MAX3042BEWE+T

Overview

The MAX3042BEWE+T is a quad RS-485/RS-422 transmitter from the MAX3040–MAX3045 family, designed for digital data transmission over twisted-pair balanced lines. 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 20Mbps with a typical driver propagation delay of 23ns. All outputs are protected against ±10kV electrostatic discharge (Human Body Model) and withstand ±4kV Electrical Fast Transient/Burst stress per IEC 1000-4-4. It features hot-swap capability to prevent false transitions during power-up or insertion.

Feature Summary

• Hot-swap capability prevents erroneous data transfer during board insertion or power-up sequences.
• Robust protection against ±10kV ESD and ±4kV electrical fast transient bursts ensures reliability in harsh environments.
• Low-power operation includes a 1mA active supply current and a 2nA shutdown mode.
• Pin-compatible with industry-standard 'SN75174 and 'DS26LS31C devices.

Applications

• Telecommunications equipment
• Industrial motor control systems
• Transmitter applications requiring ESD-sensitive protection
• Hand-held industrial equipment
• Industrial PLCs and networking

Procurement Notes

Verify the component authenticity by checking the manufacturer marking against the official datasheet specifications. Confirm the package type matches the wide SO-16 configuration and ensure the temperature range corresponds to the 'E' suffix (-40°C to +85°C). Cross-reference the ordering information table to validate the specific part number variant before integration into production.

Selection Notes

Select this component when high-speed data rates up to 20Mbps are required alongside robust ESD protection. It serves as a direct upgrade to legacy SN75174 designs, offering improved performance without pin changes. Ensure the system utilizes compatible receivers such as the MAX3093E or MAX3095 for optimal differential line performance.

Part Context

This device belongs to the MAX3040–MAX3045 family of 5V quad transmitters. While other variants in the series support lower data rates like 250kbps or 2.5Mbps, the MAX3042B variant is specifically optimized for speeds up to 20Mbps. It shares the same physical footprint and pinout as slower versions within the same product family.

Replacement Considerations

Publicly confirmed substitutes include the MAX3045BEWE+T, which offers identical functionality and pin compatibility. Legacy replacements such as the SN75174 or DS26LS31C can be replaced directly due to pin compatibility, though the Maxim Integrated version provides enhanced ESD protection and lower power consumption.