MAX3044ESE+T

Overview

The MAX3044ESE+T is a quad RS-485/RS-422 transmitter operating from a single +5V supply. It supports data rates up to 2.5Mbps with slew-rate limiting to minimize EMI and reflections. The device features ±10kV Human Body Model ESD protection on all outputs 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. Operating supply current is 1mA, with a low-power shutdown mode consuming 2nA. It operates within a temperature range of -40°C to +85°C and is housed in a 16-pin Narrow SO package.

Feature Summary

• Slew-rate limited outputs for reduced electromagnetic interference
• Hot-swap inputs prevent erroneous data during board insertion
• Robust output protection against electrostatic discharge and fast transients
• Low-power shutdown mode for energy conservation

Applications

• Telecommunications equipment
• Industrial motor control systems
• Transmitter applications requiring ESD sensitivity
• Hand-held industrial equipment
• Industrial PLC networks

Procurement Notes

Verify the specific suffix 'ESE' corresponds to the 16-pin Narrow SOIC package and the '-E' grade indicates the extended industrial temperature range of -40°C to +85°C. Confirm that the '+T' designation aligns with the required reel packaging format for surface-mount assembly processes. Ensure compatibility with existing PCB footprints designed for standard narrow SOIC dimensions.

Selection Notes

Select this component when a 2.5Mbps data rate is sufficient and slew-rate limiting is required to mitigate signal reflections on improperly terminated cables. It serves as a pin-compatible upgrade to legacy industry-standard drivers like the SN75174. Choose this part over higher-speed variants if minimizing electromagnetic emissions is a primary design constraint for the communication bus.

Part Context

This device belongs to the MAX3040–MAX3045 family of 5V quad transmitters. While other members support 250kbps or 20Mbps, the MAX3044 specifically targets the 2.5Mbps tier. It shares the same physical footprint and pinout architecture as the rest of the series, allowing for flexible design scaling across different speed requirements without changing the mechanical layout.

Replacement Considerations

The datasheet identifies the 'SN75174 and 'DS26LS31C as industry-standard predecessors. The MAX3044 offers pin-compatible functionality while providing enhanced ESD protection and lower power consumption compared to these legacy components.