MAX3074EASA+

Overview

The MAX3074EASA+ is a full-duplex RS-485/RS-422 transceiver manufactured by Analog Devices Inc./Maxim Integrated. It features one driver and one receiver operating on a single 3V to 3.6V supply voltage. The device supports data transmission rates up to 500kbps with slew-rate-limited drivers. It includes fail-safe circuitry that guarantees a logic-high receiver output when inputs are open or shorted, and hot-swap capability for safe bus insertion. The component operates within an extended temperature range of -40°C to +125°C and is housed in an 8-SOIC surface-mount package.

Feature Summary

• Fail-safe receiver circuitry ensures a logic-high output during input disconnection or short-circuit conditions.
• Hot-swap input structure prevents false transitions and erroneous data transfer during power-up or live bus insertion.
• Slew-rate-limited drivers minimize electromagnetic interference (EMI) and reduce signal reflections on improperly terminated cables.

Applications

• Industrial control systems
• Telecommunications equipment
• Security systems
• Lighting systems

Procurement Notes

Verify the specific ordering suffix against official documentation to confirm package type and temperature rating. Confirm RoHS compliance status as indicated in the manufacturer's datasheet. Ensure the supplier provides valid traceability documents matching the Analog Devices Inc./Maxim Integrated part number.

Selection Notes

Select this component for applications requiring full-duplex communication over RS-485 or RS-422 networks. It is suitable for environments where hot-swap functionality and robust ESD protection are required. Verify that the system supply voltage falls within the 3V to 3.6V range and that the 500kbps maximum data rate meets the application requirements.

Part Context

This device belongs to the MAX3070E–MAX3079E family of high-speed transceivers designed for RS-485/RS-422 communication. The family offers various configurations including half-duplex options and different data rate capabilities ranging from 250kbps to 16Mbps depending on the specific model and slew-rate settings.

Replacement Considerations

Compatible substitutes within the same family include the MAX3070EASA+, MAX3073EASA+, and MAX3076EASA+. These parts share similar pinouts and core functionalities but may differ in duplex mode or maximum data rate specifications.

FAQ

What is the function of the fail-safe feature in the MAX3074EASA+?

The fail-safe circuitry guarantees a logic-high receiver output if the receiver inputs are open, shorted, or connected to a terminated bus with all transmitters disabled.

How does the hot-swap capability benefit the MAX3074EASA+?

It eliminates false transitions on the bus during power-up or hot insertion by holding the driver and receiver enable pins in defined states until the supply voltage stabilizes.

What is the maximum data rate supported by the MAX3074EASA+?

The MAX3074EASA+ supports transmit speeds up to 500kbps due to its slew-rate-limited driver design.