MAX3043EUE+

Overview

The MAX3043EUE+ is a quad RS-422 transmitter designed for digital data transmission over twisted-pair balanced lines. It operates from a single +5V supply and supports data rates up to 250kbps. The device features ±10kV ESD protection (Human Body Model) and ±4kV Electrical Fast Transient immunity per IEC 1000-4-4. It includes hot-swap capability to prevent false transitions during power-up or insertion. The unit is housed in a 16-pin TSSOP package and operates 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.
• Robust transient protection with ±10kV HBM ESD tolerance and ±4kV IEC fast transient burst immunity.
• Slew-rate limiting minimizes electromagnetic interference and reduces signal reflections on improperly terminated cables.
• Low-power shutdown mode consumes only 2nA when enabled inputs are deactivated.

Applications

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

Procurement Notes

Verify the component designation against official manufacturer documentation to confirm the specific 'E' suffix indicates the extended temperature range (-40°C to +85°C). Ensure the ordering information matches the required pin-package configuration and data rate specifications before procurement.

Selection Notes

Select this model for RS-422 networks requiring robust protection against electrostatic discharge and electrical fast transients. The slew-rate limited design is suitable for minimizing EMI in noisy environments. Verify compatibility with standard RS-422 receivers such as the MAX3093E or MAX3095 for optimal system performance.

Part Context

This component belongs to the MAX3040–MAX3045 family of quad RS-485/RS-422 transmitters manufactured by Analog Devices / Maxim Integrated. These devices serve as low-power, ESD-protected upgrades to industry-standard drivers like the SN75174 and DS26LS31C, offering enhanced reliability for serial communication interfaces.

Replacement Considerations

The MAX3043EUE+ is pin-compatible with the SN75174, DS26LS31C, and LTC487. When replacing legacy components, verify that the new driver meets the specific voltage levels and termination requirements of the existing bus architecture.

FAQ

How does the MAX3043 handle hot-swap events?

The device utilizes internal circuitry to hold enable inputs in a disabled state during power-up or hot insertion, preventing false transitions on the data cable caused by leakage currents or parasitic capacitance.

What is the maximum data rate for the MAX3043?

The MAX3043 is optimized for data transfer rates up to 250kbps and features slew-rate limiting to minimize EMI and reduce reflections.

What type of ESD protection is provided?

All transmitter outputs are protected to ±10kV using the Human Body Model and withstand ±4kV per IEC 1000-4-4 Electrical Fast Transient/Burst Stressing.