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TXB0104: Uart Data Corruption

Ayush Jain1
Prodigy 250 points
Part Number: TXB0104

I have interfaced GSM modem SIM900 with 3.3V micro controller. GSM modem requires UART signal voltage at 2.8V. So I have used level shifter TXB0104 to achieve this. It is observed that transmitted data(AT Commands) gets corrupted. I have read on others blogs that TXS0104 can solve the problem as it supports open drain architecture. I just wanted to confirm if TXS0104 will solve the problem or not.

  • 0
    Guru 317450 points
    What has open drain to do with this? Typcially, both the µC and the modem would use push/pull signals for the UART.

    What kind of corruption? Anything wrong on an oscilloscope trace? Is it possible that the modem's and µC's baud rate clocks are not synchronized?