Dear team
We found I2C tr waveform between TI, TCA4311ADGKR and NXP, PCA9511ADP are difference, TI close the Max limit criteria for 400kHz and rise time is non-monotonic compare with NXP part.
Sometime I2C not acknowledge for TI IC.
I2C tr
|
IC 204 |
Min Spec |
Max Spec |
Actual Test |
|
NXP : PCA9511ADP |
20 ns |
300 ns |
144 ns |
|
TI : TCA4311ADGKR |
272 ns |
I2C tf
|
IC 204 |
Min Spec |
Max Spec |
Actual Test |
|
NXP : PCA9511ADP |
15.49 ns |
300 ns |
104 ns |
|
TI : TCA4311ADGKR |
76 ns |
Could you pls kindly give a reason why TCA4311ADGKR waveform look bad when operate at 400KHz I2C fast mode.
Application circuit is as following, pull up resistor is 10Kohm for both in and out pins
PCA9511ADP
TCA4311ADGKR
