MAX3293AUT

Overview

The MAX3293AUT 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 features slew-rate limiting to minimize EMI. The device draws 5mA of supply current when unloaded and 1µA in shutdown mode (DE = GND). It operates over an automotive temperature range of -40°C to +125°C and is housed in a 6-pin SOT23 package.

Feature Summary

• Slew-rate limited output to minimize electromagnetic interference and reduce reflections caused by improperly terminated cables
• Hot-swap circuitry eliminates false transitions on the data cable during circuit initialization or connection to a live backplane
• Short-circuit current limiting and thermal-shutdown circuitry protect the driver against excessive power dissipation

Applications

• RS-485/RS-422 Communications
• Clock Distribution
• Telecom Equipment
• Automotive Systems
• Security Equipment

Procurement Notes

Verify the specific ordering suffix to confirm lead-free status and tape-and-reel packaging configuration. Ensure the component matches the required automotive temperature range specifications. Cross-reference the manufacturer part number with official distributor catalogs to validate authenticity and traceability before finalizing procurement orders.

Selection Notes

Select this component when designing systems requiring RS-485 or RS-422 transmission at speeds up to 250kbps with strict electromagnetic interference constraints. The integrated slew-rate limiting makes it suitable for applications with long or poorly terminated cables. Verify that the system operates within the specified single +3.3V supply voltage range and requires a compact 6-pin SOT23 footprint.

Part Context

This component belongs to the MAX3293/MAX3294/MAX3295 family of low-power transmitters designed for RS-485/RS-422 communication. While the MAX3295 supports higher speeds up to 20Mbps without slew-rate limiting, the MAX3293 variant specifically targets lower-speed applications where minimizing EMI through controlled signal transition rates is a primary design requirement.

Replacement Considerations

MAX3293AUT+T serves as the direct lead-free equivalent.