MAX3082ESA+T

Overview

The MAX3082ESA+T is a half-duplex RS-485/RS-422 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, drawing a typical quiescent current of 375µA. Key electrical parameters include a receiver input resistance of 96kΩ (1/8-unit load), allowing up to 256 devices on the bus. The unit features fail-safe circuitry that guarantees a logic-high receiver output when inputs are open or shorted.

Feature Summary

• Fail-safe circuitry ensures a logic-high receiver output during idle or fault conditions
• Slew-rate-limited drivers reduce electromagnetic interference and signal reflections
• 1/8-unit-load receiver impedance enables high node density on communication buses

Applications

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

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm the specific suffix matches the required temperature range and packaging format. Check for RoHS compliance status as indicated in official documentation. Ensure the part number corresponds to the exact pinout and functional specifications required for the design.

Selection Notes

Select this component for half-duplex RS-485 or RS-422 applications requiring low-speed data transmission up to 115kbps. The integrated slew-rate limiting makes it suitable for environments sensitive to electromagnetic interference. Verify that the system voltage aligns with the specified +5V operating range and that the thermal requirements fit the intended application environment.

Part Context

This device belongs to the MAX3080–MAX3089 family of high-speed transceivers designed for RS-485/RS-422 communication standards. The family includes variants supporting different duplex modes and data rates. The MAX3082 specifically addresses half-duplex requirements with reduced slew rates, distinguishing it from full-duplex counterparts like the MAX3080 or higher-speed models like the MAX3086.

Replacement Considerations

Pin-compatible alternatives within the same family include the MAX3085 and MAX3088, which share the same 8-pin configuration but support higher data rates of 500kbps and 10Mbps respectively. Verify that the increased speed capabilities do not introduce unwanted EMI if the original design relied on the MAX3082's specific slew-rate limitations.