MAX3040EWE+T

Overview

The MAX3040EWE+T 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 a shutdown current of 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 utilizes hot-swap capability to prevent false transitions during power-up or insertion. The component 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 prevents erroneous data transfer during board insertion or power-up sequences.
• Integrated ±10kV Human Body Model ESD protection and ±4kV IEC 1000-4-4 fast transient burst immunity.
• Low-power operation with 1mA active supply current and 2nA shutdown mode consumption.
• Slew-rate limited outputs minimize electromagnetic interference and cable reflections.

Applications

• Telecommunications equipment
• Industrial motor control systems
• Hand-held equipment
• Industrial PLCs
• Networking applications

Procurement Notes

Verify the specific ordering suffix '+T' indicates tape-and-reel packaging when sourcing this component. Confirm that the 'E' designation corresponds to the extended industrial temperature range of -40°C to +85°C. Ensure compatibility with the 16-pin Wide SOIC footprint during PCB layout. Cross-reference the manufacturer's latest documentation for any pinout or electrical specification updates.

Selection Notes

Select the MAX3040EWE+T for applications requiring quad differential transmission at data rates up to 250kbps. This model is suitable for environments demanding robust ESD and fast transient immunity without integrated receivers. Consider the wide SO package for thermal dissipation needs. Verify that the system design accommodates the specific enable logic requirements for the MAX3040 variant.

Part Context

This component belongs to the MAX3040–MAX3045 family of 5V quad transmitters designed for twisted-pair balanced lines. It serves as a low-power, ESD-protected upgrade to industry-standard devices like the SN75174 and DS26LS31C. The family offers various speed options, with the MAX3040 specifically optimized for lower data rate applications requiring slew-rate limiting.

Replacement Considerations

Public confirmed substitutes include the SN75174 and DS26LS31C due to pin compatibility. The LTC487 is also listed as a pin-compatible alternative within the same product family context.