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DS15BR400 - ESD Protection

Jon Wagner
Prodigy 30 points

Other Parts Discussed in Thread: DS15BR400

Hello - I am currently analysing a circuit with the DS15BR400 and would like to better understand what type of esd protection this device contains. Are the ESD diodes on the output pins? Also, in regards to the maximum voltage of Vdd+0.3V is it possible to exceed this voltage without damaging the part for a short duration if the current is below the 40mA rating?

Thanks,

Jon

  • 0
    Prodigy 30 points

    How do you get someone from TI to answer your question?

  • 0 in reply to Jon Wagner
    TI__Genius 13475 points

    Jon

    My apologies for having missed this question earlier.

    The ESD protection circuit can be thought of as reverse biased diodes connected between each pin and the Vdd and Vss rails.   If the potential at an input pin goes outside of the supply rails, then it forward biases the diode and the diode absorbs the energy of the excursion.

    We have a table of absolute maximum ratings on each datasheet.  So long as these are not exceeded, the device will not be damaged, although it may not operate properly with those parameters.   In the case of the DS15BR400, the Absolute maximum for inputs is Vdd+0.3V - If the device is subjected to voltages outside of this range, it is not guaranteed that it will not be permanenetly damaged.