±15kV ESD-Protected, EMC Compliant, 230kbps RS-232 Serial Port for Modems

Please check latest availability status for a specific part variant.


The MAX3186 is a complete DCE RS-232 serial port designed to meet the stringent ESD requirements of the European community. All transmitter outputs and receiver inputs are protected to ±15kV using IEC 1000-4-2 Air-Gap Discharge, ±8kV using IEC 1000-4-2 Contact Discharge, and ±15kV using the Human Body Model.

The MAX3186 has five RS-232 transmitters, three RS-232 receivers, and no charge pump, optimizing it for operation in modem applications. It is guaranteed to run at data rates up to 230kbps, providing compatibility with popular software for communicating with personal computers. Power-supply current is less than 300µA for IDD and ISS, and less than 1mA for ICC.

The MAX3186 is available in an SO package and in the tiny SSOP that further reduces board space.
MAX3186: Typical Operating Circuit MAX3186: Typical Operating Circuit Enlarge+

Key Features

  • Enhanced ESD Protection:
    • ±15kV—Human Body Model
    • ±8kV—IEC 1000-4-2, Contact Discharge
    • ±15kV—IEC 1000-4-2, Air-Gap Discharge
  • Latchup Free During an ESD Event
  • 20-Pin SSOP or SO Packages
  • Guaranteed 230kbps Data Rate
  • Flow-Through Pinout
  • Complete DCE Serial Port


  • Equipment Meeting IEC 1000-4-2
  • Instruments
  • ISDN Modems
  • Modems
Part NumberVSUPPLY
TxRxData Rate
Internal Charge PumpExt. CapsESD Protect.
mintypSee Notes
SOIC (W)/20
$2.25 @1k
See All RS-232 Line Driver/Receivers (136)
Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

Technical Documents

App Note 836 Selecting and using RS-232 Interface Parts for Your Power Supply Voltages

Quality and Environmental Data

Request Reliability Report for: MAX3186 
Lead-Free Package Tin (Sn) Whisker Reports

CAD Symbols and Footprints

  • MAX3186CAP+
  • MAX3186CAP+T
  • MAX3186CWP+
  • MAX3186CWP+T
  • MAX3186EAP+
  • MAX3186EAP+T
  • Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C  

    Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

    Quality Management System >
    Environmental Management System >


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