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DS16F95QML-SP: floating data input / receiver output

Part Number: DS16F95QML-SP
Other Parts Discussed in Thread: DS16F95QML

Hi TI Team,

For our space project, we are planning on using two DS16F95QML transceivers to realize full-duplex RS485 over 2 A/B pairs:
- one in a "receiver only" mode (DE/RE_N tied to ground)
- the other one in a "transmitter only" setup (DE/RE_N tied to our FPGA tx_en line)

The reason being that there are no space grade single channel RS485 transmitter or receiver, only 4 channels ones.

Should the driver input (DI) of the "receiver" be pulled down?
Similarly, should the receiver output (RO) of the "transmitter" be pulled down?

Best,
Charles