MAX33073EASA+

Overview

The MAX33073EASA+ is a half-duplex RS-485/RS-422 transceiver manufactured by Analog Devices Inc. under the Maxim Integrated brand, housed in an 8-pin SOIC package. It supports data rates up to 2Mbps and operates on a supply voltage range of 3V to 5.5V with a typical supply current of 6mA. The device features ±65V fault protection and ±40V common-mode range on driver outputs and receiver inputs. ESD protection reaches ±40kV (HBM), ±15kV air gap, and ±10kV contact discharge. It includes thermal shutdown at +160°C, true fail-safe logic, hot-swap protection, and a polarity inversion input.

Feature Summary

• Integrated ±65V overvoltage fault protection on A/B lines for harsh industrial environments
• Software-controlled polarity selection input to correct cross-wired field cables
• True fail-safe receiver guarantees a known high output state when inputs are open or shorted
• Hot-swap protection prevents unwanted driver activation during board insertion

Applications

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

Procurement Notes

Verify the component against official Analog Devices documentation to confirm lead-free status and RoHS compliance. Ensure the specific ordering suffix matches the required tape-and-reel or tube packaging format. Cross-reference the manufacturer part number with authorized distributor catalogs to validate authenticity and traceability before procurement.

Selection Notes

Select this model when high bandwidth up to 2Mbps is required alongside robust bus protection. It is suitable for applications experiencing significant ground potential differences due to its ±40V common-mode range. Use this variant instead of the MAX33072E when higher data throughput is necessary while maintaining identical pinouts and protection specifications.

Part Context

This component belongs to the MAX33072E/MAX33073E family of fault-protected transceivers. It shares the same physical footprint and functional architecture as the MAX33072E, differing primarily in maximum data rate capabilities. Both variants address the limitations of standard RS-485 devices regarding extreme voltage faults and common-mode noise in electrically noisy industrial settings.

Replacement Considerations

The MAX33072EASA+ serves as a lower-speed alternative within the same package. Verify compatibility if replacing other RS-485 transceivers, ensuring that the replacement supports the required ±65V fault tolerance and polarity inversion feature.