MAX3042BCWE+

Overview

The MAX3042BCWE+ 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 20Mbps. The device features ±10kV ESD protection (Human Body Model) and ±4kV Electrical Fast Transient/Burst immunity per IEC 1000-4-4. It includes hot-swap capability to prevent false transitions during power-up or insertion. The part is housed in a 16-pin Wide 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.
• Robust output protection against electrostatic discharge and electrical fast transients.
• Low-power shutdown mode with minimal current consumption when disabled.
• Pin-compatible with industry-standard 'SN75174, 'DS26LS31C, and LTC487 devices.

Applications

• Telecommunications equipment
• Industrial motor control systems
• Industrial PLCs
• Networking infrastructure

Procurement Notes

Verify the specific suffix 'WE+' corresponds to the 16-pin Wide SOIC package and industrial temperature grade (0°C to +70°C). Confirm RoHS compliance status through official manufacturer documentation prior to integration. Ensure pinout alignment with legacy SN75174 designs if used as a direct replacement.

Selection Notes

Select this component for applications requiring high-speed differential transmission up to 20Mbps on twisted-pair lines. It is suitable for environments demanding strong ESD and transient immunity without external protection components. Consider the wide SO package for thermal dissipation needs compared to narrower variants.

Part Context

This device belongs to the MAX3040–MAX3045 family of 5V quad transmitters. The MAX3042B variant specifically targets higher data rate requirements compared to the 250kbps or 2.5Mbps versions in the same series. It serves as a low-power, protected upgrade for legacy interface drivers in industrial and telecom sectors.

Replacement Considerations

Publicly confirmed pin-compatible substitutes include the 'SN75174, 'DS26LS31C, and LTC487. Verify that replacement parts meet the required 20Mbps data rate and ESD protection specifications before implementation.

FAQ

How does the hot-swap feature function?

The hot-swap inputs hold the enable pins in a disabled state during power-up or board insertion, preventing false transitions on the data cable caused by leakage currents or parasitic capacitance.

What is the maximum data rate for the MAX3042B?

The MAX3042B is optimized for data transfer rates up to 20Mbps.

Is the device compatible with standard RS-485 receivers?

Yes, it offers optimum performance when used with MAX3093E/MAX3095 5V quad differential line receivers or MAX3094E/MAX3096 3V quad differential line receivers.