MAX3042BESE+

Overview

The MAX3042BESE+ is a quad RS-485/RS-422 transmitter designed for digital data transmission over twisted-pair balanced lines. It operates from a single +5V power 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 typically 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 transient immunity with ±10kV HBM ESD protection and ±4kV IEC 1000-4-4 burst stress tolerance.
• Low-power operation with 1mA active supply current and 2nA shutdown mode consumption.
• Pin-compatible with industry-standard 'SN75174 and 'DS26LS31C devices.

Applications

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

Procurement Notes

Verify the specific suffix 'E' indicates the extended temperature range of -40°C to +85°C. Confirm the 'SE' designation corresponds to the 16-pin Narrow SO package type. Ensure the '+T' variant matches reel packaging requirements if applicable. Cross-reference the manufacturer's latest datasheet revision to confirm pinout consistency with legacy SN75174 designs.

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 with significant electrical noise due to its robust EFT and ESD ratings. Use this part where hot-plugging capabilities are necessary to protect the bus during system initialization. Ensure the application utilizes a single +5V supply rail compatible with the specified operating voltage range.

Part Context

This device belongs to the MAX3040–MAX3045 family of quad transmitters. The MAX3042B variant specifically targets higher data throughput compared to the 2.5Mbps MAX3041 or 250kbps MAX3040. It serves as a low-power, ESD-protected upgrade to older discrete driver solutions, offering integrated protection structures within a compact surface-mount footprint.

Replacement Considerations

Direct pin-compatible replacements include the 'SN75174 and 'DS26LS31C. Other Maxim Integrated options within the same family include the MAX3041 (2.5Mbps) and MAX3040 (250kbps) for lower speed requirements. Verify that substitute parts meet the specific ±10kV ESD and ±4kV EFT immunity specifications required by the design.