The maximum cable length supported by the SN65HVD251P is dependent on the baud rate and the type of cable used. As a general guideline, the maximum cable length is around 100 meters at 9600 bps and 10 meters at 1 Mbps.
To ensure signal integrity and minimize EMI, use twisted-pair cables, keep the transmitter and receiver pairs close together, use a common-mode choke or ferrite bead on the cable, and ensure proper grounding and shielding of the circuit.
For optimal performance, keep the transmitter and receiver circuits close together, use a solid ground plane, and route the differential pairs as close together as possible. Avoid crossing signal lines over each other and keep the layout symmetrical.
Use a common-mode choke or isolation transformer to handle common-mode voltage and ground potential differences. Ensure that the transmitter and receiver grounds are connected through a low-impedance path to prevent ground loops.
The SN65HVD251P has a maximum junction temperature of 150°C. Ensure good airflow, use a heat sink if necessary, and avoid overheating the device. Monitor the device temperature and adjust the thermal design accordingly.
SN65HVD251P datasheet
by Texas Instruments
