MAX3044CUE+

Overview

The MAX3044CUE+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 2.5Mbps with slew-rate limiting to minimize EMI. The device features ±10kV Human Body Model ESD protection 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. The part is housed in a 16-pin TSSOP package, operates within a temperature range of 0°C to +70°C, and consumes 1mA operating current with a 2nA shutdown mode.

Feature Summary

• Hot-swap capability prevents erroneous data transfer during board insertion or power-up sequences.
• Slew-rate limited outputs reduce signal reflections on improperly terminated cables.
• Robust transient immunity meets IEC 1000-4-4 standards for electrical fast transients.
• Low-power shutdown mode significantly reduces standby current consumption.

Applications

• Telecommunications equipment
• Industrial motor control systems
• Hand-held measurement equipment
• Industrial programmable logic controllers (PLCs)
• Networking infrastructure

Procurement Notes

Verify the component authenticity through official manufacturer channels or authorized distributors. Confirm the specific suffix matches the required thermal and packaging specifications. Ensure compliance with RoHS directives and lead-free manufacturing standards before integration into production assemblies.

Selection Notes

Select this model when interfacing with RS-485 or RS-422 networks requiring 2.5Mbps transmission speeds. It serves as a direct pin-compatible replacement for legacy SN75174 and DS26LS31C drivers. Choose this variant for applications demanding high ESD tolerance and minimal electromagnetic interference generation.

Part Context

This component belongs to the MAX3040–MAX3045 family of quad transmitters designed for balanced line communication. The MAX3044 specifically targets the 2.5Mbps performance tier within the series. It complements receiver families such as the MAX3093E and MAX3095 for complete differential signaling solutions.

Replacement Considerations

The MAX3044 is pin-compatible with industry-standard 'SN75174 and 'DS26LS31C devices. Verify that substitute components maintain identical enable logic configurations and voltage levels to ensure seamless circuit integration without hardware modifications.

FAQ

How does the MAX3044 handle hot-swap events?

The device utilizes internal circuitry to hold enable inputs low during power ramp-up, preventing false transmitter activation and ensuring the differential signal remains above the 200mV specification threshold.

What is the purpose of the slew-rate limitation?

Slew-rate limiting minimizes electromagnetic interference (EMI) and reduces signal reflections caused by improperly terminated cables, allowing for error-free transmission over twisted-pair lines.

Which receivers provide optimum performance with this transmitter?

Optimum performance is achieved when used with the MAX3093E or MAX3095 5V quad differential line receivers, or the MAX3094E/MAX3096 3V quad differential line receivers.