MAX491ECSD+T

Drivers, Receivers, Transceivers Overview

The MAX491ECSD+T is a low-power, full-duplex RS-485 and RS-422 transceiver manufactured by Analog Devices Inc. (Maxim Integrated). It operates from a single +5V supply with a voltage range of 4.75V to 5.25V. The device features one driver and one receiver, supporting data rates up to 2.5Mbps. It provides ±15kV electrostatic discharge (ESD) protection on all pins without latchup. The unit draws as little as 120µA supply current when unloaded or fully loaded with disabled drivers. It includes short-circuit current limiting and thermal shutdown protection for the driver outputs.

Drivers, Receivers, Transceivers Feature Summary

• Full-duplex communication capability with independent driver and receiver enable controls
• Robust ±15kV ESD protection on all pins ensuring reliable operation in harsh environments
• Integrated thermal shutdown and short-circuit current limiting for driver output protection

Drivers, Receivers, Transceivers Applications

• Low-Power RS-485 Transceivers
• Low-Power RS-422 Transceivers
• Industrial-Control Local Area Networks

Drivers, Receivers, Transceivers Procurement Notes

Verify the specific ordering suffix 'CSD' corresponds to the required temperature range and package type against the official Maxim Integrated datasheet. Confirm RoHS compliance status and lead-free specifications directly with the manufacturer or authorized distributors before procurement.

Drivers, Receivers, Transceivers Selection Notes

Select this component for applications requiring full-duplex RS-485/RS-422 communication at speeds up to 2.5Mbps. Ensure the system operates within the specified +5V supply voltage range. Consider the SOIC-14 package constraints and verify that the ±15kV ESD protection meets the environmental requirements of the deployment site.

Drivers, Receivers, Transceivers Part Context

This part belongs to the MAX481E/MAX483E/MAX485E/MAX487E–MAX491E family of low-power transceivers. Unlike half-duplex variants in the same series, the MAX491E supports simultaneous transmission and reception. It shares pin compatibility with standard non-'E' versions but offers enhanced ESD protection suitable for industrial environments.

Drivers, Receivers, Transceivers Replacement Considerations

The MAX491ESD+T is a direct replacement variant offering the same electrical characteristics in a cut-tape reel packaging format instead of tube.