MAX3072EASA+T

Overview

The MAX3072EASA+T is a half-duplex RS-485 transceiver manufactured by Analog Devices Inc./Maxim Integrated. It features one driver and one receiver operating on a single 3.3V supply (3V to 3.6V). The device supports data rates up to 250kbps with reduced slew-rate drivers to minimize EMI. It includes ±15kV ESD protection, fail-safe circuitry ensuring a logic-high output when inputs are open or shorted, and hot-swap capability for safe bus insertion. Operating temperature ranges from -40°C to +125°C in the 8-SOIC package.

Feature Summary

• Half-duplex communication architecture optimized for RS-485 networks
• Integrated fail-safe mechanism guarantees a high receiver output during idle or fault conditions
• Hot-swap input structure prevents false transitions during board insertion into powered backplanes
• Reduced slew-rate driver design minimizes electromagnetic interference and signal reflections

Applications

• Industrial control systems
• Telecommunications equipment
• Security systems
• Lighting systems
• Instrumentation

Procurement Notes

Verify the specific suffix 'A' indicates the extended industrial temperature range (-40°C to +125°C) compared to the commercial grade variant. Confirm the '+T' designation corresponds to tape-and-reel packaging rather than tube packaging. Ensure the component source matches the official manufacturer specifications for the MAX3072 family to guarantee functional compatibility.

Selection Notes

Select this model specifically for half-duplex applications requiring error-free transmission at speeds up to 250kbps. The reduced slew rate makes it suitable for long cable runs where signal integrity is critical. Verify that the system requires the extended temperature range indicated by the 'A' suffix. This part is not suitable for full-duplex topologies or higher-speed requirements exceeding 250kbps.

Part Context

This component belongs to the MAX3070E–MAX3079E family of +3.3V RS-485 transceivers. Within this series, the MAX3072E is designated as a half-duplex device with limited slew rates. It shares common protection features like ESD tolerance and thermal shutdown with siblings such as the MAX3070E and MAX3074E, but differs in duplex mode and maximum data rate capabilities.

Replacement Considerations

Public confirmed substitute part numbers: MAX3072EEPA+, MAX3072EESA+