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TCA9534A: I2c addr issue 0x20(7bits) respond to 0x38(7bits)

Part Number: TCA9534A
Other Parts Discussed in Thread: TCA9538, , TCA9534


I've on my board 2 tcs9534A and I try to discuss with them at adress 0x20 and 0x21 without any results.

These adresses are in the datasheet page 19 table 2.

I consults some of your forum and I have read than some customers have an identical issue. The parts respond to address 0x38.

I try these adresses 0x38 and 0x39, now your tca9538 answer.

Please con you explaine why the datasheet give address 0x20 and we have to send address 0x38.

Thanks a lot