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TXB0304: spec check

GARETH OU
Guru 10585 points
Part Number: TXB0304
Other Parts Discussed in Thread: TXU0102

Hi

Customer measurement found that U22 PIN8 has an abnormal waveform when USB is abnormal (USB_OC#_abnormal.png) U22 uses TXB0304RUTR

Changing RA43 to a smaller size (1K for testing) can solve this problem

May I ask how much should be changed to RA43 and RA44? Is there any reference material?


  • 0
    Guru 295240 points

    The TXB must not be used with strong pull-up/-down resistors (< 20 kΩ); see section 8.4.2 of the datasheet.

    For unidirectional signals, you should use a unidirectional translator like the TXU0102. Are the directions of the two GPIO signals fixed?