±15kV ESD-Protected, 1Mbps, 1µA RS-232 Transmitters in SOT23-6

Industry's First ±15kV ESD-Protected RS-232 Transmitters in a SOT Package

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The MAX3188E/MAX3189E single RS-232 transmitters in a SOT23-6 package are for space- and cost-constrained applications requiring minimal RS-232 communications. These devices consume only 150µA of supply current from ±4.5V to ±6V supplies. They feature a shutdown input that reduces current consumption to only 1µA and forces the transmitter output into a high-impedance state. RS-232 data transmission is guaranteed up to 250kbps with the MAX3188E and up to 1Mbps with the MAX3189E.

The MAX3188E/MAX3189E are EIA/TIA-232 transmitters that convert CMOS/TTL logic levels to RS-232-compliant signals. The transmitter output is protected to ±15kV using the IEC 1000-4-2 Air-Gap Discharge method, to ±8kV using the IEC 1000-4-2 Contact Discharge method, and to ±15kV per the Human Body Model, ensuring strict compliance with international standards. The MAX3188E/MAX3189E transmitters have a standard inverting output.
MAX3188E, MAX3189E: Typical Operating Circuit MAX3188E, MAX3189E: Typical Operating Circuit Enlarge+

Key Features

  • Small 6-Pin SOT23 Package
  • ESD-Protected RS-232 Output
    • ±15kV per Human Body Model
    • ±8kV per IEC 1000-4-2, Contact Discharge
    • ±15kV per IEC 1000-4-2, Air-Gap Discharge
  • 150µA Operating Supply Current
  • Shutdown Reduces Supply Current to 1µA
  • Guaranteed Data Rate
    • 1Mbps (MAX3189E)
    • 250kbps (MAX3188E)
  • Three-State RS-232 Transmitter Output
  • No External Components


  • Diagnostic Ports
  • Digital Still Cameras
  • Handheld Equipment
  • Network Equipment
  • Set-Top Boxes
  • Telecommunications
Part NumberVSUPPLY (Dual)
TxRxData Rate
Internal Charge PumpExt. CapsESD Protect.
DualmintypSee Notes
MAX3188E 5102500.144No015
$0.97 @1k
MAX3189E 1000
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

Tutorial 2141 Determining Clock Accuracy Requirements for UART Communications

Quality and Environmental Data

Product Reliability Reports: MAX3188E.pdf 
Lead-Free Package Tin (Sn) Whisker Reports
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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