Features and Benefits

  • Small Solution
    • 2.35V to 5.50V Operating Supply Voltage
    • Only One External Component Required
    • 125µA Operating Current
  • High Precision
    • Selectable 102.5% to 110% OV Monitors
    • Selectable 97.5% to 90% UV Monitors
    • ±0.8% Accuracy
    • 0.5% Step Size
    • ASIL D Compliance
  • Highly Integrated
    • MAX20478A - Two Voltage Monitoring Inputs
    • MAX20478B - Three Voltage Monitoring Inputs
    • Windowed Watchdog
    • OTP Configuration with Error-Correcting Code
    • Programmable RESET1 and RESET2 Pins
  • 10-Pin Side-Wettable TDFN with Exposed Pad (3mm x 3mm)
  • AEC-Q100 Qualified
  • -40°C to +125°C Operating Temperature

Product Details

The MAX20478 is a complete ASIL D-compliant System-on-a-Chip (SoC) voltage monitor with two or three voltage monitor inputs. Inputs 1 and 2 can be configured to monitor a voltage between 0.5V and 3.6875V in 12.5mV steps, while input 3 can be configured to monitor a voltage between 0.5V to 5.6V in 20mV steps. Each input has programmable OV/UV thresholds of between 2.5% and 10% with ±0.8% accuracy. The MAX20478 also contains a programmable windowed watchdog.

The MAX20478 significantly reduces system size and component count, while improving reliability, compared to separate ICs or discrete components. The device is designed to operate over the ambient temperature range of -40°C to +125°C.


  • Advanced Driver-Assistance Systems
  • Autonomous Driving Processing Systems
  • Power System Supervision and Microcontroller Unit/System-on-a-Chip Monitoring
  • Remote Sensor Modules
Complete documentation is available upon completion of a Non-Disclosure Agreement (NDA). To request an NDA, click here.

Product Lifecycle icon-recommended Recommended for New Designs

This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.

Evaluation Kits (1)

Reference Designs (1)

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ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well.  "Zero defects" for shipped products is always our goal.

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Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.