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DS125BR820: fail at setup at start time and setup at stop time

daniel
Genius 5095 points
Part Number: DS125BR820


Hi Team,

For DS125BR820,we measure the i2c parameters under EEPROM mode and found the setup time at start and stop condition are shorter than spec.

On this path, only re-driver and EEPROM with pull-up 1k ohm. So, it should be controlled by re-driver. Also, no improve if we increase the pull-up resistor.

Any possible reason may cause this issue? How to improve this issue?

Thanks

Spec:

1.  t setup at start: 1.41us, spec: min.4.7us---Fail

2. t setup at stop: 1.445us, spec: min. 4us