MAX3089ESD+T

Overview

The MAX3089ESD+T is a high-speed RS-422/RS-485 transceiver featuring one driver and one receiver in a 14-pin SOIC package. It operates on a single +5V supply (4.75V to 5.25V) with a typical quiescent current of 375µA. The device supports selectable data rates of 115kbps, 500kbps, and 10Mbps via the SRL pin. It offers configurable half-duplex or full-duplex modes through the H/F pin. Fail-safe circuitry ensures a logic-high receiver output when inputs are open or shorted. The component includes thermal shutdown protection and independent phase control for both transmitter and receiver.

Feature Summary

• Configurable communication mode allows selection between half-duplex and full-duplex operation using a dedicated selector pin.
• Programmable slew-rate limiting enables adjustment of transmission speeds to minimize electromagnetic interference and signal reflections.
• Independent phase inversion pins allow correction of reversed twisted-pair line connections without hardware changes.
• Integrated fail-safe circuitry guarantees a defined logic-high state at the receiver output during bus idle or fault conditions.

Applications

• RS-422 and RS-485 serial communication networks
• Industrial control local area networks
• EMI-sensitive applications requiring controlled signal rise times
• Level translation interfaces

Procurement Notes

Verify the specific suffix 'ESD' corresponds to the -40°C to +85°C industrial temperature range and SOIC-14 packaging configuration. Confirm that the '+T' designation indicates tape-and-reel shipping format rather than tube packaging. Ensure compatibility with the required voltage levels and interface standards before finalizing procurement orders.

Selection Notes

Select this component when flexible data rate and duplex mode configurations are required within a single package. It is suitable for designs needing adjustable slew rates to balance speed against EMI constraints. Verify that the system requires a single +5V supply and benefits from the high input impedance allowing extensive bus loading capabilities.

Part Context

This part belongs to the MAX3080–MAX3089 family of high-speed transceivers designed for RS-485/RS-422 communication. Unlike fixed-function variants in the series, the MAX3089 provides programmable parameters for data rate and duplex mode. It shares the common fail-safe and low-power characteristics of the family while offering enhanced configurability for complex network topologies.

Replacement Considerations

Direct pin-compatible replacements include other members of the MAX308x family such as the MAX3086E or MAX3083E, provided their fixed data rates and duplex modes align with the design requirements. Verify that any substitute maintains the same 14-SOIC footprint and +5V operating voltage specifications.