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Original question:

TCA9555: Output port jumps back to default value after configuring it to 0

TCA9555: May TCA9555PWR can direct replace MAX7311AUG?

Chen Bogey8
Mastermind 9990 points
Part Number: TCA9555

Hi Sir 

I use cross reference to search MAX7311AUG replace part and find TCA9555PWR are P2P.

May TCA9555PWR  can direct replace MAX7311AUG? or something i need to remind my customer?

                                                                   Bogey

  • 0
    TI__Mastermind 49410 points

    Hey Bogey,

    The two devices do look to share some similarities however I do notice two major differences.

    1) The register map for the MAX device has 2 additional registers for timeout and factory reserved register.

    2) The MAX device has more address options than our device

    -This may be an important detail which means depending on how the customer schematic is set up, our device may not be a suitable replacement. If you have a schematic/block diagram you can share of the specific socket we are looking to replacing then I can help you to confirm/deny this.

    -Bobby

  • 0 in reply to BOBBY
    Mastermind 9990 points

    Hi Bobby 

    Since TCA9555 can't be use, may you have other suggestion part?

                             Bogey

  • 0 in reply to Chen Bogey8
    TI__Guru 62910 points

    Bogey,

    TCA9555 would be as good of an option as anything else here.  None of our IO expanders have a bus timeout feature or this many programmable address bits.  Can you please find out if these are really needed in this application?

    Regards,
    Max