MAX3040ESE+

Overview

The MAX3040ESE+ is a quad RS-485/RS-422 transmitter manufactured by Analog Devices Inc./Maxim Integrated. It operates on a single +5V supply and supports data rates up to 250kbps with slew-rate limiting to minimize EMI. The device features ±10kV Human Body Model ESD protection and ±4kV Electrical Fast Transient immunity per IEC 1000-4-4. It includes hot-swap capability for telecom applications and offers a low-power shutdown mode consuming 2nA. The component is housed in a 16-pin Narrow SO package and functions within an operating temperature range of -40°C to +85°C.

Feature Summary

• Integrated hot-swap capability prevents false transitions during power-up or hot insertion.
• Slew-rate limited outputs reduce reflections caused by improperly terminated cables.
• Robust protection against electrostatic discharge and electrical fast transients.

Applications

• Telecommunications Equipment
• Industrial Motor Control
• Transmitter for ESD-Sensitive Applications
• Hand-Held Equipment
• Industrial PLCs

Procurement Notes

Verify the specific ordering suffix to confirm the package type and temperature grade, as these define the physical form factor and operational limits. Confirm RoHS compliance status through official manufacturer documentation before procurement. Ensure the source provides valid traceability for the Analog Devices/Maxim Integrated brand.

Selection Notes

Select this component when designing systems requiring quad differential transmission over twisted-pair lines at speeds up to 250kbps. It serves as a pin-compatible upgrade to industry-standard drivers like the SN75174. Consider the narrow SO package constraints for space-limited PCB layouts requiring surface-mount assembly.

Part Context

This part belongs to the MAX3040–MAX3045 family of 5V quad RS-485/RS-422 transmitters. While other members of the family support higher data rates such as 2.5Mbps or 20Mbps, the MAX3040 variant specifically targets lower-speed applications where slew-rate limiting helps mitigate electromagnetic interference issues.

Replacement Considerations

The datasheet identifies the 'SN75174, 'DS26LS31C, and LTC487 as pin-compatible industry-standard replacements. Verify that substitute components meet the required ESD protection levels and hot-swap functionality specifications.