RS-485/RS-422 half-duplex transceiver for 5V industrial buses
The ADM483EAR-1REEL from Analog Devices is a half-duplex RS-485/RS-422 transceiver with a single driver and single receiver, designed for differential data buses operating at 250 kbps. It runs on a 4.5 V to 5.5 V supply and comes in an 8-pin SOIC package for surface-mount assembly. The 70 mV receiver hysteresis improves noise immunity on long cable runs typical in factory automation, building management, and instrumentation networks.
250 kbps data rate — matched to fieldbus timing
At 250 kbps this transceiver is sized for Modbus RTU, BACnet MS/TP, and similar half-duplex fieldbuses that top out at that rate. The 70 mV hysteresis on the receiver input filters out noise picked up over twisted-pair runs, reducing false start-bit detection in electrically noisy environments like motor drives and PLC cabinets.
Active lifecycle — no obsolescence risk for new builds
No last-time-buy or end-of-life notice applies. For dual-sourcing resilience, the ADM483ARZ (tube-packaged sibling) is a direct functional equivalent with the same half-duplex RS-485/RS-422 interface, 250 kbps data rate, and 70 mV hysteresis — the only difference is the shipping medium.