TMUX1247: High Impedance with no VDD?

Trevor Kunz

Part Number: TMUX1247

Tool/software:

Hello,

If there is no power present (0V) on pin 2 (VDD), does pin 4 (D) enter high impedance mode or does it remain connected internally to either pin 3 (S1) or pin 1 (S2)?

Thanks!

12 days ago

0 Nir Gilgur 12 days ago

TI__Expert 7365 points

Hello Trevor,

The TMUX1247 doesn't have powered off protection. The pins will be at a floating state when the device is not powered.

Are you looking for a mux that has that kind of feature? I might be able to provide you a suggestion if you can elaborate on the application.

Thanks,

Nir

0 Trevor Kunz 12 days ago in reply to Nir Gilgur

Prodigy 10 points

Hello Nir,

Nope, I need a mux that is disconnected between D and S1/S2 when the device is not powered, which it sounds like the TMUX1247 does since the pins will be at a floating state.

Thanks,

Trevor

0 Nir Gilgur 12 days ago in reply to Trevor Kunz

TI__Expert 7365 points

Hello Trevor,

Understood, I can't guarantee if this will be the case if the pins are floating.

Floating pins can be unpredictable, their state is uncertain.

Thanks,

Nir

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TMUX1247: High Impedance with no VDD?