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TCAN1043A-Q1: Can pin INH outputs high when only Vsup is applied?

Oliver Tang
Genius 12290 points
Part Number: TCAN1043A-Q1

Hi Team,

Can pin INH outputs high when only Vsup is applied and WUP is received while VIO and VCC are not present? It looks like INH is in high-impedance state.

BR,

Oliver Tang

  • +1
    TI__Guru 53575 points

    Hi Oliver,

    The INH output is high when the device is in any operational mode. So as long as Vsup is supplied and the transceiver is in Normal, Silent, Standby, or Go-To-Sleep modes, the INH output will be driven to the Vsup level (open source output). INH will be turned off when the transceiver moves to Sleep mode. This can occur from a normal mode change using the digital input pins (EN, nSTB) or from an undervoltage event on Vcc or Vio. Both cases will put the device in Sleep mode and thus turn off INH. Because INH drives to the Vsup level, it is also dependant on this supply. If Vsup is not available, the device is considered powered-off and INH will be high impedance. 

    See the state diagram in Figure 8-4 for a graphical representation of this explanation. 

    Let me know if you have any more questions.

    Regards,
    Eric Schott