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TCAN1043-Q1: About the termination of the WAKE pin

Junya Kato
Expert 1635 points
Part Number: TCAN1043-Q1

Hello Team,

When not doing LWU,it seems to connect the WAKE pin to VSUP in the datasheet.
If VSUP is momentarily interrupted for more than tWAKE_HT at sleep mode, will it be judged as LWU by WAKE pin and will enter standby mode?
Is it possible to connect the WAKE pin to GND? Is it difficult because power is not supplied to the WAKE circuit?
If GND is OK, there is no worry about this. Looking at Figure 24 "Local Wake Up – Rising Edge", it does not seem to be a problem.

Best regards,
Kato

  • 0
    TI__Guru 62920 points
    Hello Kato-san,

    Yes, if WAKE toggles state for more that tWAKE the device will exit sleep mode. It is OK to tie WAKE to GND if this is a concern. The only negative impact would be that the ISUP current will be higher by 1-2 uA in the sleep state.

    Regards,
    Max