MAX481ESA+T

Overview

The MAX481ESA+T is a half-duplex RS-485/RS-422 transceiver in an 8-pin SO package. It supports data rates up to 2.5Mbps with a supply voltage range of 4.75V to 5.25V. The device features ±15kV ESD protection on driver outputs and receiver inputs, ensuring robustness in harsh environments. It includes a low-power shutdown mode consuming only 0.5µA when RE is high and DE is low. Electrical characteristics include a typical no-load supply current of 500µA, short-circuit current limits, and thermal shutdown protection.

Feature Summary

• Provides ±15kV electrostatic discharge (ESD) protection on all I/O pins without latchup.
• Features a low-current shutdown mode for significant power savings in idle states.
• Includes thermal shutdown circuitry to protect against excessive power dissipation.
• Offers fail-safe receiver input that guarantees a logic-high output if the input is open.

Applications

• Low-power RS-485 communications
• Low-power RS-422 communications
• Industrial-control local area networks
• Transceivers for EMI-sensitive applications

Procurement Notes

Verify the component authenticity by checking the manufacturer marking against the official datasheet pinout and electrical specifications. Ensure the ordering suffix matches the required temperature range and packaging format. Confirm RoHS compliance status through the manufacturer's environmental documentation before integration into production.

Selection Notes

Select this component for half-duplex applications requiring data rates up to 2.5Mbps. It is suitable for systems needing ±15kV ESD protection and low standby power consumption via the shutdown feature. Compare against slew-rate-limited variants like the MAX483E if EMI reduction is prioritized over maximum speed.

Part Context

This part belongs to the MAX481E/MAX483E/MAX485E/MAX487E–MAX491E family of low-power transceivers. These devices are designed for RS-485 and RS-422 communications in harsh environments. The 'E' suffix denotes enhanced ESD protection compared to standard versions.

Replacement Considerations

The MAX485EESA+T is a functionally similar half-duplex transceiver within the same family. Verify compatibility regarding data rate requirements and package dimensions before substitution.