Six-Channel Digital Isolator

Industry's First Monolithic 600VRMS Digital Isolator

Please check latest availability status for a specific part variant.


The MAX14851 is a six-channel digital isolator utilizing Maxim’s proprietary process technology, whose monolithic design provides a compact and low-cost transfer of digital signals between circuits with different power domains. The technology enables low power consumption and high channel density.

The four unidirectional channels are each capable of DC to 50Mbps, with two of the four channels passing data across the isolation barrier in each direction. The two bidirectional channels are open-drain, each capable of data rates from DC to 2Mbps.

Independent 3.0V to 5.5V supplies on each side of the isolator also make it suitable for use as a level translator. The MAX14851 can be used for isolating SPI buses, I2C buses, RS-232, RS-485/RS-422 buses, and general-purpose isolation. When used as a bus isolator, extra channels are available for power monitoring and reset signals.

The MAX14851 is available in a 16-pin QSOP (3.9mm x 4.94mm) package. The device is specified over the -40°C to +125°C temperature range.

The MAX14851 is a functional replacement for the MAX14850, and shares the same pin configurations as the MAX14850.

MAX14851: Functional Diagram MAX14851: Functional Diagram Enlarge+

Key Features

  • Complete Digital Isolation Solution
    • 600VRMS Isolation for 60 Seconds
    • Short-Circuit Protection on Unidirectional Outputs
    • 200VRMS Working Isolation Voltage
    • Four Unidirectional Signal Paths: 2-In/2-Out
    • Two Bidirectional Open-Drain Signal Paths
    • 50Mbps (max) Unidirectional Data Rate
    • 2Mbps (max) Bidirectional Data Rate
  • Compatible with Many Interface Standards
    • I2C
    • SPI
    • RS-232, RS-485/RS-422
    • SMBus, PMBus Interfaces


  • Battery Management
  • Industrial Control Systems
  • Isolated I2C, SPI, RS-232/422/485 Interfaces
  • Medical Systems
  • Telecommunication Systems
Part NumberChannelsUni-directional InputsUni-directional InputsBi-directional ChannelsUni-directional Data Rate
Bi-directional Data Rate
Insulation RatingUni-directional Propagation
Bi-directional Propagation
Oper. Temp.
Side ASide BmaxmaxmaxmaxminmaxSee Notes
MAX14851 6222502600VRMS1318935.5-40 to +125
SOIC (N)/16
$1.86 @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.

MAX14851EVKIT: Evaluation Kit for the MAX14851

Quality and Environmental Data

Request Reliability Report for: MAX14851 
Lead-Free Package Tin (Sn) Whisker Reports

Tools & Models

  • MAX14851 IBIS Model
  • CAD Symbols and Footprints

  • MAX14851AEE+
  • MAX14851AEE+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.

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