±15kV ESD-Protected, ±60V Fault-Protected, 10Mbps, Fail-Safe RS-485/J1708 Transceivers

±15kV ESD-Protected, ±60V, Fault-Protected, 10Mbps Fail-Safe RS-485/J1708 Transceivers

Please check latest availability status for a specific part variant.


The MAX3440E-MAX3444E fault-protected RS-485 and J1708 transceivers feature ±60V protection from signal faults on communication bus lines. Each device contains one differential line driver with three-state output and one differential line receiver with three-state input. The 1/4-unit-load receiver input impedance allows up to 128 transceivers on a single bus. The devices operate from a 5V supply at data rates of up to 10Mbps. True fail-safe inputs guarantee a logic-high receiver output when the receiver inputs are open, shorted, or connected to an idle data line.

Hot-swap circuitry eliminates false transitions on the data bus during circuit initialization or connection to a live backplane. Short-circuit current-limiting and thermal shutdown circuitry protect the driver against excessive power dissipation, and on-chip ±15kV ESD protection eliminates costly external protection devices.

The MAX3440E-MAX3444E are available in 8-pin SO and PDIP packages and are specified over industrial and automotive temperature ranges.
MAX3440E, MAX3441E: Pin Configurations and Typical Operating Circuits MAX3440E, MAX3441E: Pin Configurations and Typical Operating Circuits Enlarge+

Key Features

  • ±15kV ESD Protection
  • ±60V Fault Protection
  • Guaranteed 10Mbps Data Rate (MAX3441E/MAX3443E)
  • Hot Swappable for Telecom Applications
  • True Fail-Safe Receiver Inputs
  • Enhanced Slew-Rate-Limiting Facilitates Error-Free Data Transmission (MAX3440E/MAX3442E/MAX3444E)
  • Allow Up to 128 Transceivers on the Bus
  • -7V to +12V Common-Mode Input Range
  • Automotive Temperature Range (-40°C to +125°C)
  • Industry-Standard Pinout


  • HVAC Controls
  • Industrial Networks
  • RS-422/RS-485 Communications
  • Telecommunication Systems
Part NumberTx/RxDuplexVSUPPLY
Fault Protect.
Data Rate
ESD Protect.
Tx ENRx ENICC (Shutdn.)
Rx/Tx on BusRx Failsafe w/ InputsSlew Rate LimitingOper. Temp.
typmintypSee Notes
MAX3440E 1Tx + 1RxHalf5603025015YesYes-128Open or ShortedNo
-40 to +85
-40 to +125
SOIC (N)/8
$3.18 @1k
MAX3441E 1010000-
-40 to +85
-40 to +125
SOIC (N)/8
$3.18 @1k
MAX3442E 3025010
-40 to +85
-40 to +125
SOIC (N)/8
$3.18 @1k
MAX3443E 101000010
-40 to +85
-40 to +125
0 to +70
SOIC (N)/8
$2.77 @1k
MAX3444E 3025010
-40 to +85
-40 to +125
SOIC (N)/8
$3.18 @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.

Tools & Models

  • MAX3444E IBIS Model
  • 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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