MAX3085ECSA

Overview

The MAX3085ECSA is a half-duplex RS-422/RS-485 transceiver manufactured by Analog Devices Inc./Maxim Integrated. It integrates one driver and one receiver in an SOIC-8 surface-mount package. The device operates at data rates up to 10Mbps with slew-rate limiting to reduce electromagnetic interference. It supports a supply voltage range of 4.75V to 5.25V and draws 600µA of quiescent current. The component provides ±15kV electrostatic discharge protection on the bus pins and features fail-safe circuitry that ensures a high logic state when inputs are open. It functions within an industrial temperature range of -40°C to +85°C.

Feature Summary

• Integrated ±15kV ESD protection on A, B, and I/O pins for enhanced robustness
• Fail-safe receiver design guarantees a high logic output if differential inputs are open
• Slew-rate-limited driver reduces signal overshoot and minimizes radiated emissions

Applications

• Industrial automation networks requiring reliable RS-485 communication
• Building automation systems with long-distance bus requirements
• Metering applications involving multi-drop serial data transmission

Procurement Notes

Verify the specific suffix against official manufacturer documentation to confirm exact packaging and environmental compliance status. Confirm the operating temperature grade matches the intended application environment. Ensure the pinout configuration aligns with the target PCB layout before finalizing procurement orders.

Selection Notes

Select this component for designs requiring high-speed data transfer up to 10Mbps alongside strong noise immunity. The integrated slew-rate limiting makes it suitable for applications sensitive to electromagnetic interference. 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 MAX3080E–MAX3089E family of high-speed RS-485/RS-422 transceivers. These devices share common architectural features including fail-safe receivers and robust ESD protection. The family offers various speed and power consumption options while maintaining compatibility with standard RS-485 and RS-422 protocols.

Replacement Considerations

Publicly confirmed substitute part numbers include MAX3085ESA+ and MAX3085EESA+. Verify pin compatibility and electrical specifications before substitution.