TMUX1111: Connect to SELx pin from GPIO

Masatsune Isihara

Part Number: TMUX1111
Other Parts Discussed in Thread: IWR1843

Hi Experts,

Can We connect the SELx pins of this TMUX1111 switch chip to the GPIO pins of IWR1843?
(For example, R5, P6, R7, P7, R8, P8)

We want to control the SELx pins of TMUX1111 from IWR1843.

TMUX1111 VDD voltage is 3.3V.

Also, when VDD = 3.3V and VSEL = 3.3V (by GPIO), does the S/D pins of TMUX1111 pass a 3.3V analog signal?

Thank you.
Best regards,

Ishihara

over 3 years ago

0 Clemens Ladisch over 3 years ago

Guru 316440 points

Yes, this switch handles 3.3 V control signals and 3.3 V data signals; see sections 9.3.2 and 9.3.3 of the datasheet.

+1 Nir Gilgur over 3 years ago

TI__Genius 17665 points

Hello Ishihara,

Yes, you can connect the select pins of the TMUX1111 to the GPIO pins of IWR1843.

Regarding your second question, the device is capable of passing 3.3V. When both VDD and VSEL are 3.3V meaning the select pin is high. It will allow voltage to pass from source to drain. If you are inputting 3.3V through the S pin and the corresponding select pin is high, then 3.3V will pass from S to D.

Please let me know if you have any more questions or concerns!

Thanks,

Nir

0 Masatsune Isihara over 3 years ago in reply to Clemens Ladisch

Prodigy 60 points

Hello Clemens,

Thank you for kind comments on this.
I will check the datasheet.

Regards,
Ishihara

0 Masatsune Isihara over 3 years ago in reply to Nir Gilgur

Prodigy 60 points

Hello Nir,

Thank you for kind comments on this.

I understand your answer.

Thank you for your support.

Regards,
Ishihara

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TMUX1111: Connect to SELx pin from GPIO