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Question about RS485 input threshold voltage

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fengluan

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according to rs485 spec. the receiver differential input threshold voltage is
(-200mv,200mv).and the input hysteresis is 70mv .
how to understand this and achieve it ,thanks a lot for advice.
 

question for rs485

Using the RS485 Transcievers in the market is the best and cheapest way.
 

Re: question for rs485

Threshold means that the receiver can detect a valid state when the received differential signal has amplitude of 200 mV or more ..
The receiver input hysteresis (shown in figure below) is the difference between the thresholds for low-to-high and high-to-low transitions ..

Regards,
IanP
 

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