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
APPLICATIONS
• Low Power RS-485 Systems
• Telecommunications
• Packet Switching
• Industrial-Control Local Area Networks
• Data Concentration
• Data Multiplexers
• Integrated Services Digital Network (ISDN)
DESCRIPTION
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. The transceiver draws 425µA of supply
current when unloaded or fully loaded with disabled
driver. All parts operate from a single 3.3V supply.
Driver is short-circuit current limited and is 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.