Features and Benefits

  • Protection for Robust Performance
    • ±15kV Human Body Model ESD on I/O Pins
    • True Fail-Safe Receiver While Maintaining EIA/TIA-485 Compatibility
    • Enhanced Slew-Rate-Limiting Facilitates Error-Free Data Transmission (MAX3070E-MAX3075E/MAX3079E)
    • Hot-Swap Input Structure on DE and Active-Low RE
  • Flexible Feature Set for Ease of Design
    • Pin-Selectable Full/Half-Duplex Operation (MAX3079E)
    • Phase Controls to Correct for Twisted-Pair Reversal (MAX3079E)
    • Allows up to 256 Transceivers on the Bus
    • Available in Industry-Standard SO and DIP packages
  • 10µA Shutdown Current Mode for Power Savings (Except MAX3071E/MAX3074E/MAX3077E)

Product Details

The MAX3070E–MAX3079E 3.3V, ±15kV ESD-protected, RS-485/RS-422 transceivers feature one driver and one receiver. These devices include fail-safe circuitry, guaranteeing a logic-high receiver output when receiver inputs are open or shorted. The receiver outputs a logic high if all transmitters on a terminated bus are disabled (high impedance). The MAX3070E–MAX3079E include a hot-swap capability to eliminate false transitions on the bus during power-up or hot insertion.

The MAX3070E/MAX3071E/MAX3072E feature reduced slew-rate drivers that minimize EMI and reduce reflections caused by improperly terminated cables, allowing error-free data transmission up to 250kbps. The MAX3073E/MAX3074E/MAX3075E also feature slew-rate-limited drivers but allow transmit speeds up to 500kbps. The MAX3076E/MAX3077E/MAX3078E driver slew rates are not limited, making transmit speeds up to 16Mbps possible. The MAX3079E slew rate is pin selectable for 250kbps, 500kbps, and 16Mbps.

The MAX3072E/MAX3075E/MAX3078E are intended for half-duplex communications, and the MAX3070E/MAX3071E/MAX3073E/MAX3074E/MAX3076E/MAX3077E are intended for full-duplex communications. The MAX3079E is selectable for half-duplex or full-duplex operation. It also features independently programmable receiver and transmitter output phase through separate pins.

The MAX3070E-MAX3079E transceivers draw 800µA of supply current when unloaded or when fully loaded with the drivers disabled. All devices have a 1/8-unit load receiver input impedance, allowing up to 256 transceivers on the bus.


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

Product Lifecycle icon-recommended Production

At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.

Product Recommendations

MAX3076E Companion Parts

Recommended Related Parts

Design Resources

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well.  "Zero defects" for shipped products is always our goal.

PCN-PDN Information

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