RS-485 transceiver for industrial bus lines
The SN65LBC184DR is a half-duplex RS-485 transceiver from Texas Instruments, packing one driver and one receiver into an 8-SOIC package. It handles data rates up to 250 kbps — fast enough for most Modbus, Profibus, and BACnet fieldbus segments, but not for high-speed motion-control links. The 70 mV of receiver hysteresis gives you a solid noise margin on long twisted-pair runs, which matters when the cable snakes past VFDs and contactors.
This part runs on a 4.75V to 5.25V supply — it is a 5V-only device, so do not try to power it from a 3.3V rail.
It is ROHS3 compliant, which means it meets the current EU RoHS exemption rules — no lead, no restricted phthalates.