WB485E

WB485 is a low-power transceiver for RS-485 and RS-422 communications, integrating one driver and one receiver. The device features an unslew-rate-limited driver capable of data rates up to 2.5 Mbps, designed for half-duplex applications. It operates from a single 5V supply with Driver Enable (DE) and Receiver Enable (RE) pins. The driver includes short-circuit current limiting and a thermal shutdown circuit that forces the outputs to a high-impedance state to prevent excessive power dissipation. The receiver inputs feature a failsafe function that guarantees a logic-high output when the inputs are open-circuited.

Applications

• Low-power RS-485 transceiver
• Low-power RS-422 transceiver
• Level translator
• Transceiver for EM-sensitive applications
• Industrial control LAN

Key features

• Tri-state outputs
• Half-duplex design
• Bus supports up to 256 transceivers
• SOP8 package