MAX3071EASA+T

Overview

The MAX3071EASA+T is a full-duplex RS-485 transceiver from the MAX3070E–MAX3079E family, manufactured by Analog Devices Inc./Maxim Integrated. It operates on a single +6V maximum supply voltage with typical operation at 3.3V ±10%. The device features one driver and one receiver, providing fail-safe circuitry that guarantees a logic-high receiver output when inputs are open or shorted. It includes hot-swap capability to eliminate false transitions during power-up or insertion. The driver supports data rates up to 250kbps with reduced slew rates to minimize EMI. ESD protection is rated at ±15kV Human Body Model on I/O pins. The component is housed in an 8-pin SOIC package and operates within a temperature range of -40°C to +125°C.

Feature Summary

• Fail-safe receiver circuitry ensures a logic-high output when receiver inputs are open, shorted, or connected to a terminated bus with all drivers disabled.
• Hot-swap input structure on DE and RE pins prevents erroneous data transfer during board insertion into powered backplanes.
• Reduced slew-rate driver minimizes electromagnetic interference (EMI) and reflections caused by improperly terminated cables.
• ±15kV Human Body Model ESD protection on I/O pins enhances robustness in noisy industrial environments.

Applications

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

Procurement Notes

Verify the specific suffix 'A' indicates the extended temperature range (-40°C to +125°C) compared to the 'E' variant (-40°C to +85°C). Confirm the '+T' designation corresponds to the reel packaging format required for surface-mount assembly. Ensure the ordering code matches the exact pinout and electrical specifications defined in the official MAX3070E–MAX3079E datasheet to avoid compatibility issues with existing designs.

Selection Notes

Select this component for full-duplex RS-485 applications requiring error-free transmission up to 250kbps with minimized EMI. It is suitable for systems needing hot-swap functionality and fail-safe behavior without shutdown mode support, as the MAX3071E lacks the 10µA shutdown current feature found in other family members. Consider the 1/8-unit load receiver impedance which allows up to 256 transceivers on the bus.

Part Context

The MAX3071E is part of the broader MAX3070E–MAX3079E series of +3.3V, ±15kV ESD-protected, fail-safe, hot-swap RS-485 transceivers. Within this family, it is specifically designated for full-duplex communication with a fixed 250kbps maximum data rate due to its slew-rate-limited driver. It shares common interface standards and protection features with siblings like the MAX3070E and MAX3073E but differs in duplex mode and speed capabilities.

Replacement Considerations

Public confirmed substitute part numbers: MAX3070EASA+, MAX3073EASA+. These devices share the same package, full-duplex configuration, and core electrical characteristics, though they may differ in temperature grade or specific slew-rate limitations.