MAX3485ED

The MAX3485 is a low-power half-duplex transceiver that meets the specifications of RS-485 and RS-422. IC contains one driver and one receiver. The driver slew rates is not limited, allowing them to transmit up to 10Mbps. These transceivers draw between 120μA and 500μA of supply current when unloaded or fully loaded with disabled drivers. All parts operate from a single 3.3V supply. Drivers are short-circuit current limited and are protected against excessive power dissipation by thermal shutdown circuitry that places the driver outputs into a high-impedance state. The receiver input has a fail-safe feature that guarantees a logic-high output if the input is open circuit. The ESD tolerance is more than ±8kV for both Human Body Model and ±15kV for IEC61000-4-2 Air Discharge Method on this device.

Applications

• Low Power RS-485 Systems
• Telecommunications
• Packet Switching
• Industrial-Control Local Area Networks
• Data Concentration
• Data Multiplexers
• Integrated Services Digital Network (ISDN)

Key features

• Operates from a Single 3.3V Supply
• Interoperable with +5.0V Logic
• −7V to 12V Common-Mode Input Voltage Range
• Three-State Outputs
• Driver/ Receiver Enable
• Half-Duplex Communication
• Allows up to 32 Transceivers on the Bus
• Data Rate up to 10 Mbps
• Current-Limiting and Thermal Shutdown for Driver Overload Protection
• ESD Specifications ±15kV IEC61000-4-2 Air Discharge ±8kV Human Body Model