MAX14946EWE+T

Drivers, Receivers, Transceivers Overview

The MAX14946EWE+T is a half-duplex RS-485/RS-422 transceiver providing 2750V RMS galvanic isolation between the UART and cable sides. It supports data rates up to 500kbps with ±30kV ESD protection on bus pins. The device integrates a 450kHz transformer driver for power transfer across the isolation barrier and an internal LDO regulating VDDB to 5V. Operating from a 3.0V to 5.5V VDDA supply, it features true fail-safe circuitry, thermal shutdown at +160°C, and undervoltage lockout. Packaged in a 16-pin wide SOIC, it operates within a -40°C to +85°C temperature range.

Drivers, Receivers, Transceivers Feature Summary

• Integrated transformer driver enables efficient power transfer across the isolation barrier using an external center-tapped transformer.
• Built-in low-dropout regulator provides a stable 5V supply for the isolated cable-side logic without external components.
• True fail-safe receiver ensures a logic-high output state when inputs are shorted or open-circuited.
• High common-mode transient immunity of 35 kV/μs maintains signal integrity during rapid ground potential changes.

Drivers, Receivers, Transceivers Applications

• Industrial Automation Equipment
• Programmable Logic Controllers
• HVAC Systems
• Power Meters

Drivers, Receivers, Transceivers Procurement Notes

Verify component authenticity by checking the manufacturer's marking against official datasheet specifications. Confirm the package type matches the 16-pin wide SOIC format. Ensure the ordering suffix corresponds to the required tape-and-reel configuration if applicable. Cross-reference the UL certification file number for safety compliance requirements.

Drivers, Receivers, Transceivers Selection Notes

Select this component when high-voltage isolation is required between control logic and field buses. The integrated power transfer simplifies designs by eliminating separate isolated power supplies. Verify that the external transformer selected meets the minimum ET product requirement to prevent saturation under maximum load conditions.

Drivers, Receivers, Transceivers Part Context

This part belongs to the MAX1494x family of isolated transceivers designed for robust industrial communication. It shares architectural similarities with the MAX14949 but offers specific integration levels suited for standard RS-485 networks. The wide-body package facilitates higher creepage and clearance distances compared to standard SOIC packages.

Drivers, Receivers, Transceivers Replacement Considerations

Public confirmed substitute part numbers: MAX14945EWE+T, MAX14949EWE+T.