MAX489EESD+T

Drivers, Receivers, Transceivers Overview

The MAX489EESD+T is a low-power, full-duplex RS-422/RS-485 transceiver manufactured by Analog Devices Inc./Maxim Integrated. It features one driver and one receiver housed in a 14-pin SOIC package. The device operates from a single +5V supply (4.75V to 5.25V) with a maximum data rate of 250kbps due to slew-rate limiting. It provides ±15kV ESD protection on all pins without latchup. Key electrical characteristics include a typical no-load supply current of 350µA, a receiver input hysteresis of 70mV, and propagation delays ranging from 1.38µs to 4µs. It functions within an operating temperature range of -40°C to +85°C.

Drivers, Receivers, Transceivers Feature Summary

• Full-duplex communication capability with independent driver and receiver enable controls.
• Integrated ±15kV electrostatic discharge (ESD) protection on all pins ensuring robustness in harsh environments.
• Slew-rate-limited driver output minimizes electromagnetic interference (EMI) and reduces signal reflections.
• Fail-safe receiver input guarantees a logic-high output state when the differential input is open-circuited.

Drivers, Receivers, Transceivers Applications

• Low-power RS-485 communication networks
• Low-power RS-422 communication networks
• Industrial control local area networks
• Transceivers for EMI-sensitive applications

Drivers, Receivers, Transceivers Procurement Notes

Verify the specific ordering suffix against official manufacturer documentation to confirm package type and temperature range. Confirm RoHS compliance status through the latest datasheet or component declaration. Ensure the source document explicitly identifies the part as the MAX489 variant within the MAX48xE family to avoid confusion with similar half-duplex models.

Drivers, Receivers, Transceivers Selection Notes

Select this component for full-duplex applications requiring reduced EMI compared to non-slew-rate-limited variants. Verify that the 250kbps data rate limit meets system requirements, as other family members support higher speeds. Ensure the design accommodates the 14-pin SOIC footprint and +5V supply constraints. Consider the fail-safe feature if bus disconnection handling is critical.

Drivers, Receivers, Transceivers Part Context

This device belongs to the MAX481E/MAX483E/MAX485E/MAX487E–MAX491E family of low-power transceivers. Unlike the half-duplex MAX485E, the MAX489E supports full-duplex operation. It shares the ruggedized ESD protection and low-power shutdown capabilities found in other 'E' series parts, designed for reliable bidirectional data communications on multipoint bus transmission lines.

Drivers, Receivers, Transceivers Replacement Considerations

Publicly confirmed substitutes include the MAX491EESD+T, which offers identical pinout and functionality within the same family. Other compatible options are the MAX488EESD+T and MAX490EESD+T, provided the application utilizes full-duplex architecture. Verify thermal and electrical specifications match before substitution.