Other Parts Discussed in Thread: SN65HVD3083E, ISO7631FC
My customer is considering SN65HVD3082E and ISO7631F and has a question.
I would be grateful if you could advise.
The R pin of the SN65HVD3083E is connected to the ISO7631FCDWR isolator_IN pin.
According to the ISO7631FCDWR data sheet, a constant current source, that is, a high resistance, is connected between the INC pin and GND.
The SN65HVD3083E data sheet P.18 Figure 25 shows an external pull-up (10 kohm) between the R pin and Vcc(+5V).
In this case, the voltage is divided with the high resistance inside the isolator, and the isolator input voltage drops.
So is it possible to make the external pull-up of the RS485 transceiver_R pin to a pull-down resistor?
I appreciate your great help in advance.