TPS65217: Unused MUX_OUT

Hirotaka Matsumoto

Part Number: TPS65217

Hi all

Would you mind if we ask TPS65217?

Could you let us know the termination of unused MUX_OUT pin?
Is it possbile to leave open?
We assume that it is good to set AC coupling 100nF with GND.

Kind regards,

Hirotaka Matsumoto

over 6 years ago

0 Gordon Varney over 6 years ago

TI__Genius 9380 points

Hirotaka-san,
I have forwarded your question to our product expert. Thank you for using E2E.

0 Brian Berner over 6 years ago

TI__Mastermind 30280 points

Matsumoto-san,

The TPS65217 Schematic Checklist (www.ti.com/.../slva686) says it is OK to leave MUX_IN and MUX_OUT floating if they are un-used.

The default value of the MUX[2:0] bits in MUXCTRL register (0x09) are 000b, which means "MUX is disabled, output is Hi-Z."
There is no risk in floating the MUX_OUT pin.

The circuit in Figure 10. Analog Multiplexer shows that MUX_IN will not be connected electrically when MUX[2:0] = 000b so there is no risk in floating the MUX_IN pin.

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TPS65217: Unused MUX_OUT