MAX3089EESD+T

Overview

The MAX3089EESD+T is a ±15kV ESD-protected, fail-safe RS-485/RS-422 transceiver in a 14-pin SO package. It contains one driver and one receiver with selectable half/full-duplex operation via the H/F pin. The device supports data rates up to 10Mbps, configurable via the SRL pin (115kbps open, 500kbps VCC, 10Mbps GND). Independent phase inversion for transmitter (TXP) and receiver (RXP) corrects twisted-pair reversals. Quiescent current is typically 375µA at +5V. Operating temperature range is -40°C to +85°C.

Feature Summary

• Pin-selectable full or half-duplex communication modes
• Programmable slew-rate limiting for error-free transmission across multiple baud rates
• Independent phase control pins to compensate for reversed twisted-pair wiring
• Enhanced ±15kV electrostatic discharge protection on all I/O pins

Applications

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

Procurement Notes

Verify the specific suffix 'ESD+' against the manufacturer's official ordering guide to confirm compliance with lead-free and RoHS directives. Ensure the tape-and-reel packaging matches automated assembly requirements. Cross-reference the date code and lot number with the distributor's certificate of analysis to validate component authenticity and storage history prior to integration.

Selection Notes

Select this component when design flexibility for duplex mode and data rate is required within a single package. The MAX3089E allows field configuration of transmission speed and direction without hardware changes. Verify that the system bus topology supports the 1/8-unit load impedance allowing up to 256 nodes. Confirm that the +5V supply voltage aligns with the system power architecture.

Part Context

This device belongs to the MAX3080E–MAX3089E family of high-speed transceivers. Unlike fixed-function variants, the MAX3089E integrates programmability features such as selectable duplex operation and adjustable slew rates. It maintains pin compatibility with industry-standard parts like the 75180 while adding enhanced configuration capabilities through dedicated selector pins.

Replacement Considerations

Direct functional substitutes include other members of the MAX3080E–MAX3089E series. For fixed-rate applications, consider the MAX3086E for 10Mbps or MAX3083E for 500kbps. If half-duplex only is needed, the MAX3085E is compatible. Verify pinout alignment and electrical characteristics before substitution.