MAX3074EASA+T

Overview

The MAX3074EASA+T is a full-duplex RS-485 transceiver manufactured by Analog Devices Inc./Maxim Integrated. It features one driver and one receiver operating on a single 3V to 3.6V supply. The device supports data rates up to 500kbps with slew-rate-limited drivers. It includes ±15kV 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 temperatures range from -40°C to +125°C in an 8-SOIC package.

Feature Summary

• Hot-swap input structure on DE and RE pins eliminates false transitions during power-up or hot insertion
• True fail-safe receiver guarantees a logic-high output when receiver inputs are open or shorted while maintaining EIA/TIA-485 compatibility
• Enhanced slew-rate limiting facilitates error-free data transmission up to 500kbps

Applications

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

Procurement Notes

Verify the specific suffix 'T' indicates tape-and-reel packaging rather than tube. Confirm the 'E' designation corresponds to the industrial temperature range of -40°C to +125°C. Ensure the '+'' signifies compliance with current environmental standards. Cross-reference the manufacturer part number with official distributor catalogs to confirm availability and authenticity before procurement.

Selection Notes

Select this component for full-duplex RS-485 applications requiring data rates up to 500kbps. It is suitable for environments needing robust ESD protection and fail-safe operation. Note that unlike other family members, this specific model lacks a shutdown mode, resulting in higher quiescent current. Verify that the 8-SOIC package fits the board layout constraints.

Part Context

This device belongs to the MAX3070E–MAX3079E series of +3.3V RS-485 transceivers. Within this family, the MAX3074E is specifically designated for full-duplex communication with a maximum data rate of 500kbps. It shares common features like hot-swap inputs and fail-safe receivers with siblings such as the MAX3070E and MAX3073E, but differs in duplex mode and speed capabilities compared to half-duplex variants.

Replacement Considerations

Direct functional substitutes within the same family include the MAX3070EASA+T (250kbps) and MAX3073EASA+T (500kbps). For higher speeds, the MAX3076EASA+T (16Mbps) is available. All share the same pinout and package, though electrical characteristics vary.