MAX3042BESE+T

Overview

The MAX3042BESE+T is a quad RS-485/RS-422 transmitter designed for digital data transmission over twisted-pair balanced lines. It operates from a single +5V supply and supports data rates up to 20Mbps. The device features ±10kV ESD protection (Human Body Model) and ±4kV Electrical Fast Transient/Burst immunity per IEC 1000-4-4. It includes hot-swap capability to prevent false transitions during power-up or insertion. Operating supply current is 1mA, with a shutdown mode consuming 2nA. It is housed in a 16-pin Narrow SO package.

Feature Summary

• Hot-swap capability prevents erroneous data transfer during board insertion or power-up sequences.
• Robust electromagnetic compatibility with ±10kV HBM ESD protection and ±4kV IEC 1000-4-4 EFT immunity.
• Ultra-low power consumption with 1mA operating current and 2nA shutdown mode.
• Pin-compatible with industry-standard SN75174 and DS26LS31C devices.

Applications

• Telecommunications equipment
• Industrial motor control systems
• Programmable Logic Controllers (PLCs)
• Networking infrastructure

Procurement Notes

Verify the complete part number including suffixes such as '+T' for reel packaging and 'E' for industrial temperature range against official distributor catalogs. Confirm RoHS compliance status and ensure the narrow SOIC-16 footprint matches the target PCB layout requirements before finalizing procurement orders.

Selection Notes

Select this component when high-speed data rates up to 20Mbps are required on RS-485 or RS-422 buses. It is suitable for environments requiring strong ESD and transient immunity. Ensure the system design accommodates the 16-pin narrow SO package dimensions and utilizes appropriate termination resistors to minimize signal reflections.

Part Context

This device belongs to the MAX3040–MAX3045 family of quad transmitters. While other variants in the series offer lower data rates like 250kbps or 2.5Mbps, the MAX3042B variant specifically targets applications needing faster throughput. It serves as a low-power, protected upgrade to legacy interface drivers.

Replacement Considerations

The datasheet confirms pin compatibility with the industry-standard SN75174 and DS26LS31C. Designers replacing these legacy components should verify that the new device's electrical characteristics meet the specific system requirements for speed and drive strength.