Good afternoon,
There is the requirement to include some TCA9534 devices on our design, and to start developing a simple driver for it, I have one IC soldered on an expansion board.
The problem is that the device does not respond to I2C messages, not does it show up on an I2C scan. I have more devices connected to the same I2C bus (no address conflict) that show up as expected on a bus scan. I have connected A0...A3 to GND. I'm using a 3.3v supply, and I've tried 1.1kOhm and 10kOhm pull up resistors.
I have ordered TCA9534PWR from the manufacturer, but the on-chip part number looks slightly different than "TCA9534". Could you confirm that the IC is correct? I'm starting to question whether I'm looking at the right datasheet...
Please find a picture attached.
Best regards.