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TMUX1511: Tolerant voltge on input/output pins

Takahiro Saito
Expert 5315 points
Part Number: TMUX1511

Hi team,

Could you clarify how much voltage input/output can tolerate? Should I refer "VS or VD" and "VS_off or VD_off" in the recommended conditions?

The reason why I ask you is the description in 8.3.2 which the input/output can tolerate up to 2×VDD is confusing for me.

If this description is true, the condition VDD = 0, any voltage can't be appied to input/output.

Regards,

Saito

  • 0
    TI__Expert 3900 points

    Hi Saito-san,

    When the device is powered from 1.5V to 5.5V, the input/output can range from GND to VDD*2, with a maxium of 5.5V.

    Example 1: If the TMUX1511 is powered at 1.5V, the input/output can range from 0V to 3V.

    Example 2: If the TMUX1511 is powered at 3V, the input/output can range from 0V to 5.5V.

    Example 3: If the TMUX1511 is powered at 5.5V, the input/output can range from 0V to 5.5V.

    The description in section 8.3.2 refers to these examples. It will be updated to mention the device being powered.

    If the TMUX1511 supply voltage is less than 1.5V (below the recommended operating supply) the input/output can range from 0V to 3.6V.

    Example: VDD = 0V, the input/output can range from 0V to 3.6V.

  • 0 in reply to Dakotah
    TI__Expert 5315 points
    Hi Dakotah,

    Thanks. It's clear now!

    Regards,
    Saito
  • 0 in reply to Takahiro Saito
    TI__Expert 5315 points

    Hi Dakotah,

    I appreciate if you could consider the following expression in the table 6.3 of the datasheet.

    This description doesn't contain that the input/output acceptable voltage is 2*VDD in the condition of  VDD is more than 1.5V and less than 2.25V.

    Regards,

    Saito

  • 0 in reply to Takahiro Saito
    TI__Expert 3900 points

    Hi Saito-san,

    Thanks for some feedback. Table 6.3 has been edited and looks like the following:

    The max voltage is listed as VDD x 2, with a footnote that the maximum can be 5.5 V. This will be updated on the web version soon.

    Does this help clarify any confusion? 

  • 0 in reply to Dakotah
    TI__Expert 5315 points

    Hi Dakotah,

    Very helpful! That became clear.

    Thank you for considering to modify the datasheet.

    Regards,

    Saito