MAX3043CSE+

Overview

The MAX3043CSE+ 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 250kbps. The device features ±10kV Human Body Model ESD protection and ±4kV IEC 1000-4-4 Electrical Fast Transient immunity. It includes hot-swap capability to prevent false transitions during power-up or insertion. The unit consumes 1mA of operating supply current and enters a low-power shutdown mode with 2nA consumption. It is housed in a 16-pin Narrow SO package and operates within a temperature range of 0°C to +70°C.

Feature Summary

• Hot-swap capability prevents erroneous data transfer during board insertion or power-up sequences.
• Slew-rate limiting minimizes electromagnetic interference (EMI) and reduces signal reflections on improperly terminated cables.
• Integrated high-level ESD protection withstands ±10kV Human Body Model discharges and ±4kV fast transient bursts.
• Low-power operation provides 1mA active supply current and 2nA shutdown current for energy efficiency.

Applications

• Telecommunications equipment
• Industrial motor control systems
• Transmitter stages for ESD-sensitive applications
• Hand-held industrial equipment
• Industrial PLCs

Procurement Notes

Verify the specific ordering suffix 'CSE+' against official manufacturer documentation to confirm the commercial temperature range and narrow SOIC-16 package configuration. Ensure compatibility with existing system voltage levels and interface requirements before procurement. Cross-reference the component marking code with datasheet specifications to authenticate the source and avoid counterfeit components.

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 parts like the SN75174. Consider the MAX3043E variant if an extended industrial temperature range (-40°C to +85°C) is required instead of the commercial grade specified for the C suffix.

Part Context

This part belongs to the MAX3040–MAX3045 family of 5V quad RS-485/RS-422 transmitters. These devices are designed for digital data transmission over balanced lines and offer optimum performance when paired with compatible receivers such as the MAX3093E, MAX3095, MAX3094E, or MAX3096.

Replacement Considerations

The MAX3043CSE+ is pin-compatible with the 'SN75174, 'DS26LS31C, and LTC487. Verify that replacement options maintain the same 250kbps data rate specification and ensure the substitute device supports the required hot-swap functionality and ESD protection levels.

FAQ

How does the MAX3043 handle hot-swap events?

The device features hot-swap inputs that hold the enable pins in a disabled state during power-up or board insertion, preventing false transitions and erroneous data transfer on the bus.

What is the maximum data rate for the MAX3043?

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

What ESD protection levels are 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.