TCA9509: Can this be used as an I2C repeater if both supplies are 3.3V?

Hi Bobby,

Thanks for the quick reply. My customer had already chosen TCA9509. Would the TCA9306 work? The smaller package options would be ideal.

Hey Michael,

"Would the TCA9306 work?"
I want to be sure, did you mean the PCA9306 or the TCA9509? (Or our pre RTM TCA9306?)

-Bobby

I did mean PCA9306, thanks for clarifying.

Hey Michael,

So PCA9306 is a level shifter, if you use the device to be Vcc1=Vcc2 on this device then the only thing beneficial about this is you could use the enable pin to disable it kind of like a switch.

I need to be very clear about this, PCA9306 is not a true buffer meaning it does not redrive the signal. If the customer is trying to seperate/isolate the bus by disabling the device so keep the downstream I2C segmented from the main I2C bus then this device will work. If the I2C bus is heavily loaded and a redriver/buffer is needed then PCA9306 is not a suitable solution.

Thanks,
-Bobby

Bobby,

Thanks for that explanation. The customer does need a true I2C buffer.

Their specs are: 2mm x 2mm or smaller, 3.3V on both supplies, 400kHz max SCL

Do we have anything that fits? I want to make sure I'm not missing something.

Thanks,
Michael

Hey Michael,

Could you please check your email? I've sent you a message for further details.

Currently we do not have a solution but may put something like this in our backlog.

Thanks,
-Bobby