460kbps, 1µA Supply Current, RS-232-Compatible Transceivers in µMAX

Save Board Space with a ±15kV ESD-Protected RS-232 Transceiver in a uMAX Package

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The MAX3311/MAX3313 are low-power, +5V EIA/TIA-232-compatible transceivers. Both devices have one transmitter and one receiver. The transceivers have a proprietary low-dropout transmitter output stage enabling RS-232-compatible operation from a +5V supply with a single inverting charge pump. These devices require only three 0.1µF capacitors and will run at data rates up to 460kbps while maintaining RS-232-compatible output levels.

The MAX3311 features a 1µA shutdown mode. In shutdown the device turns off the charge pump, pulls V- to ground, and the transmitter output is disabled. The MAX3313 features an active-low INVALID output that asserts high when an active RS-232 cable signal is connected, signaling to the host that a peripheral is connected to the communication port.
MAX3311, MAX3313: Typical Operating Circuit MAX3311, MAX3313: Typical Operating Circuit Enlarge+

Key Features

  • 1µA Low-Power Shutdown (MAX3311)
  • Active-low INVALID Output (MAX3313)
  • Receiver Active in Shutdown (MAX3311)
  • Single Transceiver (1Tx/1Rx) in 10-Pin µMAX
  • RS-232-Compatible Operation


  • Cell Phones
  • Digital Still Cameras
  • Digital Television (Receivers, Set-Top Boxes)
  • Global Positioning Systems (GPS)
  • Modems
  • Pagers
  • Pen Entry Palmtops
  • Point-of-Sale Terminals
Part NumberVSUPPLY
TxRxData Rate
Internal Charge PumpExt. CapsCap. Value
Rx Active in ShutdnPackage/PinsBudgetary
mintypnomSee Notes
MAX3311 5114600.1Yes20.11
$1.47 @1k
MAX3313 0
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.

Quality and Environmental Data

Product Reliability Reports: MAX3311.pdf 
Lead-Free Package Tin (Sn) Whisker Reports

CAD Symbols and Footprints

  • MAX3311CUB
  • MAX3311CUB+
  • MAX3311CUB+T
  • MAX3311CUB-T
  • MAX3311ECUB+
  • MAX3311ECUB+T
  • MAX3311EEUB+
  • MAX3311EEUB+T
  • MAX3311EUB
  • MAX3311EUB+
  • MAX3311EUB+T
  • MAX3311EUB-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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