Features and Benefits

  • ±80V Fault Protection
  • ±12kV ESD Protection
  • +3.3V Operation
  • Internal Slew-Rate Limiting
  • 250kbps Data Rate
  • Allows Up to 128 Transceivers on the Bus
  • -7V to +12V Common-Mode Input Voltage Range
  • True Fail-Safe Inputs
  • Hot-Swap Input Structure on DE
  • Available in 8-Pin SO and PDIP Packages

Product Details

The MAX3430 fault-protected RS-485 transceiver features ±80V protection from overvoltage signal faults on communication bus lines. Each device contains one driver and one receiver, and the output pins can withstand faults, with respect to ground, of up to ±80V. Even if the faults occur when the transceiver is active, shut down, or powered off, the device will not be damaged. The MAX3430 operates from a 3.3V supply and features a slew-rate-limited driver that minimizes EMI and reduces reflections caused by improperly terminated cables, allowing error-free data transmission at data rates up to 250kbps. The MAX3430 has a 1/4-unit-load receiver input impedance allowing up to 128 transceivers on a single bus and features fail-safe circuitry, which guarantees a logic-high receiver output when the receiver inputs are open.

Hot-swap circuitry eliminates false transitions on the data cable during circuit initialization or connection to a live backplane. Short-circuit current limiting and thermal- shutdown circuitry protect the driver against excessive power dissipation.

The MAX3430 is available in 8-pin SO and 8-pin PDIP packages, and is specified over commercial and industrial temperature ranges.


  • Industrial Control Local Area Networks
  • Lighting Systems
  • Multimaster RS-485 Networks
  • PROFIBUS Applications
  • RS-422/RS-485 Communications

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.

PCN-PDN Information

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