+5V, Fail-Safe, 40Mbps, PROFIBUS RS-485/RS-422 Transceivers

5V, Fail-Safe, 40Mbps PROFIBUS RS-485/RS-422 Transceivers

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The MAX3465-MAX3469 are high-speed differential bus transceivers for RS-485 and RS-422 communications. They are designed to meet TIA/EIA-422-B, TIA/EIA-485-A, V.11, and X.27 standards. The transceiver complies with the PROFIBUS specification providing +2.1V minimum output level with a 54Ω load, 40Mbps data rate, and output skew less than 2ns. Each part contains one three-state differential line driver and one differential input line receiver. The devices operate from a +5V supply and feature true fail-safe circuitry, which guarantees a logic-high receiver output when the receiver inputs are open or shorted. This enables all receiver outputs on a terminated bus to output logic highs when all transmitters are disabled.

All devices feature a 1/4-standard-unit load receiver input impedance that allows 128 transceivers on the bus. Driver and receiver propagation delays are guaranteed under 20ns for multidrop, clock distribution applications. Drivers are short-circuit current limited and are protected against excessive power dissipation by thermal-shutdown circuitry. The driver and receiver feature active-high and active-low enables, respectively, that can be connected together externally to serve as a direction control.
MAX3465, MAX3466, MAX3467, MAX3468, MAX3469: Pin Configurations and Typical Operating Circuit MAX3465, MAX3466, MAX3467, MAX3468, MAX3469: Pin Configurations and Typical Operating Circuit Enlarge+

Key Features

  • Recommended for PROFIBUS Applications
  • Up to 40Mbps Data Rate
  • 15ns Transmitter Propagation Delay
  • 20ns Receiver Propagation Delay
  • 2ns Transmitter and Receiver Skew
  • High Differential Driver Output Level (2.1V on 54Ω)
  • Hot-Swap Versions
  • 1µA Shutdown Supply Current
  • Low Supply Current Requirements (2.5mA, typ)
  • Allow Up to 128 Transceivers on the Bus
  • True Fail-Safe Receiver while Maintaining EIA/TIA-485 Compatibility
  • Designed for Multipoint Transmissions on Long or Noisy Bus Lines
  • Full-Duplex and Half-Duplex Versions Available
  • Phase Controls to Correct for Twisted-Pair Reversal for 14-Pin Versions
  • Current-Limiting and Thermal Shutdown for Driver Overload Protection


  • High-Speed RS-422 Communications
  • High-Speed RS-485 Communications
  • Industrial-Control Local Area Networks
  • Level Translators
  • PROFIBUS Applications
Part NumberTx/RxDuplexVSUPPLY
Data Rate
Tx ENRx ENICC (Shutdn.)
Rx/Tx on BusRx Failsafe w/ InputsSlew Rate LimitingOper. Temp.
typmintypSee Notes
MAX3465 1Tx + 1RxFull52.530000YesYes1128Open or ShortedNo
-40 to +85
0 to +70
SOIC (N)/14
$2.26 @1k
MAX3466 FullYesYes1
SOIC (N)/14
$2.26 @1k
MAX3467 FullNoNo-
SOIC (N)/8
$1.81 @1k
MAX3468 HalfYesYes1
SOIC (N)/8
$1.84 @1k
MAX3469 HalfYesYes1
SOIC (N)/8
$1.62 @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 3884 How Far and How Fast Can You Go with RS-485?

Quality and Environmental Data

Product Reliability Reports: MAX3469.pdf 
Lead-Free Package Tin (Sn) Whisker Reports

CAD Symbols and Footprints

  • MAX3469CSA+
  • MAX3469ESA+
  • MAX3469ESA+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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