MAX3078EASA+

Overview

The MAX3078EASA+ is a half-duplex RS-485 transceiver manufactured by Analog Devices Inc./Maxim Integrated. It operates on a single 3.3V supply and supports data rates up to 16Mbps with unrestricted driver slew rates. The device features ±15kV Human Body Model ESD protection, fail-safe circuitry ensuring a logic-high receiver output when inputs are open or shorted, and hot-swap capability to prevent false transitions during power-up. It includes one driver and one receiver in an 8-pin SOIC package.

Feature Summary

• Hot-swap input structure on DE and RE pins eliminates false transitions during bus insertion or power-up
• Fail-safe receiver guarantees a logic-high output when inputs are open, shorted, or all transmitters are disabled
• Unrestricted driver slew rate enables high-speed data transmission up to 16Mbps
• ±15kV Human Body Model ESD protection on I/O pins ensures robust performance

Applications

• Industrial Control
• Lighting Systems
• Telecom
• Security Systems
• Instrumentation

Procurement Notes

Verify the exact part number against official manufacturer documentation before procurement. Confirm that the suffix 'A' indicates the extended temperature range (-40°C to +125°C) and 'SA' denotes the SOIC package. Ensure compliance with RoHS directives as indicated by the '+' suffix. Cross-reference with authorized distributors to confirm current availability and authenticity.

Selection Notes

Select the MAX3078EASA+ for applications requiring half-duplex RS-485 communication at speeds up to 16Mbps. This component is suitable where unrestricted slew rates are necessary for high-speed data integrity. It is appropriate for designs needing integrated fail-safe and hot-swap protection without external components. Consider the 8-pin SOIC package constraints for PCB layout.

Part Context

The MAX3078EASA+ belongs to the MAX3070E–MAX3079E family of +3.3V, ±15kV ESD-protected, fail-safe, hot-swap RS-485 transceivers. Within this series, it is specifically designated for half-duplex operation with high-speed capabilities. Other members of the family offer varying data rates, full-duplex modes, or programmable slew rates.

Replacement Considerations

Compatible substitutes within the same family include the MAX3076E (full-duplex, 16Mbps) and MAX3077E (full-duplex, 16Mbps). For half-duplex alternatives with lower data rates, consider the MAX3072E (250kbps) or MAX3075E (500kbps). Verify pin compatibility and electrical specifications before substitution.