±15kV ESD-Protected, ±80V Fault-Protected, Fail-Safe RS-485/J1708 Transceivers

Simplifies Design and Reduces Board Space by Eliminating External Components Required for Overvoltage Protection Up to ±80V, Such as TVSs and PTCs

Please check latest availability status for a specific part variant.


The MAX13442E/MAX13444E are fault-protected RS-485 and J1708 transceivers that feature ±80V protection from signal faults on communication bus lines. The MAX13442E/MAX13444E feature a reduced slew-rate driver that minimizes EMI and reflections, allowing error-free transmission up to 250kbps. The MAX13443E driver can transmit up to 10Mbps. The high-speed MAX13443E RS-485 tranceiver features ±60V protection from signal faults on communication bus lines. These transceivers feature foldback current limit. 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. 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 MAX13442E/MAX13443E/MAX13444E are available in an 8-pin SO package and are specified over the automotive temperature range.
MAX13442E, MAX13443E, MAX13444E: Pin Configurations and Typical Operating Circuits MAX13442E, MAX13443E, MAX13444E: Pin Configurations and Typical Operating Circuits Enlarge+

Key Features

  • ±15kV ESD Protection
  • ±80V Fault Protection (±60V MAX13443E)
  • Guaranteed 10Mbps Data Rate (MAX13443E)
  • Hot-Swappable for Telecom Applications
  • True Fail-Safe Receiver Inputs
  • Enhanced Slew-Rate-Limiting Facilitates Error-Free Data Transmission (MAX13442E/MAX13444E)
  • Allow Up to 128 Transceivers on the Bus
  • -7V to +12V Common-Mode Input Range
  • ±6mA FoldBack Current Limit
  • Industry-Standard Pinout


  • Automotive Applications
  • HVAC Controls
  • Industrial Networks
  • RS-422/RS-485 Communications
  • Telecommunications Systems
  • Truck and Trailer Applications
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
MAX13442E 1Tx + 1RxHalf5801625015YesYes0.001128Open or ShortedYes-40 to +125
SOIC (N)/8
$3.18 @1k
MAX13443E 60510000
SOIC (N)/8
MAX13444E 8010250
SOIC (N)/8
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.

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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