MAX491EESD

Drivers, Receivers, Transceivers Overview

The MAX491EESD+ is a full-duplex RS-422 and RS-485 transceiver manufactured by Analog Devices Inc./Maxim Integrated. It integrates one driver and one receiver in a 14-pin SOIC package (0.154 inch width). The device operates on a single 5V supply with a voltage range of 4.75V to 5.25V. It supports data transmission rates up to 2.5Mbps. The receiver features 70mV hysteresis for noise immunity. Operating temperature ranges from -40°C to +85°C. The component is RoHS compliant and lead-free.

Drivers, Receivers, Transceivers Feature Summary

• Full-duplex communication capability supporting simultaneous transmission and reception
• Integrated ESD protection rated at ±15kV for enhanced signal integrity
• Receiver fail-safe design ensures high logic output during open-input conditions
• Driver thermal shutdown and short-circuit current limiting for fault protection

Drivers, Receivers, Transceivers Applications

• Industrial control local area networks
• Building automation systems
• Energy management systems requiring long-distance data communication

Drivers, Receivers, Transceivers Procurement Notes

Verify the specific suffix against official datasheets, as ordering codes may indicate variations in packaging or temperature ratings. Confirm RoHS compliance status directly with the manufacturer or authorized distributor documentation. Ensure the selected variant matches the required package type and operational temperature range for the target application environment.

Drivers, Receivers, Transceivers Selection Notes

Select this component for applications requiring full-duplex RS-422 or RS-485 communication over standard twisted-pair cabling. It is suitable for environments where moderate data speeds up to 2.5Mbps are sufficient. Consider the 14-SOIC package constraints for PCB layout. Verify that the system power supply remains within the 4.75V to 5.25V operating window to ensure reliable performance.

Drivers, Receivers, Transceivers Part Context

The MAX491EESD+ belongs to the MAX481E through MAX491E series of low-power transceivers designed for RS-485 and RS-422 interfaces. Unlike half-duplex variants in the same family, this model provides independent transmit and receive channels. It shares common interface standards with other Maxim Integrated industrial communication components but is distinct due to its full-duplex architecture and slew-rate-unlimited driver.

Drivers, Receivers, Transceivers Replacement Considerations

The MAX3491EESD+ serves as a functional alternative offering higher data rates up to 12Mbps and operation at 3.3V. Designers must account for differences in supply voltage requirements and pinout compatibility when substituting these devices.