MAX3043CUE+

Overview

The MAX3043CUE+ 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 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. 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 TSSOP package and operates within a temperature range of 0°C to +70°C.

Feature Summary

• Slew-rate limited outputs minimize electromagnetic interference (EMI) and reduce signal reflections caused by improperly terminated cables.
• Hot-swap inputs maintain transmitters in a disabled state during power-up or board insertion, preventing erroneous data transfer.
• Outputs are protected against electrostatic discharges up to ±10kV (Human Body Model) and ±4kV fast transient bursts.
• Pin-compatible with industry-standard 'SN75174 and 'DS26LS31C devices for easy upgrades.

Applications

• Telecommunications equipment
• Industrial motor control systems
• Transmitter applications involving ESD-sensitive environments
• Hand-held equipment
• Industrial PLCs

Procurement Notes

Verify the component authenticity by checking the manufacturer markings and datasheet revision numbers. Confirm that the ordering suffix matches the required temperature range and package type. Ensure compliance with RoHS directives if applicable. Cross-reference the part number with official distributor catalogs to validate availability and specifications before procurement.

Selection Notes

Select the MAX3043CUE+ when designing systems requiring RS-485 or RS-422 communication at speeds up to 250kbps. This model is suitable for applications needing slew-rate limiting to reduce EMI. It serves as a direct pin-compatible replacement for legacy SN75174 and DS26LS31C transmitters. Ensure the system operates within the specified 0°C to +70°C temperature range.

Part Context

The MAX3043CUE+ belongs to the MAX3040–MAX3045 family of quad 5V RS-485/RS-422 transmitters. This family provides various data rate options, including 250kbps, 2.5Mbps, and 20Mbps variants. The MAX3043 specifically targets lower-speed applications with slew-rate limiting. It is designed to work optimally with Maxim's MAX3093E/MAX3095 receivers.

Replacement Considerations

The MAX3043CUE+ is pin-compatible with the 'SN75174 and 'DS26LS31C. Designers can substitute these legacy components directly without schematic changes. Verify that the replacement part meets the specific environmental and electrical requirements of the original design.

FAQ

How does the MAX3043 handle hot-swap events?

The MAX3043 features hot-swap capable enable inputs that hold the transmitters in a disabled state during power-up or board insertion. This prevents false transitions and erroneous data transfer on the bus.

What is the maximum data rate for the MAX3043?

The MAX3043 supports a maximum data rate of 250kbps. It is a slew-rate limited transmitter designed to minimize EMI and reflections.

Is the MAX3043 compatible with standard RS-485 receivers?

Yes, the MAX3043 offers optimum performance when used with standard quad differential line receivers such as the MAX3093E, MAX3095, MAX3094E, or MAX3096.