3V, ±15kV ESD-Protected, AutoShutdown Plus RS-232 Transceiver for PDAs and Cell Phones

Separate Logic Supplies Ensure Compatibility with Mixed ASIC Logic Levels

Please check latest availability status for a specific part variant.


The MAX3387E 3V powered EIA/TIA-232 and V.28/V.24 is a communications interface with low power requirements, high data-rate capabilities, and enhanced electrostatic discharge (ESD) protection. The MAX3387E has three receivers and three transmitters. All RS-232 inputs and outputs are protected to ±15kV using the IEC 1000-4-2 Air-Gap Discharge method, ±8kV using the IEC 1000-4-2 Contact Discharge method, and ±15kV using the Human Body Model.

A proprietary low-dropout transmitter output stage enables true RS-232 performance from a +3.0V to +5.5V supply with a dual charge pump. The charge pump requires only four small 0.1µF capacitors for operation from a +3.3V supply. The MAX3387E is capable of running at data rates up to 250kbps while maintaining RS-232 compliant output levels.

The MAX3387E has a unique VL pin that allows interoperation in mixed-logic voltage systems. Both input and output logic levels are pin programmable through the VL pin. The MAX3387E is available in a space-saving TSSOP package.
MAX3387E: Typical Operating Circuit MAX3387E: Typical Operating Circuit Enlarge+

Key Features

  • VL Pin for Compatibility with Mixed-Voltage Systems
  • ±15kV ESD Protection on Rx Inputs and Tx Outputs
  • Low 300µA Supply Current
  • Guaranteed 250kbps Data Rate
  • 1µA AutoShutdown Plus™ with Receivers Active
  • Meets EIA/TIA-232 Specifications Down to 3.0V


  • Battery-Powered Applications
  • Cellular Data Cables
  • Handheld Equipment
  • PDAs and PDA Cradles
  • Peripherals
  • Subnotebook and Palmtop Computers
Part NumberVSUPPLY
TxRxData Rate
Internal Charge PumpExt. CapsCap. Value
ESD Protect.
Rx Active in ShutdnPackage/PinsBudgetary
mintypnomSee Notes
$4.01 @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.

Tools & Models

  • MAX3387E IBIS Model
  • CAD Symbols and Footprints

  • MAX3387ECUG+
  • MAX3387ECUG+T
  • MAX3387EEUG+
  • MAX3387EEUG+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.

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