Four-Channel, 5kVRMS Digital Isolators

Industry's Fastest and Most Flexible Digital Isolator Allow Direct Interfacing to Low Voltage (1.8V) Devices

Please check latest availability status for a specific part variant.


The MAX14934–MAX14936 are a family of four-channel, 5kVRMS digital isolators utilizing Maxim’s proprietary process technology. For applications requiring 2.75kVRMS of isolation, see the MAX14930–MAX14932. The MAX14934–MAX14936 family transfers digital signals between circuits with different power domains at ambient temperatures up to +125°C.

The MAX14934–MAX14936 family offers all three possible unidirectional channel configurations to accommodate any four-channel design, including SPI, RS-232, RS-485, and large digital IO modules. For applications requiring bidirectional channels, such as I²C, refer to the MAX14937.

Devices are available with data rates from DC up to 1Mbps, 25Mbps, or 150Mbps. Each device is also available in either a default high or default low configuration. The default is the state an output goes to when its input is unpowered. See the Ordering Information/Selector Guide in the data sheet for the suffixes associated with each option.

Independent 1.71V to 5.5V supplies on each side of the isolator also make the devices suitable for use as level translators.

The MAX14934–MAX14936 are available in a 16-pin wide body (10.3mm x 7.5mm) SOIC package. All devices are rated for operation at ambient temperatures of -40°C to +125°C.
MAX14934, MAX14935, MAX14936: Functional Diagram MAX14934, MAX14935, MAX14936: Functional Diagram Enlarge+

Key Features

  • Robust Galvanic Isolation of Digital Signals
    • Withstands 5kVRMS for 60s (VISO)
    • Continuously Withstands 848VRMS (VIOWM)
    • 1200VP Repetitive Peak Voltage (VIORM)
    • Withstands ±10kV Surge per IEC 61000-4-5
  • Interfaces Directly with Most Micros and FPGAs
    • Accepts 1.71V to 5.5V Supplies
  • Many Options Support Broad Applications
    • 3 Data Rates (1Mbps, 25Mbps, 150Mbps)
    • 3 Channel Direction Configuration
    • 2 Output Default States (High or Low)
  • Low Power Consumption at High Data Rates
    • At 1.8V:
      • 2.5mA per Channel Typical at 1Mbps
      • 5.25mA per Channel Typical at 100Mbps
    • At 3.3V:
      • 2.6mA per Channel Typical at 1Mbps
      • 7.1mA per Channel Typical at 100Mbps


  • Battery Management
  • Fieldbus Communications for Industrial Automation
  • General Multichannel Isolation Applications
  • Isolated SPI, RS-232, RS-485/RS-422
  • Medical Systems
Part NumberChannelsUni-directional InputsUni-directional InputsUni-directional Data Rate
Insulation RatingUni-directional Propagation
Oper. Temp.
Side ASide BmaxmaxminmaxSee Notes
MAX14934A 44-15000VRMS551.715.5-40 to +125
MAX14934B 4-2529
MAX14934C 4-1508
MAX14934D 4-155
MAX14934E 4-2529
$2.79 @1k
MAX14934F 4-1508
$3.29 @1k
MAX14935A 31155
MAX14935B 312529
$2.79 @1k
MAX14935C 311508
$3.29 @1k
MAX14935D 31155
MAX14935E 312529
$2.79 @1k
MAX14935F 311508
$3.29 @1k
MAX14936A 22155
$2.39 @1k
MAX14936B 222529
$2.79 @1k
MAX14936C 221508
MAX14936D 22155
$2.39 @1k
MAX14936E 222529
$2.79 @1k
MAX14936F 221508
$3.29 @1k
See All Digital Isolators (74)
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.

MAX1493XSEVKIT: Evaluation Kit for the MAX14130/MAX14131/MAX14930/MAX14931/MAX14932/MAX14934/MAX14935 and MAX14936
MAX1493XWEVKIT: Evaluation Kit for the MAX14130/MAX14131/MAX14930/MAX14931/MAX14932/MAX14934/MAX14935 and MAX14936

Technical Documents

App Note 5993 Understanding the Safety Certification of Digital Isolators

Quality and Environmental Data

Product Reliability Reports: MAX14934.pdf 
Lead-Free Package Tin (Sn) Whisker Reports

Additional Resources

Don’t Worry – Isolate All Those Digital Signals

Tools & Models

  • MAX14934-6 IBIS Model
  • CAD Symbols and Footprints

  • MAX14934AAWE+
  • MAX14934AAWE+T
  • MAX14934BAWE+
  • MAX14934BAWE+T
  • MAX14934CAWE+
  • MAX14934CAWE+T
  • MAX14934DAWE+
  • MAX14934DAWE+T
  • MAX14934EAWE+
  • MAX14934EAWE+T
  • MAX14934FAWE+
  • MAX14934FAWE+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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