TCAN1043A-Q1: TCAN1043 INH Pin remain high during sleep mode

Hi Hemant,

Thanks for reaching out on E2E.

There are a variety of reasons TCAN1043A could be waking up and asserting INH high:

The main methods are:

• CAN bus Wake up pattern (WUP)
• Local wake up on the Wake pin
• nSTB low-to-high transition
• Unstable VSUP such that it goes below the undervoltage threshold (~4V)

Please confirm if one of these various wake methods is causing the issue. If you are still encountering INH going high randomly, please provide a schematic, an image of the top of the device, and a waveform with INH, VSUP, nSTB, and CANH.

Let me know if that helps or if you have additional questions!

-Ethan

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Hi Hemant,

Please provide the rest of the schematic (if possible) and the other information that I requested so I can best assist your problem.

Best,

Ethan