MAX481ESA-T

Overview

The MAX481ESA-T is a low-power, half-duplex RS-485 and RS-422 transceiver manufactured by Analog Devices Inc./Maxim Integrated. It integrates one driver and one receiver in an 8-pin SO package. The device supports data rates up to 2.5Mbps with a supply voltage range of 4.75V to 5.25V. It features ±15kV ESD protection on all pins without latchup. The part includes a low-current shutdown mode consuming only 0.5µA when both RE is high and DE is low. Driver outputs are short-circuit current limited and protected by thermal shutdown circuitry.

Feature Summary

• Provides ±15kV electrostatic discharge (ESD) protection on driver outputs and receiver inputs without latchup.
• Features a low-power shutdown mode that reduces supply current to typically 0.5µA.
• Includes driver short-circuit current limiting and thermal shutdown protection for excessive power dissipation.
• Receiver input incorporates a fail-safe feature that guarantees a logic-high output if the input is open circuit.

Applications

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

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm package type and temperature range. Ensure compatibility with system requirements for RS-485/RS-422 communication standards. Confirm availability through authorized distributors as stock levels may vary.

Selection Notes

Select this component for applications requiring half-duplex communication at speeds up to 2.5Mbps. It is suitable for harsh environments due to its robust ESD protection. Consider the low-power shutdown capability for battery-operated systems. Verify that the 8-pin SO package fits the design constraints.

Part Context

This device belongs to the MAX481E/MAX483E/MAX485E/MAX487E–MAX491E/MAX1487E family of low-power transceivers designed for RS-485 and RS-422 communications. The 'E' suffix denotes enhanced ESD protection compared to standard versions. The MAX481E specifically offers unrestricted slew rates for higher data rate transmission.

Replacement Considerations

The MAX485E is a functionally similar half-duplex transceiver within the same family. For full-duplex requirements, consider the MAX488E or MAX490E. Non-'E' versions like the MAX481 offer lower cost but reduced ESD protection.