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Original question:
Hi,sir:
I use SN74AVC4T245PW to convert signal level。 But I found signal measured sometimes seem strange.As you can see in pic 2, red rectangle 1 waveform STM2CTP1SCL_SCK has convert to CTP1_SCL_SCK successfully,but in red rectangle 2，It seems that the conversion is wrong.pic1 is Circuit diagram,pic 2 is signal waveform.STM3V3 is and CTP_IOVDD1 are basically equal(3.3V),signal frequency is nearly 250kHz,.can you help answer my following question?
1 What steps can I take to check the Red Square 2 waveform?
2 Is there a problem with the circuit diagram?
