MAX3072EASA+

Overview

The MAX3072EASA+ is a half-duplex RS-485 transceiver operating from a single +3.3V supply. It features one driver and one receiver with a maximum data rate of 250kbps. The device includes ±15kV ESD protection on I/O pins, fail-safe circuitry ensuring a logic-high output when inputs are open or shorted, and hot-swap capability to prevent false transitions during power-up. It operates within an extended temperature range of -40°C to +125°C and draws 800μA of supply current when unloaded.

Feature Summary

• Slew-rate-limited drivers minimize electromagnetic interference (EMI) and reduce reflections caused by improperly terminated cables.
• Hot-swap input structure on DE and RE pins eliminates false transitions on the bus during power-up or hot insertion.
• True fail-safe receiver guarantees a logic-high output when receiver inputs are open, shorted, or connected to a terminated bus with all transmitters disabled.

Applications

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

Procurement Notes

Verify the specific suffix 'EASA+' against the manufacturer's official datasheet to confirm the package type, temperature grade, and lead-free status. Ensure that the ordering information matches the exact part number requirements for your design specifications.

Selection Notes

Select this component for applications requiring robust ESD protection and reliable communication over twisted-pair lines. The slew-rate limiting makes it suitable for environments where signal integrity is critical at lower data rates. Verify compatibility with the system's voltage levels and interface requirements.

Part Context

This device belongs to the MAX3070E–MAX3079E family of +3.3V, ±15kV ESD-protected, fail-safe, hot-swap RS-485 transceivers. The MAX3072E variant specifically supports half-duplex communication with reduced slew-rate drivers optimized for error-free data transmission up to 250kbps.

Replacement Considerations

Direct functional substitutes within the same family include the MAX3072EEPA+ (DIP-8 package). Other variants like MAX3075E offer similar performance but may differ in package or specific electrical characteristics.

FAQ

What is the purpose of the fail-safe feature in the MAX3072E?

The fail-safe feature guarantees a logic-high receiver output when the receiver inputs are open, shorted, or connected to a terminated transmission line with all transmitters disabled, ensuring a known state during idle conditions.

How does the hot-swap capability benefit the MAX3072E?

The hot-swap capability prevents false transitions on the bus during power-up or hot insertion by holding the driver enable (DE) low and receiver enable (RE) high until the power supply stabilizes, avoiding erroneous data transfer.

Why are slew-rate-limited drivers used in the MAX3072E?

Reduced slew-rate drivers minimize electromagnetic interference (EMI) and reduce reflections caused by improperly terminated cables, allowing for error-free data transmission at speeds up to 250kbps.