MAX14939GWE+

Digital Isolators Overview

The MAX14939GWE+ is an isolated RS-485/PROFIBUS-DP transceiver featuring 2750Vrms galvanic isolation. It supports data rates up to 20Mbps in a half-duplex configuration. The device integrates three channels with a 2-input, 1-output logic orientation. It provides high common-mode transient immunity of 35kV/s and includes 35kV ESD protection on the bus pins. Operating voltages range from 1.71V to 5.5V for logic and 4.5V to 5.5V for the driver. It functions within a temperature range of -40°C to +105°C and is housed in a 16-SOIC package.

Digital Isolators Feature Summary

• Provides 2750Vrms galvanic isolation between the cable side and logic side
• Integrates 35kV electrostatic discharge (ESD) protection on the RS-485 bus pins
• Delivers high common-mode transient immunity of 35kV/s typical value
• Supports PROFIBUS and RS-485 communication protocols at speeds up to 20Mbps

Digital Isolators Applications

• Industrial automation systems requiring robust fieldbus communication
• PROFIBUS-DP network nodes needing high noise immunity
• Factory automation equipment operating in electrically noisy environments
• Process control systems utilizing isolated RS-485 interfaces

Digital Isolators Procurement Notes

Verify the specific suffix and tape-and-reel versus tube packaging options available from authorized distributors. Confirm that the component meets RoHS compliance standards required for your assembly process. Ensure the supplier is an authorized Analog Devices partner to guarantee authenticity. Check for any specific handling requirements related to moisture sensitivity levels during storage and reflow soldering.

Digital Isolators Selection Notes

Select this component when designing systems that require both signal isolation and integrated ESD protection on the RS-485 lines. It is suitable for applications where space is limited due to its integration of the transceiver and isolator. Consider the 20Mbps speed limit when choosing between this and higher-speed alternatives. Verify that the 2750Vrms isolation rating meets the safety standards of your target market.

Digital Isolators Part Context

This part belongs to the MAX1493x family of isolated interface devices from Maxim Integrated, now part of Analog Devices. The family includes various configurations of digital isolators and transceivers designed for industrial communication standards. These components are engineered to replace traditional optocoupler-based solutions, offering improved performance and smaller form factors for modern embedded systems.

Digital Isolators Replacement Considerations

Check for direct pin-compatible substitutes within the MAX1493x series that may offer different channel counts or isolation ratings. Verify compatibility with existing board layouts if replacing with other SOIC-16 isolated transceivers. Ensure any alternative maintains the required 35kV ESD protection level on the bus pins.