MAX3082ESA

Overview

The MAX3082ESA is a half-duplex RS-485/RS-422 transceiver featuring one driver and one receiver. It supports data rates up to 115kbps with slew-rate-limited drivers to minimize EMI. The device operates on a single +5V supply (4.75V to 5.25V) and draws 375µA quiescent current. It includes fail-safe circuitry guaranteeing a logic-high output when inputs are open or shorted, and offers ±15kV ESD protection. The component is housed in an 8-pin SOIC package.

Feature Summary

• Slew-rate-limited drivers reduce electromagnetic interference and signal reflections for error-free transmission at lower speeds.
• Fail-safe receiver circuitry ensures a defined high logic state during bus idle conditions or input disconnection.
• High noise immunity provided by 1/8-unit-load receiver input impedance allowing extensive network expansion.

Applications

• RS-422 and RS-485 communication networks
• Industrial control local area networks
• EMI-sensitive applications requiring reduced signal ringing

Procurement Notes

Verify the specific suffix 'ESA' against official documentation to confirm the industrial temperature range (-40°C to +85°C) and SOIC-8 package type. Ensure compatibility with system voltage levels and interface requirements before integration.

Selection Notes

Select this component for half-duplex applications requiring robust noise immunity and low power consumption. It is suitable for systems where minimizing electromagnetic emissions is critical due to its controlled slew rate capabilities.

Part Context

This part belongs to the MAX3080–MAX3089 family of high-speed transceivers. While sharing core features like fail-safe operation and ESD protection, it differs from other family members primarily through its half-duplex configuration and specific 115kbps slew-rate limitation.

Replacement Considerations

The datasheet indicates pin-compatible alternatives within the same series, such as the MAX3085 and MAX3088, which offer different speed capabilities while maintaining similar form factors.

FAQ

How does the MAX3082 handle open or shorted receiver inputs?

It utilizes fail-safe circuitry that guarantees a logic-high receiver output whenever the differential inputs are open, shorted, or connected to a terminated line with all drivers disabled.

What is the maximum number of transceivers supported on a single bus?

Due to the 1/8-unit-load receiver input impedance, up to 256 transceivers can be connected in parallel on one communication line.