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TRS3232: How to handle unused pins

Part Number: TRS3232

Dear all,

I would like to ask how to handle unused pins.

Of the two input / output channels of TRS3232, one circuit is unused.

Please tell me how to handle unused pins DIN, Dout, Rin, Rout.

I checked the data sheet, but there was no content.

Our customers say that they want a quick response, so I'd be happy if you could get a quick response.

Best Regards,

Y.Ottey