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MAX3243: The PIN RIN1\RIN2\RIN4\RIN5 of MAX3243EIPWR do not use,could I let the Pin not connet or tie to GND or VCC?

chen chen35
Intellectual 875 points
Part Number: MAX3243

Hi 

    I usd MAX3243EIPWR in my project，please help me to check the schematic.I did not used the RIN1\RIN2\RIN4\RIN5 PIN .Could I  let the Pin not connet or tie to GND or VCC? Please give me some advise.Thanks a lot！

  • 0
    TI__Guru 62910 points
    Hello,

    It is OK to leave unused RIN ports disconnected. There is a 5-kOhm pull-down resistance on each of these inputs that will bias them to ground in this case. Connecting them externally to ground or to VCC would have been OK as well, but this is not required.

    Regards,
    Max