Features and Benefits

  • Easy Configuration of RS-422 and RS-485 Networks Up to 20Mbps (max) Data Rate
    • Software/Pin-Selectable 100Ω/120Ω Termination
    • Integrated, Switchable Resistors Eliminate the Need for External Resistors or DIP Switches
    • Driver Drives 100Ω Double Termination and Supports Cat-5/Cat-6 and 24-AWG Cables
    • Pin-Selectable Slew-Rate Limiting Reduces EMI for Data Rates Up to 500kbps
    • 1/8 Unit Load Allows Up to 256 Transceivers On the Bus
  • Designed to Perform in Harsh Environments
    • Extended ESD Protection
      • ±30kV Human Body Model
      • ±15kV Air Gap Discharge per IEC 61000-4-2
      • ±7kV Contact Discharge per IEC 61000-4-2
    • Inverting of A, B Line Polarity (MAX13451E) Allows Phase Reversal if Misconnected
    • Thermal and Overcurrent Protection
    • Driver Fault Indication (MAX13451E)
    • Fail-Safe Receivers
    • -40°C to +125°C Temperature Range
    • +4.5V to +5.5V Supply Voltage Range
  • Integrated Low-Voltage Logic Interface (Down to 1.8V) Interfaces with Small-Geometry ASICs and FPGA

Product Details

The MAX13450E/MAX13451E are half-duplex and full-duplex RS-485/RS-422 transceivers. These devices feature internal 100Ω and 120Ω termination resistors. The resistor values are pin selectable. A logic supply input allows interfacing to logic levels down to +1.8V.

The MAX13450E/MAX13451E feature strong drivers specified to drive low-impedance lines found when a fully loaded bus, based on today's 100Ω characteristic impedance cable, is doubly terminated. Both devices allow slew-rate limiting of the driver output to reduce EMI and reflections for data rates up to 500kbps.

The MAX13451E has a FAULT alarm indication output to signal to the system that an error condition exists in the driver. The MAX13451E also features a logic inversion function. The logic inversion allows phase reversal of the A-B signals in case these are inadvertently connected wrongly.

The MAX13450E/MAX13451E have 1/8-unit load receiver input impedance, allowing up to 256 transceivers on the bus. All driver outputs are protected to ±30kV ESD using the Human Body Model (HBM).

The MAX13450E/MAX13451E are available in a 14-pin TSSOP package and operate over the automotive -40°C to +125°C temperature range.


  • Industrial Control Systems
  • Medical Networks
  • Motor Control
  • Portable Industrial Equipment
  • Security Networks

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.

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.

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