MAX3441EASA+T

Overview

The MAX3441EASA+T is a half-duplex RS-485 transceiver manufactured by Analog Devices Inc./Maxim Integrated. It operates from a single +4.75V to +5.25V supply and supports data rates up to 10Mbps. The device integrates one differential driver and one differential receiver within an 8-pin SO package. Key electrical specifications include ±15kV ESD protection on the A and B pins, ±60V fault protection for signal lines, and a true fail-safe receiver input that guarantees a logic-high output when inputs are open or shorted. The unit load impedance allows up to 128 transceivers on a single bus.

Feature Summary

• Integrated ±60V fault protection safeguards communication bus lines against signal faults without requiring external components.
• Hot-swap circuitry prevents false transitions on the data bus during circuit initialization or connection to live backplanes.
• True fail-safe receiver inputs ensure a logic-high output state when receiver inputs are open, shorted, or connected to idle data lines.

Applications

• RS-422/RS-485 Communications
• Industrial Networks
• Telecommunications Systems
• HVAC Controls

Procurement Notes

Verify the specific suffix 'EESA+T' corresponds to the required automotive temperature range (-40°C to +125°C), SOIC-8 package, and tape-and-reel packaging format. Confirm RoHS compliance status and lead-free designation as indicated by the '+' symbol in the ordering information before finalizing procurement orders.

Selection Notes

Select this component when high-speed data transmission up to 10Mbps is required alongside robust fault protection capabilities. Unlike slew-rate limited variants, this model does not restrict transition speeds, making it suitable for applications demanding faster data throughput while maintaining compatibility with standard RS-485 network topologies and pinouts.

Part Context

This part belongs to the MAX3440E–MAX3444E family of fault-protected transceivers. While sharing core features like ±60V protection and fail-safe inputs, the MAX3441E variant is distinguished by its support for higher data rates up to 10Mbps compared to the 250kbps limit of other family members. It utilizes a combined DE/RE control pin for driver and receiver enablement.

Replacement Considerations

Publicly confirmed substitute part numbers within the same family include MAX3440EESA+, MAX3442EESA+, MAX3443EESA+, and MAX3444EESA+. These alternatives share identical pinouts and fault protection but differ in maximum data rate specifications or control pin configurations.

FAQ

What is the maximum data rate supported by the MAX3441E?

The MAX3441E supports guaranteed data rates up to 10Mbps.

How does the device handle open or shorted receiver inputs?

It features true fail-safe inputs that guarantee a logic-high receiver output when the inputs are open, shorted, or connected to an idle data line.

Is the MAX3441E hot-swappable?

Yes, the device includes hot-swap circuitry on the DE/RE pin to eliminate false transitions during board insertion into live backplanes.