MAX33073EASA+T

Overview

The MAX33073EASA+T is a half-duplex RS-485/RS-422 transceiver manufactured by Analog Devices Inc./Maxim Integrated. It supports data rates up to 2Mbps and operates within a supply voltage range of 3V to 5.5V, accommodating both +3.3V and +5.0V systems. The device features ±65V fault protection on driver outputs and receiver inputs, along with a ±40V common-mode range. It incorporates ±40kV ESD protection (HBM) and includes a polarity selection input for software correction of cross-wired cables. Packaged in an 8-pin SOIC, it functions over a temperature range of -40°C to +125°C.

Feature Summary

• Integrated ±65V fault protection on A/B lines ensures robust operation in harsh industrial environments without external components.
• Polarity inversion capability via the POL pin allows software-based correction of miswired field cables.
• True fail-safe design guarantees a logic-high receiver output when inputs are open or shorted.
• Hot-swap protection circuitry prevents unwanted driver activation during board insertion into powered backplanes.

Applications

• Industrial automation equipment
• Home and building automation systems
• Agriculture and heavy machinery control
• Power supply and UPS monitoring
• Elevator control networks

Procurement Notes

Verify the specific ordering suffix against official documentation to confirm package type and tape-and-reel configuration. Ensure compatibility with RoHS standards if required by the target assembly process. Cross-reference the manufacturer's part number with authorized distributor catalogs to validate authenticity and traceability before procurement.

Selection Notes

Select this component for applications requiring high-speed communication up to 2Mbps alongside extreme bus fault tolerance. The wide common-mode range makes it suitable for systems with significant ground potential differences. Verify that the 1/8 unit load receiver impedance aligns with the total node count requirements of the intended RS-485 network topology.

Part Context

This part belongs to the MAX33072E/MAX33073E family of fault-protected transceivers. While the MAX33072E variant is limited to 500kbps, the MAX33073E provides enhanced bandwidth for higher throughput needs. Both share identical protection specifications and packaging options, differing primarily in switching speed capabilities.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material. Designers should consult the manufacturer directly for qualified alternatives or verify pin-to-pin compatibility with other high-protection RS-485 transceivers from different vendors.