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MAX3243: Pull-up resistors

Antony Lin
Genius 13480 points
Part Number: MAX3243

Hi,

May you check if resistors from R590 to R594 is necessary or not?  What is the purpose of them?  Can we remove these pull-up resistors?  Thanks!

Antony

  • 0
    TI__Guru 62920 points
    Hi Antony,

    The pull-up resistors are not required by the transceiver, since the output structures are push-pull (rather than open drain). However, in some cases users prefer to use pull-up resistances so that there is a default "high" state on these signals if not driven by something else (either by the transceiver or by the MCU/processor/UART interfacing to it). Let me know if this is not clear.

    Regards,
    Max