DS485M

The Texas Instruments DS485M is a low-power transceiver IC that supports both RS-485 and RS-422 multipoint communication standards. It integrates one driver and one receiver, capable of operating at data rates up to 2.5 Mbps. The device is designed for a single +5V supply, with an operating voltage range of 4.75V to 5.25V.

Key features include a low quiescent current of 200 μA typical, TRI-STATE outputs on both the driver and receiver, and a wide common-mode input voltage range of -7V to +12V. The driver is protected against short-circuit conditions and excessive power dissipation through thermal shutdown circuitry. The receiver includes a failsafe feature that ensures a logic-high output when the input is open circuit.

This transceiver is available in an 8-SOIC package and is suitable for industrial temperature range operation from -40°C to 85°C. Its half-duplex flow-through pinout and compatibility with MAX485 and LTC485 make it a versatile choice for various communication applications. The device allows up to 32 transceivers on the bus.

The DS485M is surface-mountable, making it suitable for automated assembly processes. Its robust design with features like current-limiting and thermal shutdown protection enhances reliability in demanding environments.