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[FAQ] TPS43340-Q1: TPS43340-Q1 EN pin logic threshold.

Hyun Jun Cho
Prodigy 100 points
Part Number: TPS43340-Q1

I’m evaluating TPS43340-Q1 on headunit project and found that the device is disabled when EN pin is ~1.0V. Is this expected behavior of the device’s EN pin logic threshold?

  • 0
    TI__Genius 10885 points
    Hi Hyun Jun Cho,

    Enable behavior between the min and max thresholds are likely not characterized. The limits defined in the datasheet are reliable, but behavior between these limits may vary from device to device. Looping in the device expert to confirm.

    Best Regards,
    Rick S.
  • 0
    TI__Genius 9380 points

    Hi Hyun Jun Cho,

     Rick is correct, The threshold limits are positioned to guarantee that at these levels the enable threshold will be crossed.

    According to the data sheet, if you pull the EN pin above 1.7V or below 0.7V you will cross the threshold for the enable circuit. A threshold between 0.9-1.1V is what we would expect.