The ST3485EBDR from STMicroelectronics is a 3.3V-powered RS-485/RS-422 transceiver rated for 15 Mbps, with ESD protection built into the bus pins, in the standard 8-SOIC package. It provides a 1/1 driver/receiver in half-duplex operation, runs from a 3V to 3.6V supply, and is specified over -40°C to +85°C. The headline number is the 15 Mbps data rate — substantially faster than the 2.5 Mbps of classic parts such as the MAX485 — which lets a 3.3V design push a high-speed differential link without moving to a 5V rail. The 70 mV receiver hysteresis is on the robust side, giving stable reception on idle or lightly loaded lines, and the integrated ESD protection means the pins facing field cabling can absorb connector-level discharge without always requiring external clamp components.
The ST3485EBDR suits 3.3V industrial and building-automation segments that need throughput: PLC backplanes, motor-drive communication, access-control and elevator links, sensor concentrators, and POS hardware. Being 3.3V-only, it pairs cleanly with 3.3V microcontrollers and logic, and at 15 Mbps you should keep the cable short and properly terminated — RS-485's speed-versus-reach trade-off applies directly. The E suffix denotes the ESD-enhanced version and DR the tape-and-reel 8-SOIC delivery. When sourcing, confirm your required ambient stays within -40°C to +85°C; for hotter environments a 125°C-rated alternative may be needed. For a fast, ESD-hardened, 3.3V half-duplex RS-485 interface from a leading European vendor, the ST3485EBDR is a dependable, well-supported choice.