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TRS3232E-Q1: When no power supply is applied

R.Fukunaga
Expert 1625 points
Part Number: TRS3232E-Q1

Tool/software:

Hi all,

Is it a problem that voltage is applied to the input and output when the power supply voltage is not applied?
It is not written up to Vcc, so I understand that it is fine.

Also, if there is no problem to apply, is there any leak current?
I would like to turn off the power to use it because it is in a low consumption state.
I think that if there is leakage current, the consumption current will rise.

Best Regards,

Ryusuke

  • +1
    Guru 283700 points

    Only the receiver output limit mentions VCC. The other pins allow voltages above VCC (and have no clamping diode to VCC, so there is no large leakage).

  • +1
    TI__Guru 60520 points

    Hi Ryusuke,

    R.Fukunaga said:
    Is it a problem that voltage is applied to the input and output when the power supply voltage is not applied?

    This should be okay if it's within the absolute max ratings. As Clemens pointed out the receiver output is the only one that scales with Vcc. 

    R.Fukunaga said:
    Also, if there is no problem to apply, is there any leak current?

    Our datasheet doesn't technically spec the leakage current when Vcc is not present. So the I_IH and I_IL specs are not guaranteed when Vcc is floating/GND. 

    -Bobby