MAX3075EASA+

Overview

The MAX3075EASA+ is a half-duplex RS-485 transceiver manufactured by Analog Devices Inc./Maxim Integrated. It operates on a single +3.3V supply and features one driver and one receiver in an 8-pin SOIC package. The device supports data rates up to 500kbps with slew-rate-limited drivers. Key specifications include ±15kV Human Body Model ESD protection, fail-safe circuitry ensuring a logic-high output when inputs are open or shorted, and hot-swap capability for the DE and RE pins. Operating temperature range is -40°C to +125°C.

Feature Summary

• Integrated fail-safe circuitry guarantees a logic-high receiver output when inputs are open or shorted.
• Hot-swap input structure on DE and RE pins eliminates false transitions during bus insertion.
• Slew-rate-limited drivers minimize electromagnetic interference (EMI) and reduce signal reflections.
• Provides ±15kV ESD protection on I/O pins for robust performance in harsh environments.

Applications

• Industrial Control Systems
• Telecommunications Equipment
• Security Systems
• Lighting Systems
• Instrumentation

Procurement Notes

Verify the specific ordering suffix 'A' indicates the extended industrial temperature range (-40°C to +125°C) compared to the 'E' variant (-40°C to +85°C). Confirm the 'PA+' suffix denotes lead-free packaging compliant with RoHS standards. Ensure the manufacturer source is Analog Devices or Maxim Integrated to guarantee component authenticity and traceability.

Selection Notes

Select the MAX3075EASA+ for applications requiring half-duplex communication at speeds up to 500kbps. This model is distinct from full-duplex variants like the MAX3074E. It is suitable for systems needing enhanced noise immunity via slew-rate limiting and robust protection against ESD and bus contention without requiring external components for fail-safe operation.

Part Context

The MAX3075EASA+ belongs to the MAX3070E–MAX3079E family of +3.3V RS-485 transceivers. Within this series, it is specifically designated as a half-duplex device with a guaranteed maximum data rate of 500kbps. It shares common features such as thermal shutdown and 1/8-unit load receiver impedance with other members of the family, allowing up to 256 transceivers on a single bus.

Replacement Considerations

The MAX3075EESA+ serves as a surface-mount alternative within the same functional family. For full-duplex requirements, the MAX3074EASA+ is a compatible interface IC but differs in duplex mode. Verify pin compatibility and temperature ratings when substituting with other MAX307x series devices.