About RS232C driver (ADM3202), if there are unused pin (especially CMOS input like as T2IN), should I take care to Pull up or pull down for this unused pin?
I would appreciate if you give me any advice.
For the ADM3202 Receiver pins, please see page 9 of the data sheet.
Unconnected Receiver input pins result in logic 1 Receiver output levels.
If the T2IN pin is left floating (unconnected) then the T2OUT pin could either be high or low.
If you are not using T2IN / T2OUT, and If you need to set the T2OUT to a defined state, then yes I would use a pull-up or pull-down resistor on the T2IN.
Thank you very much for your response!
I understood that.
Good luck with your project!
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