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SN74LXC2T45: UART to RS-485 schematic review

Part Number: SN74LXC2T45
Other Parts Discussed in Thread: TXU0202

Tool/software:

Hi Team,

Please help to review the design of SPI to RS485

If the schematic has any issues,please tell me.

  • The R/RXD signal must go in the other direction. Use the TXU0202 instead.

  • Hello Allen,

    The LXC2T45 uses DIR pin to control the direction of data. Since you have DIR connected to ground, all your data will flow from B-ports to A-ports. 

    Like Clemens, I would recommend the TXU0202 for UART applications

     

    Regards,

    Josh