MAX3045BEWE+T

Overview

The MAX3045BEWE+T is a quad RS-485/RS-422 transmitter manufactured by Analog Devices Inc./Maxim Integrated. 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 current is 1mA, with a shutdown mode consuming 2nA. It is housed in a 16-pin Wide SO package and functions within a 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 on all driver outputs.
• 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
• Networking infrastructure
• Industrial PLCs

Procurement Notes

Verify the component authenticity through official manufacturer channels or authorized distributors. Confirm the specific ordering suffix matches the required package type and temperature rating. Ensure compliance with RoHS standards as indicated by the '+' designation. Cross-reference the datasheet revision to confirm pinout and electrical characteristics align with system requirements before procurement.

Selection Notes

Select this component for applications requiring high-speed differential transmission up to 20Mbps over twisted-pair lines. It is suitable for environments demanding robust ESD and transient immunity without external protection components. Consider the 16-pin Wide SO package constraints for PCB layout. Verify that the single +5V supply voltage aligns with the system power architecture.

Part Context

This part belongs to the MAX3040–MAX3045 family of 5V quad RS-485/RS-422 transmitters. The MAX3045B variant specifically targets higher data rates compared to the MAX3040/MAX3043 (250kbps) and MAX3041/MAX3044 (2.5Mbps). It serves as a low-power, ESD-protected upgrade to legacy interface standards.

Replacement Considerations

The MAX3045BEWE+T is pin-compatible with the 'SN75174 and 'DS26LS31C. Designers upgrading from these legacy parts should verify that the new hot-swap logic and enable pin configurations meet the existing circuit design requirements.