MAX14789EGSA+

Drivers, Receivers, Transceivers Overview

The MAX14789EGSA+ is a full-duplex RS-485 transceiver designed for high-speed communication in harsh industrial environments. It operates from a 3.0V to 5.5V supply with a maximum no-load supply current of 4mA. The device supports data rates up to 25Mbps and features ±35kV ESD protection on the RS-485 pins. It includes true fail-safe receiver circuitry, thermal shutdown, and short-circuit protected outputs. The component is housed in an 8-pin SO package and operates within a temperature range of -40°C to +105°C.

Drivers, Receivers, Transceivers Feature Summary

• Supports full-duplex or half-duplex configurations with integrated driver and receiver enable/disable functionality
• Provides robust signal integrity through true fail-safe receivers that guarantee a logic-high output when inputs are open or shorted
• Features ±35kV Human Body Model ESD protection on RS-485 I/O ports to withstand harsh environmental conditions
• Includes thermal shutdown and short-circuit protection mechanisms to prevent damage during fault conditions

Drivers, Receivers, Transceivers Applications

• Motion Controllers
• Encoder Interfaces
• HVAC Control Systems
• Utility Meters

Drivers, Receivers, Transceivers Procurement Notes

Verify the specific ordering suffix against official manufacturer documentation to confirm package type and RoHS compliance status. Ensure the selected variant matches the required operating temperature range and data rate specifications for the target application environment before procurement.

Drivers, Receivers, Transceivers Selection Notes

Select this component for applications requiring high-speed full-duplex RS-485 communication with significant ESD exposure risks. The 25Mbps data rate capability distinguishes it from slew-rate limited variants in the same family. Verify compatibility with system voltage levels and ensure adequate thermal management for the 8-SO package.

Drivers, Receivers, Transceivers Part Context

This part belongs to the MAX14784E/MAX14786E/MAX14787E/MAX14789E family of full-duplex RS-485 transceivers. Unlike the MAX14787E, which is limited to 500kbps, the MAX14789E provides higher speed performance at 25Mbps while maintaining the compact 8-pin SO footprint and extended industrial temperature rating.

Drivers, Receivers, Transceivers Replacement Considerations

The MAX14786EAUD+ serves as a direct functional substitute offering identical 25Mbps performance and feature set, differing only in the 14-pin TSSOP package format instead of the 8-pin SO configuration.

Drivers, Receivers, Transceivers FAQ

Does the MAX14789EGSA+ support half-duplex operation?

Yes, although designed as a full-duplex transceiver, it can be configured for half-duplex operation by connecting the Y output to the A input and the Z output to the B input.

What is the fail-safe behavior of the receiver?

The device guarantees a logic-high receiver output when the differential receiver input voltage is greater than or equal to -10mV, ensuring a defined state when inputs are open, shorted, or connected to a terminated line with all drivers disabled.

How does the device protect against excessive power dissipation?

The transceiver incorporates thermal shutdown circuitry that forces the driver outputs into a high-impedance state if the die temperature exceeds approximately +160°C, alongside short-circuit current limiting on the output stage.