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TXS0108E: Question about TXS0108EPWR output undershoot

Part Number: TXS0108E

Hi team,

     My customer use TXS0108EPWR device and find the output B has large undershoot as below. They tested A6 input and B6 output waveform as below. A6 input has 20kohm pull-up resistance and B6 output has 4.7kohm pull-up resistance. As customer directly connect output B6 with MCU GPIO pin, they cannot add serial resistance or bypass capacitor. Could you please help to check is there any other way to eliminate or reduce the undershoot? Thanks a lot!

schematic diagram:

B6 output waveform:

A6 input waveform:

Best Regards

Zhengquan Lu