1.6µA, RS-485/RS-422, Half Duplex, Differential Transceiver for Battery-Powered Systems

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The MAX3471 half-duplex transceiver is intended for lithium battery-powered RS-485/RS-422 applications. It draws only 1.6µA (typical) supply current from a 3.6V supply with the receiver enabled and the driver disabled. Its wide 2.5V to 5.5V supply voltage guarantees operation over the lifetime of a lithium battery.

This device features true fail-safe operation that guarantees a logic-high receiver output when the receiver inputs are open or shorted. This means that the receiver output will be a logic high if all transmitters on a terminated bus are disabled (high impedance). The MAX3471 has a 1/8-unit load input resistance. When driver outputs are enabled and pulled above VCC or below GND, internal circuitry prevents battery back-charging.

The MAX3471 is available in an 8-pin µMAX package.

MAX3471: Typical Application Circuit MAX3471: Typical Application Circuit Enlarge+

Key Features

  • 1.6µA Supply Current with Receiver Enabled
  • +2.5V to +5.5V Single-Supply Operation
  • True Fail-Safe Receiver Input
  • Available in µMAX Package
  • 1/8-Unit-Load Receiver Input
  • -7V to +10V Common-Mode Input Voltage Range


  • Battery-Powered Differential Communications
  • Level Translators
  • Remote Meter Reading
Part NumberTx/RxDuplexVSUPPLY
Data Rate
Tx ENRx ENRx/Tx on BusRx Failsafe w/ InputsSlew Rate LimitingOper. Temp.
typminSee Notes
MAX3471 1Tx + 1RxHalf2.5 to 5.50.001664YesYes256Open or ShortedNo
-40 to +85
0 to +70
$1.97 @1k
See All RS-485/RS-422 Line Driver/Receivers (204)
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.

CAD Symbols and Footprints

  • MAX3471CUA+
  • MAX3471CUA+T
  • MAX3471EUA+
  • MAX3471EUA+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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