The Maxim MAX3070EASD+ is a full-duplex RS422/RS485 transceiver in a 14-SOIC package, designed for balanced-data serial communication over twisted-pair cabling. It handles one driver and one receiver per device (1/1), operating from a 3V to 3.6V supply rail — typically a 3.3V bus. The 250kbps data rate suits industrial fieldbus links, PLC-to-sensor networks, and building-automation backbones where cable lengths run tens to hundreds of metres.
Supply rail and signal margin
Rated for 3V to 3.6V supply, this part mates directly with 3.3V logic families (FPGA banks, ARM MCU UARTs) without a level shifter. The 100 mV receiver hysteresis cleans up noise on long cable runs — a common failure point on RS485 links in electrically noisy plants. Full-duplex operation means you get simultaneous transmit and receive on a four-wire bus, halving the protocol overhead compared to half-duplex turnarounds.
The part is RoHS3 compliant.