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SN74LV1T125: 3V3 pull-up resistor connected to input while VCC off

Andre Schmiel
Prodigy 10 points
Part Number: SN74LV1T125


Dear Sir/Madame,

I intend to use the SN74LV1T125 in my current design. The device will be used to translate 3V3 signals down to 1V8 signals. Unfortunately, there is a 3V3 pull-up resistor connected to the input while the VCC is off.

Is the device to handle this situation?

  • 0
    TI__Guru* 97066 points
    Hi Andre,
    If you check the Absolute Maximum Ratings table and the Recommended Operating Conditions table, you can see that the input voltage (VI) is independent of the supply voltage, and is rated to operate from 0 to 5V. This means that you can have a supply of 0V, and the input can be up to 5V without any unexpected issues.

    Short answer - yes.