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SN65176B: SN65176B Operation when one output is grounded

Ben24
Prodigy 10 points
Part Number: SN65176B

TI,

Pertaining to the SN65176B differntial output, what happens to the opposite line when A (HI) or B (LO) is grounded? If B is shorted to ground does the output of A double it's amplitude so the differential voltage across B to A looks the same as if B was not shorted to ground. For example, if grounded B to A would be 0V to 5V  instead of -2.5V to +2.5V like it normally should be from B to A? Or does A still come out to be +2.5V with reference to ground and B is 0V with reference to ground? Thank you for your help.

  • 0
    TI__Guru 62910 points

    Ben,

    The differential output level is not regulated by the device and will vary with load conditions.  You could think of the A and B outputs as independent push-pull drivers that are controlled with inverse/opposite logic states.  Figure 19 in the datasheet gives a simplified schematic diagram of the IOs - I think if you reference this it may help you better understand how the device would react to different scenarios.  Let me know if you have any questions on this.

    Regards,
    Max