MAX485 RS-485/RS-422 Transceiver IC (SMD Package)

The MAX485 is a low-power transceiver that supports RS-485 and RS422 communication. The integrated circuit has one driver and one receiver. The MAX485 driver slew rates is not limited, allowing it to transmit up to 2.5Mbps. When empty or fully loaded with deactivated drivers, these transceivers demand between 120A and 500A of supply current. All components are powered by a single 5V supply. Drivers are short-circuited current restricted and protected from excessive power dissipation by thermal shutdown circuitry that puts the driver outputs in a high-impedance condition. If the receiver input is an open circuit, a fail-safe mechanism ensures a logic-high output. The MAX485 is intended for use in half-duplex Applications.

Datasheet

FEATURES

• Low Quiescent Current: 300A
• -7V to +12V Common-Mode Input Voltage Range
• Three-State Outputs
• 30ns Propagation Delays, 5ns Skew
• Operate from a Single 5V Supply
• Allows up to 32 Transceivers on the Bus
• Data rate: 2.5 Mbps
• Current-Limiting and Thermal Shutdown for Driver Overload Protection
• The transmitter outputs and receiver inputs are protected to 15kV Air ESD

Applications

• Low-Power RS-485 Transceivers
• Low-Power RS-422 Transceivers
• Level Translators Transceivers for EMI-Sensitive Applications
• Industrial-Control Local Area Networks

Specification