TXB0106: TXB0106 Voltage shift isn't correct between 3.3V and 5V

Part Number:TXB0106

Hi,

I used the TXB0106 to do the voltage shift between 3.3V and 5V. But the waveform isn't correct. I appreciate if you can give me some suggestions. Thanks.

Regards,

John

3.3V side waveform

5V side waveform

Schematic