MAX3443EASA+

Overview

The MAX3443EASA+ 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 supply 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 devices.
• Hot-swap circuitry prevents false transitions during board insertion into live backplanes.
• True fail-safe receiver inputs ensure a logic-high output under open, shorted, or idle line conditions.

Applications

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

Procurement Notes

Verify the specific suffix 'A' confirms the extended automotive temperature range (-40°C to +125°C) compared to industrial variants. Confirm the '+T' designation indicates reel packaging if applicable to the specific order code. Ensure the component matches the lead-free/RoHS-compliant specification indicated by the '+' symbol in the ordering information.

Selection Notes

Select this model specifically for high-speed applications requiring up to 10Mbps data transmission. Unlike the MAX3440E/MAX3442E/MAX3444E which feature slew-rate limiting for lower speeds, the MAX3443E provides full-speed performance without rate limitation. Verify that the system requires the low-power shutdown capability provided by the separate DE and RE control pins found in this variant.

Part Context

This component belongs to the MAX3440E–MAX3444E family of fault-protected transceivers. While sharing the same core architecture and pinout, the MAX3443E is distinguished by its guaranteed 10Mbps data rate capability and dedicated Driver Enable (DE) and Receiver Enable (RE) pins, unlike the combined DE/RE pin used in other family members.

Replacement Considerations

The MAX3441E offers similar 10Mbps performance but utilizes a combined DE/RE control pin instead of separate enable pins. Other family members like the MAX3440E provide lower speed capabilities with slew-rate limiting.