TXS0104E: I2C issue

Show the schematic of the board, and oscilloscope shots of the signals.

Hi Vishal,

Can we get more details on the setup?

Hi Clemens,

Thanks for update.

Let me clear your doubt.

Actually our project is a IoT gateway. Number of sensors connected on board using I2C interface and other side is we are sending data over the  cloud and satellite.

Ses the below image.

one side is IMU sensor and other side processor. so IMU is working on 1.8v and and our processor is working on 3.3v.

On baord having 6 slaves.all sensors are working fine but when we are putting for long run test that time we are getting such type of error.(I2C transfer not succesfull/I2C timeout error).

Can you please suggest me on that ??
why we are facing such type of issue after long run??

See below capctured waveform of SCL and SDA signal

Issue is not capcturing because that issue occuring within 48 hours, sometime 24 hrs etc.

The waveforms and the schematic look OK.

Please note that the TXS has integrated pull-up resistors and does not need external ones, but those should not actually be a problem (they just waste some power, and increase the low voltage by a little bit).

As far as I can see, the problem that leads to the timeout is probably not caused by the translator.

(It would be useful to have a scope shot of the problem first occuring …)

hello Clemens,

Thanks for you valuable input.

I am tryning to capcture that wavefrom while issue was occuring  and unable to capcture it. Even i put DSO on single mode at night time .

do you thinks it is access time issue?? what is solution according to your past experience.

why this issue occuring at 1.8v side only why not at 3.3V side?

Please help to solve the issue and its very critical deadline for me.

IMU is important because we are setting satellite beam. 

regards,

vishal kalmani

I²C timeouts can be caused by anything.

In practice, you have to reset the slave, and try again.

Hi Clemens ,

We know that method but we want exact reason why it is occuring ??