TS5A23157-Q1: Usage of IN pin

junsong gu

Prodigy 170 points

Part Number: TS5A23157-Q1

Hi TI,

can i connect IN1 and IN2 directly and use only one GPIO to switch channnel for I2C case?

over 3 years ago

0 Clemens Ladisch over 3 years ago

Guru 316690 points

Yes. High-impedance CMOS inputs are a very low load.

0 junsong gu over 3 years ago in reply to Clemens Ladisch

Prodigy 170 points

ok, got it, thank you

0 junsong gu over 3 years ago in reply to Clemens Ladisch

Prodigy 170 points

BTW if we don't use NC channel , can we float NC1&NC2?

0 Clemens Ladisch over 3 years ago in reply to junsong gu

Guru 316690 points

Yes; see [FAQ] More Frequently Asked Questions about signal switches and multiplexers.

0 Bryan Marshall over 3 years ago in reply to Clemens Ladisch

TI__Genius 10974 points

Hi Junsong,

Believe this thread is similar to the one here: https://e2e.ti.com/support/switches-multiplexers-group/switches-multiplexers---internal/f/switches-multiplexers---internal-forum/1097586/ts5a23157-q1-in1-in2-connection

Regardless, IN1 and IN2 can certainly be tied together, this will just allow both switches to change at the same moment. Also, you can also float the NC1/2 pins if you like and will not impact the functionality of your switch as long as this is a low frequency application (otherwise it is advised to tie them to a 50 ohm resistor to GND).

Thanks!
Bryan

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TS5A23157-Q1: Usage of IN pin