MAX3040EWE+

Overview

The MAX3040EWE+ is a quad RS-485/RS-422 transmitter manufactured by Analog Devices Inc./Maxim Integrated. It operates from a single +5V supply (4.75V to 5.25V) and supports data rates up to 250kbps with a typical propagation delay of 0.7µs. The device features ±10kV Human Body Model ESD protection 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. Operating current is typically 2mA, dropping to 10µA in shutdown mode. It is housed in a 16-pin Wide SO package and functions within an industrial temperature range of -40°C to +85°C.

Feature Summary

• Hot-swap capability eliminates false transitions on the data cable during power-up or hot insertion.
• Outputs protected against ±10kV electrostatic discharge using the Human Body Model.
• Slew-rate limiting minimizes electromagnetic interference and reduces reflections caused by improperly terminated cables.
• Pin-compatible with industry-standard 'SN75174 and 'DS26LS31C devices.

Applications

• Telecommunications equipment
• Industrial motor control systems
• Transmitter for ESD-sensitive applications
• Hand-held equipment
• Industrial PLCs

Procurement Notes

Verify the component manufacturer as Analog Devices Inc./Maxim Integrated when sourcing. Confirm the specific suffix indicates the wide SOIC package variant. Ensure the ordering information matches the required extended temperature range specifications for your application environment.

Selection Notes

Select this component for designs requiring quad differential transmission over twisted-pair balanced lines. It serves as a low-power upgrade to legacy interface standards. Verify compatibility with standard RS-485 and RS-422 receiver families for optimal system performance.

Part Context

This part belongs to the MAX3040–MAX3045 family of 5V quad transmitters. The MAX3040 specifically provides 250kbps data rates with slew-rate limiting. Other family members offer higher speeds up to 20Mbps. The family shares pinouts compatible with older industry standards.

Replacement Considerations

Public confirmed substitutes include the MAX3040CWE+, MAX3040ESE, and MAX3040EUE. These variants share identical electrical characteristics but differ in operating temperature ranges and physical packaging types.