MAX3443EASA+T

Overview

The MAX3443EASA+T is a half-duplex RS-485 transceiver in an 8-pin SO package. It operates from a 5V supply (4.75V to 5.25V) at data rates up to 10Mbps with a typical operating current of 10mA. The device features ±60V fault protection on the A and B pins, ±15kV ESD protection, and true fail-safe receiver inputs that guarantee a logic-high output when inputs are open or shorted. It supports hot-swap operations for telecom applications and allows up to 128 transceivers on a single bus. The component is specified over an automotive temperature range of -40°C to +125°C.

Feature Summary

• Integrated ±60V fault protection on signal lines eliminates the need for external protection components.
• Hot-swap circuitry prevents false transitions during board insertion into live backplanes.
• True fail-safe receiver inputs ensure a logic-high state when differential signals are absent or shorted.

Applications

• RS-422/RS-485 communications
• Industrial networks
• Telecommunications systems
• HVAC controls

Procurement Notes

Verify the specific suffix 'EASA' corresponds to the automotive temperature grade (-40°C to +125°C) and the SOIC-8 package type. Confirm RoHS compliance status via official documentation before integration. Ensure the ordering code matches the exact pinout and electrical specifications required for the target design.

Selection Notes

Select this component when high-speed data transmission up to 10Mbps is required alongside robust fault tolerance. The integrated thermal shutdown and short-circuit current limiting provide driver protection against excessive power dissipation. Verify that the system voltage remains within the 4.75V to 5.25V range for optimal performance.

Part Context

This part belongs to the MAX3440E–MAX3444E family of fault-protected transceivers manufactured by Analog Devices / Maxim Integrated. While sharing similar core architectures, variants differ in data rate capabilities and control configurations. The MAX3443E specifically offers guaranteed 10Mbps speeds with separate Driver Enable and Receiver Enable pins.

Replacement Considerations

Public confirmed substitutes include MAX3440EASA+T, MAX3441EASA+T, and MAX3442EASA+T. These parts share identical pinouts and packaging but may differ in maximum data rates or slew-rate limiting characteristics.