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LM80: Question about I2C lockup issue

Part Number: LM80

Hi team,

    My customer use four LM80 devices on the board and they all have the following issue. After writing LM80's configuration, customer read back the voltage, temperature value every 2 seconds. The device work normally at first and then I2C would be lockup. Customer tried to hardware reset (30ms) the device, sometimes it works, sometimes rewriting the configuration failed.

   Could you please help to check the possible cause for the lockup issue? How to recover from the issue? Any action should be done from customer side? Thanks a lot!

Best Regards

Zhengquan Lu