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TS3USB221A: Can TS3USB221A keep a USB data path active by default when VCC = 0V?

Abdullah Dogan
Prodigy 10 points

Part Number: TS3USB221A

Tool/software:

Hello,

I'm designing a USB 2.0 switching circuit using a USB switch. In my case, the switch IC might have VCC = 0V, and I need at least one data path (e.g., port A) to remain connected (pass-through) by default under this condition.

In other words, the absence of VCC is actually my switching condition — if VCC = 0V, I want the USB path to stay active automatically.

My question is:

Point right Does the TS3USB221A allow one data path to remain active (connected) by default when VCC = 0V?

Additionally:

  • Does it go into high-Z or isolate the lines when unpowered?

  • If not suitable, are there any TI-recommended USB switches that support this behavior?

Thanks in advance for your help.

Best regards,
[Abdullah DOGAN]