MAX3293AUT-T

Overview

The MAX3293AUT-T is a low-power, high-speed transmitter for RS-485/RS-422 communication operating from a single +3.3V supply. It contains one differential transmitter with a maximum data rate of 250kbps and slew-rate limiting to minimize EMI. The device draws 5mA in normal operation and 1µA in shutdown mode (DE = GND). It features hot-swap circuitry, short-circuit current limiting, and thermal shutdown. The output level is guaranteed at +1.5V with a standard 54Ω load. It operates over the automotive temperature range (-40°C to +125°C) and is housed in a 6-pin SOT23 package.

Feature Summary

• Slew-rate limited outputs to minimize electromagnetic interference and reduce reflections on improperly terminated cables
• Integrated hot-swap input structure prevents false transitions during board insertion or connection to live backplanes
• Driver protection includes short-circuit current limiting and thermal-shutdown circuitry to prevent excessive power dissipation

Applications

• RS-485/RS-422 Communications
• Automotive Systems
• Telecom Equipment
• Industrial Control

Procurement Notes

Verify the specific suffix 'T' indicates tape and reel packaging when placing orders. Confirm that the component meets AEC-Q100 qualification requirements if used in automotive applications. Ensure the ordering part number matches the exact slew-rate specification needed for the target application.

Selection Notes

Select this component for applications requiring low-power RS-485/RS-422 transmission in space-constrained designs. The MAX3293 variant is suitable where reduced EMI is critical due to its slew-rate limitation. Verify compatibility with single +3.3V power supplies and ensure the 6-pin SOT23 package fits the available PCB footprint.

Part Context

This component belongs to the MAX3293/MAX3294/MAX3295 family of low-power transmitters. While all share the same package and basic functionality, they differ in data rates and slew-rate characteristics. The MAX3293 specifically offers the lowest data rate among the series but provides enhanced EMI reduction through controlled slew rates.

Replacement Considerations

Direct replacements within the same family include MAX3294AUT-T and MAX3295AUT-T. Note that these alternatives offer higher data rates (2.5Mbps and 20Mbps respectively) and lack the slew-rate limiting feature found in the MAX3293.