MAX3081ESA+T

Overview

The MAX3081ESA+T is a full-duplex RS-422/RS-485 transceiver manufactured by Analog Devices Inc./Maxim Integrated. It integrates one driver and one receiver within an 8-pin SOIC package. The device supports data transmission rates up to 115kbps with slew-rate-limited drivers to minimize electromagnetic interference. It operates on a single +5V supply, typically drawing 375µA of quiescent current. The component features fail-safe circuitry that ensures a logic-high receiver output when inputs are open or shorted. It provides a 1/8-unit-load receiver input impedance, allowing up to 256 transceivers on the bus.

Feature Summary

• Fail-safe circuitry guarantees a logic-high receiver output when receiver inputs are open or shorted.
• Slew-rate-limited drivers minimize electromagnetic interference and reduce reflections from improperly terminated cables.
• 1/8-unit-load receiver input impedance enables connection of up to 256 transceivers on a single communication line.

Applications

• RS-422/RS-485 communications
• Level translators
• Transceivers for EMI-sensitive applications
• Industrial-control local area networks

Procurement Notes

Verify the specific ordering suffix against official documentation to confirm package type and temperature range. Confirm RoHS compliance status through manufacturer datasheets or environmental files. Ensure the component matches the required full-duplex configuration and interface protocol before integration into the design.

Selection Notes

Select this component for full-duplex RS-422 or RS-485 applications requiring reduced electromagnetic emissions. The MAX3081 is suitable for systems where data rates do not exceed 115kbps. Consider the 1/8-unit-load capability for high-node-count networks. Verify that the operating voltage aligns with the system's +5V supply requirements.

Part Context

The MAX3081 belongs to the MAX3080–MAX3089 family of high-speed transceivers designed for RS-485 and RS-422 communication standards. This series includes variants supporting different duplex modes and data rates. The MAX3081 specifically addresses full-duplex needs with limited slew rates, distinguishing it from higher-speed non-limited variants in the same product line.

Replacement Considerations

The MAX3081 is pin-compatible with industry-standard devices like the 75176. When substituting, verify that the replacement part maintains the full-duplex architecture and 115kbps slew-rate limitation. Ensure the alternative component supports the required +5V supply voltage and industrial temperature range specifications.