points
Part Number: TCA9800

Hi team,

My customer use case is, I2C master is 1.8V, slave is selectable 1.8V or 3.3V. I'm thinking about TCA9800, whose B side is for the 1.8V master. And, I will apply a 1.8V/3.3V mux on VCCA. slave has resistive pull up, so I must use the A side to support this. Does TCA9800 support this application? I see some other I2C level shifter require VCCB must be higher than VCCA.

Thanks.