MAX491 Tranceiver

The MAX491 is a low-power transceiver designed for RS-485 and RS-422 communication protocols. It operates from a single 5V supply and is optimized for half-duplex communication, allowing for robust data transmission over long distances. The MAX491 is suitable for applications requiring reliable and efficient data communication in industrial automation, building management systems, and telecommunications equipment. It features short-circuit current limiting and thermal shutdown protection to enhance system reliability.

Key Features:

• Low power consumption: 300 µA (max) supply current
• Meets RS-485 and RS-422 standards
• Half-duplex communication mode
• Data rates up to 2.5 Mbps
• Single 5V supply operation
• Short-circuit current limiting
• Thermal shutdown protection
• Supports up to 32 transceivers on the bus
• High input impedance
• Available in 8-pin DIP and SOIC packages

Technical Specifications:

• Supply Voltage (VCC): 4.75V to 5.25V
• Driver Differential Output Voltage: ±1.5V (min)
• Receiver Input Sensitivity: ±200mV
• Receiver Input Resistance: 12kΩ (min)
• High-Level Input Voltage (VIH): 2V (min)
• Low-Level Input Voltage (VIL): 0.8V (max)
• High-Level Output Voltage (VOH): 3.5V (min) at Iout = -4mA
• Low-Level Output Voltage (VOL): 0.4V (max) at Iout = 4mA
• Data Rate: Up to 2.5 Mbps
• Operating Temperature Range: -40°C to +85°C
• Package: 8-pin DIP/SOIC

Applications:

• Industrial Automation: Reliable communication in factory automation and process control systems.
• Building Management Systems: HVAC control, lighting control, and security systems.
• Telecommunications: Data transmission in telecom systems and equipment.
• Embedded Systems: Microcontroller-based projects requiring robust data transfer.
• Networking Equipment: Long-distance data communication in networking hardware.
• Security Systems: Surveillance and access control systems.

Datasheet:
For detailed technical information, refer to the MAX491 Datasheet.