6-Channel, Low-Power, 3.75kVRMS SPI Digital Isolator

High Density, Low Power, Digital Isolator

Please check latest availability status for a specific part variant.


The MAX14483 is a 6-channel, 3.75kVRMS digital galvanic isolator using Maxim’s proprietary process technology. The six signal channels are individually optimized for SPI applications and include very low propagation delay on the SDI, SDO, and SCLK channels. The SDO channel’s tri-state control is enabled by the active-low CS input as well as a second enable control input pin active-low SDOEN, allowing a single MAX14483 to isolate multiple SPI devices. To simplify system design, an open drain active-low FAULT output can be wire ORed with error outputs from other devices. In addition, an auxiliary channel (AUX) is available for passing timing or control signals from the master side to the slave side and power monitors (SAA, SBA) are provided for both power domains to signal if the opposite side of the isolator is ready for operation. Independent 1.71V to 5.5V supplies on each side of the isolator also make the device suitable for use as a level translator.

The MAX14483 has an isolation rating of 3.75kVRMS for 60 seconds and is available in a 20-pin SSOP package with 5.5mm of creepage and clearance. The package material has a minimum comparative tracking index (CTI) of 400V, which gives it a group II rating in creepage tables.

The MAX14483 is rated for operation at ambient temperatures of -40°C to +125°C.

MAX14483: Functional Diagram MAX14483: Functional Diagram Enlarge+

Key Features

  • Saves Space and Components
    • 6 Isolated Channels in a 20-SSOP Package
  • Low Propagation Delay on SCLK, SDI, and SDO
    • Up to 100MHz Clock, 200Mbps Data Rate
    • 10ns Typical Propagation Delay
    • 2ns Maximum Pulse Width Distortion
    • 250ps Typical Peak Jitter
  • Robust Galvanic Isolation of Digital Signals
    • Withstands 3.75kVRMS for 60s (VISO)
    • Continuously Withstands 450VRMS (VIOWM)
    • Withstands ±10kV Surge between GNDA and GNDB with 1.2/50μs Waveform
    • High CMTI (50kV/μs, Typical)
  • Flexible System Design
    • Wide 1.71V to 5.5V Voltage Range on Each Side
    • Active-Low SDOEN Control Pin for Sharing Isolators
    • Open-Drain Active-Low FAULT Channel for Shared Interrupt on Master Side
    • Auxiliary Channel for Timing or Control
  • Low Power Consumption
    • 1.53mW per Channel at SCLK = 10MHz with VDD = 3.3V
    • 0.77mW per Channel at SCLK = 10MHz with VDD = 1.8V


  • Building Automation
  • General SPI-bus Isolation
  • Industrial Automation
  • Process Automation
  • Programmable Logic Controllers
  • Robotics

See parametric specs for Digital Isolators (74)

Part NumberChannelsUni-directional InputsUni-directional InputsUni-directional Data Rate
Insulation RatingUni-directional Propagation
Oper. Temp.
Side ASide BmaxmaxminmaxSee Notes
MAX14483 6352003750VRMS131.715.5-40 to +125
$3.13 @1k

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.

MAX14483EVKIT: Evaluation Kit for the MAX14483
USB2GPIOISO: Evaluation Kit for the MAX14483
Request Reliability Report for: MAX14483 
Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C   Material Composition  

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 >


Related Resources