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TIC12400-Q1: Maximum Current rating for all pins

Jerald Roiston
Prodigy 10 points
Part Number: TIC12400-Q1

HI Team,

Please clarify my below queries.

  1. I'm using this IC for digital input sensing. In this case , what will be the maximum input current that should be considered for the sinking input and sourcing input?
  2. Please suggest the resistor value if I'm connecting an active high input that has a voltage of 12V and consider the current value with respect to the first question. 
  3. Or I wet setting current is the maximum input current? Pls clarify. 

  • 0
    TI__Mastermind 19310 points

    Hi Jerald,

    The device is designed to work with switches connected directly to GND or to the 12V supply voltage without the need for external current limiting resistors and the device will source or sink current according to the levels configured in the device's registers. The current source and sink circuits require some amount of voltage headroom in order to provide the full amount of current, so there is some variance in the actual current levels as a result of the supply voltage level, and a low supply voltage will have a reduced current level.  The datasheet provides the min and max current levels for the different settings and voltage ranges.

    External resistors and capacitors are recommended to be used on the input pins to enhance the ESD protection level, but the purpose of these is not related to your current limiting question.  The ESD specification table lists the recommended resistor and capacitor values for the levels specified in the datasheet, but different levels of protection can be achieved with different resistor and capacitor values.  More information on how to select the right component values for your application can be found in this test report document. (Link)

    Regards,

    Jonathan