±15kV ESD-Protected 52Mbps, 3V to 5.5V, SOT23 RS-485/RS-422 True Fail-Safe Receivers

Industry's First RS-485/RS-422 SOT Receivers

Please check latest availability status for a specific part variant.


The MAX3280E/MAX3281E/MAX3283E/MAX3284E are single receivers designed for RS-485 and RS-422 communication. These devices guarantee data rates up to 52Mbps, even with a 3V power supply. Excellent propagation delay (15ns max) and package-to-package skew time (8ns max) make these devices ideal for multidrop clock distribution applications.

The MAX3280E/MAX3281E/MAX3283E/MAX3284E have true fail-safe circuitry, which guarantees a logic-high receiver output when the receiver inputs are opened or shorted. The receiver output will be a logic high if all transmitters on a terminated bus are disabled (high impedance). These devices feature 1/4-unit-load receiver input impedance, allowing up to 128 receivers on the same bus.

The MAX3280E is a single receiver available in a 5-pin SOT23 package. The MAX3281E/MAX3283E single receivers have a receiver enable (EN or active-low EN) function and are offered in a 6-pin SOT23 package. The MAX3284E features a voltage logic pin that allows compatibility with low-voltage logic levels, as in digital FPGAs/ASICs. On the MAX3284E, the voltage threshold for a logic high is user-defined by setting VL in the range from 1.65V to VCC. The MAX3284E is also offered in a 6-pin SOT23 package.
MAX3280E, MAX3281E, MAX3283E, MAX3284E: Typical Operating Circuit MAX3280E, MAX3281E, MAX3283E, MAX3284E: Typical Operating Circuit Enlarge+

Key Features

  • ESD Protection:
    • ±15kV-Human Body Model
    • ±6kV-IEC 1000-4-2, Contact Discharge
    • ±12kV-IEC 1000-4-2, Air-Gap Discharge
  • Guaranteed 52Mbps Data Rate
  • Guaranteed 15ns Receiver Propagation Delay
  • Guaranteed 2ns Receiver Skew
  • Guaranteed 8ns Package-to-Package Skew Time
  • VL Pin for Connection to FPGAs/ASICs
  • Allow Up to 128 Transceivers on the Bus (1/4-unit-load)
  • Tiny SOT23 Package
  • True Fail-Safe Receiver
  • -7V to +12V Common-Mode Range
  • 3V to 5.5V Power-Supply Range
  • Enable (High and Low) Pins for Redundant Operation
  • Three-State Output Stage (MAX3281E/MAX3283E)
  • Thermal Protection Against Output Short Circuit
  • AEC-Q100 (MAX3280EAUK/V+ Only)


  • Automotive
  • Base Stations
  • Clock Distribution
  • Industrial Control
  • Local Area Networks
  • Telecom Racks
Part NumberTx/RxVSUPPLY
Data Rate
ESD Protect.
Tx ENRx ENRx/Tx on BusRx Failsafe w/ InputsSlew Rate LimitingOper. Temp.
typminSee Notes
MAX3280E 1Rx
3.0 to 5.5
95200015NoNo128Open or ShortedNo-40 to +125
$0.65 @1k
MAX3281E Yes
$0.63 @1k
MAX3283E Yes
$0.64 @1k
MAX3284E No
$0.63 @1k
See All RS-485/RS-422 Line Driver/Receivers (205)
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 6009 Detect a Differential Signal Even When the Inputs Are Stuck
App Note 4223 The Evolution of the RS-232 Transceivers

Quality and Environmental Data

Product Reliability Reports: MAX3280E.pdf 
Lead-Free Package Tin (Sn) Whisker Reports

Tools & Models

  • MAX3280E IBIS Model
  • CAD Symbols and Footprints

  • MAX3280EAUK+
  • MAX3280EAUK+T
  • MAX3280EAUK/V+
  • MAX3280EAUK/V+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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