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TCA6418E: questions about pin terminations

Kazuhiko Hirano
Genius 15078 points
Part Number: TCA6418E

Hello,

Q1:
When RESET_ pin is not used, how much ohms resister does TI recommend to pull up the RESER_ pin to Vcc?

Q2:
When INT_ pin is not used, can this pin be left floating (unconnected anywhere)?

Q3:
How unused GPIO pins are terminated?


Best regards,

K.Hirano

  • 0
    Guru 316940 points

    1. For high-impedance CMOS input, this does not matter. You can use 0 Ω.

    2. Unused outputs can be left open.

    3. Unused outputs can be left open. Unused inputs should have a pull-up or -down resistor; you can use the internal pull-down, which is enabled by default.