MAX3042BEWE+

Overview

The MAX3042BEWE+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 maximum data rate of 20Mbps and an operating temperature range of -40°C to +85°C. The device features ±10kV ESD protection via the Human Body Model and withstands ±4kV Electrical Fast Transient/Burst stress per IEC 1000-4-4. It includes hot-swap capability to prevent false transitions during power-up or insertion, consumes 1mA of operating supply current, and enters a low-power shutdown mode drawing only 2nA. The component is housed in a 16-pin Wide SO package.

Feature Summary

• Hot-swap capability eliminates false transitions on the data cable during power-up or hot insertion
• Outputs protected to ±10kV using the Human Body Model and withstand ±4kV per IEC 1000-4-4 Electrical Fast Transient/Burst Stressing
• Low-power shutdown mode draws 2nA while operating supply current is limited to 1mA
• Pin-compatible with industry-standard 'SN75174 and 'DS26LS31C

Applications

• Telecommunications Equipment
• Industrial Motor Control
• Transmitter for ESD-Sensitive Applications
• Hand-Held Equipment
• Industrial PLCs

Procurement Notes

Verify the specific ordering suffix against official manufacturer documentation to confirm the exact package type, temperature range, and lead-free status. Confirm that the '+T' designation corresponds to the reel packaging format required for your assembly process. Ensure compatibility with existing board layouts due to pin-out similarities with legacy components.

Selection Notes

Select this component when high-speed data transmission up to 20Mbps is required over twisted-pair balanced lines. It is suitable for environments requiring robust ESD and fast transient immunity. Consider pairing with MAX3093E or MAX3095 receivers for optimum performance. Verify that the wide SO package dimensions fit within the available PCB space constraints.

Part Context

This part belongs to the MAX3040–MAX3045 family of 5V quad RS-485/RS-422 transmitters. While other members of the family offer lower data rates such as 250kbps or 2.5Mbps, the MAX3042B variant is specifically optimized for higher speed applications up to 20Mbps. The family shares common features like hot-swap inputs and ESD protection but differs in switching characteristics and slew-rate limiting options.

Replacement Considerations

The datasheet confirms pin-compatibility with the industry-standard SN75174 and DS26LS31C. Designers upgrading from these legacy parts should verify that the new ESD protection levels and hot-swap functionality align with system requirements.