MAX3040CUE+

Overview

The MAX3040CUE+ is a quad RS-485/RS-422 transmitter manufactured by Analog Devices Inc./Maxim Integrated. It operates on a single +5V supply with a typical operating current of 1mA and enters a low-power shutdown mode consuming 2nA. The device supports data rates up to 250kbps and features ±10kV ESD protection (Human Body Model) and ±4kV Electrical Fast Transient immunity per IEC 1000-4-4. It includes hot-swap capability to prevent false transitions during power-up or insertion. The component is housed in a 16-pin TSSOP package and functions within an industrial temperature range of -40°C to +85°C.

Feature Summary

• Hot-swap capability prevents erroneous data transfer during board insertion or power-up sequences.
• Slew-rate limited outputs minimize electromagnetic interference and reduce signal reflections on improperly terminated cables.
• Integrated high-voltage protection structures safeguard against electrostatic discharge and fast transient bursts.

Applications

• Telecommunications equipment
• Industrial motor control systems
• Industrial programmable logic controllers (PLCs)
• Networking infrastructure

Procurement Notes

Verify the specific suffix 'CUE+' corresponds to the required commercial temperature range and TSSOP packaging configuration. Confirm RoHS compliance status through official manufacturer documentation prior to integration. Ensure the ordering information matches the exact pinout and enable logic requirements for the target design.

Selection Notes

Select this component when designing systems requiring robust noise immunity and protection against electrical transients on balanced twisted-pair lines. The slew-rate limiting feature makes it suitable for applications where minimizing EMI is critical. Verify that the 250kbps data rate meets the system's throughput requirements compared to higher-speed variants in the family.

Part Context

This part belongs to the MAX3040–MAX3045 family of 5V quad RS-485/RS-422 transmitters. These devices serve as low-power, ESD-protected upgrades to industry-standard parts like the SN75174 and DS26LS31C. They are designed to operate optimally with compatible quad differential line receivers from the same product family.

Replacement Considerations

Pin-compatible replacements include the SN75174, LTC487, and other members of the MAX304x family such as the MAX3041 or MAX3042B, provided their respective data rate specifications align with the application needs.