MAX3082CSA

Overview

The MAX3082CSA+ is a half-duplex RS-485/RS-422 transceiver in an 8-pin SOIC package. 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 features fail-safe circuitry ensuring a logic-high receiver output when inputs are open or shorted. The receiver input impedance is 1/8-unit-load, allowing up to 256 transceivers on the bus.

Feature Summary

• Slew-rate-limited driver outputs reduce electromagnetic interference and signal reflections for reliable communication at lower speeds.
• Fail-safe receiver design guarantees a high logic state if the differential input voltage falls below -200mV or remains within the undefined region.
• High-impedance receiver inputs allow extensive network topologies by supporting up to 256 unit loads on a single bus line.

Applications

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

Procurement Notes

Verify the specific suffix 'CSA+' against the manufacturer's ordering guide to confirm the commercial temperature range and lead-free packaging status. Ensure the selected variant matches the required operating environment and regulatory compliance standards for the target deployment.

Selection Notes

Select this component for half-duplex applications requiring error-free transmission up to 115kbps. The integrated slew-rate limiting makes it suitable for long cable runs where signal integrity is critical. Verify that the system power supply remains within the specified 4.75V to 5.25V range for optimal performance.

Part Context

This part belongs to the MAX3080–MAX3089 family of high-speed transceivers. While sharing the same core architecture and pinout compatibility with industry-standard devices like the 75180, this specific model is optimized for half-duplex operation with controlled driver edge rates.

Replacement Considerations

The datasheet notes pin-compatibility with the 75180. Designers should verify that any substitute device maintains the same 1/8-unit-load receiver impedance and fail-safe threshold characteristics to ensure bus compatibility.