MAX20478AATBA/VY+

Supervisors Overview

The MAX20478AATBA/VY+ is an ASIL-D qualified, 2-3 channel power system monitor from Analog Devices. It operates within a supply voltage range of 2.35V to 5.50V and features multiple voltage monitoring inputs. The device includes integrated watchdog timer functionality and provides reset outputs with threshold voltages ranging from 500mV to 3.6875V. Designed for automotive applications, it meets AEC-Q100 standards and functions reliably across an operating temperature range of -40°C to +125°C.

Supervisors Feature Summary

• ASIL-D functional safety qualification for critical automotive power systems
• Integrated watchdog timer for system reliability monitoring
• Multiple independent voltage monitoring channels with configurable thresholds

Supervisors Applications

• Automotive engine control units requiring ASIL-D compliance
• Multi-rail power distribution monitoring in vehicle electronics
• Safety-critical supervisory circuits in ADAS hardware

Supervisors Procurement Notes

Verify the specific suffix VY+ against official Analog Devices documentation to confirm package type and tape/reel specifications. Confirm ASIL-D certification status through the manufacturer's functional safety manual. Ensure the ordering part number matches the exact pinout and thermal pad requirements for your PCB layout. Check for any recent lifecycle notices regarding obsolescence or alternative recommendations directly from the supplier.

Supervisors Selection Notes

Select this component when ASIL-D compliance is mandatory for the power monitoring function. Compare input channel count requirements against the available monitoring pins. Evaluate the reset threshold voltage range against the specific rails being monitored. Consider the TDFN-10 package size constraints relative to the available board space and thermal dissipation needs.

Supervisors Part Context

This part belongs to the MAX20479 family of power system monitors, designed specifically for high-reliability automotive environments. It shares architectural similarities with other ASIL-D supervisors but offers distinct channel configurations and threshold options tailored for complex multi-voltage architectures found in modern electric and hybrid vehicles.

Supervisors Replacement Considerations

Consult the official Analog Devices cross-reference guide for verified substitutes. Ensure any replacement maintains ASIL-D certification and compatible pinout if direct substitution is required.