• State Resolved
  • Locked Locked
  • Replies 1 reply
  • Subscribers 21 subscribers
  • Views 177 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

SN74LVC1G97-Q1: output peak current capability

Michael Daimer
Intellectual 2015 points

Part Number: SN74LVC1G97-Q1

Hello experts,

what is the peak current capability of the outputs of SN74LVC1G97-Q1? The datasheet only provides a continuous current (+/-50mA).

The use case is a capacitor (1nF), which gets discharged (3.3V if loaded), when the output of the device is asserted to low.

Currently customer has implemented resistor to limit the current (47 Ohm currently), but would like to decrease it to 10 Ohm.

The peak current with 10 Ohm resistor is at 87mA, when also taking into account the internal resistance of the gate of ~28 Ohm accordign to datasheet.

If this the 28Ohm cannot be considered on top, the peak current would be 330mA.

 

Unfortunately the datasheet also does not provide the dynamic thermal impedance, it is hard to take a conclusion, if this is OK or not.

 

Thanks for your support and advise!

Michael

  • +1
    TI__Mastermind 34085 points

    Hi Michael,

    We don't have any testing for peak current capability, so there's no useful judgement we can provide here.

    The only thing we can say is exceeding the absolute maximum continuous output current (50mA) or total current (100mA) ratings might damage the device. We recommend leaving a resistor large enough to limit the output current such that it will not exceed 50mA.

    Best,

    Malcolm