MAX481EESA+T

Overview

The MAX481EESA+T is a low-power, half-duplex RS-485/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 and features one driver and one receiver. The device supports data rates up to 2.5Mbps with unrestricted slew rates. It provides ±15kV ESD protection on all pins without latchup. The no-load supply current ranges from 300µA to 500µA, while the shutdown mode consumes only 0.5µA. It includes thermal shutdown and short-circuit current limiting for driver protection.

Feature Summary

• Provides ±15kV electrostatic discharge protection on driver outputs and receiver inputs without latchup.
• Features a low-power shutdown mode that reduces supply current to 0.5µA when both driver and receiver are disabled.
• Includes thermal shutdown circuitry and short-circuit current limiting to protect against excessive power dissipation.

Applications

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

Procurement Notes

Verify the component authenticity by checking the manufacturer marking and date code against official documentation. Ensure the ordering suffix matches the required package type and temperature range specifications. Confirm RoHS compliance status through the supplier's certification documents before finalizing procurement orders.

Selection Notes

Select this component for applications requiring high-speed communication up to 2.5Mbps in harsh environments. It is suitable for systems needing robust ESD protection and low standby power consumption. Consider the half-duplex operation mode and SOIC-8 package constraints during PCB layout design.

Part Context

This part belongs to the MAX481E/MAX483E/MAX485E/MAX487E–MAX491E family of low-power transceivers designed for RS-485 and RS-422 communications. The 'E' suffix indicates enhanced ESD protection compared to standard versions. It is intended for use in industrial control networks and other applications requiring reliable bidirectional data transmission.

Replacement Considerations

The MAX485EESA+T is a functionally similar half-duplex transceiver within the same family but may have different electrical characteristics or pin configurations. Verify compatibility regarding data rate limits and package dimensions before substitution.

FAQ

What is the maximum data rate supported by the MAX481E?

The MAX481E supports data rates up to 2.5Mbps due to its unrestricted driver slew rate.

How does the MAX481E handle input open circuits?

The receiver input has a fail-safe feature that guarantees a logic-high output if the input is an open circuit.

What is the supply current in shutdown mode?

In shutdown mode, where both the driver and receiver are disabled, the supply current typically draws only 0.5µA.