MAX9940AXK+T

Overview

The MAX9940AXK+T is a signal-line overvoltage protector designed for low-voltage devices, manufactured by Analog Devices Inc./Maxim Integrated. It operates from a single supply voltage ranging from +2.2V to +5.5V and consumes only 13µA of quiescent supply current. The device features an EXT port protected up to 28V and offers extended ESD protection with ±4kV IEC 61000-4 contact on the EXT pin. It provides a fast fault reaction time of 60ns and is available in a small 5-pin SC70 package. The component supports an automotive temperature range from -40°C to +125°C.

Feature Summary

• Provides signal-line overvoltage protection for low-voltage applications
• Features 28V protection on the EXT port with extended ESD protection capabilities
• Delivers fast 60ns fault reaction time for rapid response
• Operates within an automotive temperature range of -40°C to +125°C

Applications

• Notebook Computers
• Portable Devices

Procurement Notes

Verify availability status as distribution channels may indicate limited supply or discontinuation. Confirm RoHS compliance details through official documentation. Ensure the specific suffix matches required packaging options such as reel or cut tape. Cross-reference ordering information with manufacturer datasheets to validate part authenticity and specifications before procurement.

Selection Notes

Select this component for applications requiring compact overvoltage protection in portable electronics. The low quiescent current makes it suitable for battery-powered systems. Verify that the input voltage range aligns with system requirements. Consider the SC70-5 package size for space-constrained designs. Ensure compatibility with the intended operating temperature environment.

Part Context

The MAX9940 belongs to the MAX9940 series of power monitors and regulators. It is categorized under Current & Power Monitors & Regulators within the PMIC family. The device is designed to protect signal lines in low-voltage environments, offering a specialized solution distinct from general-purpose comparators or amplifiers in the Maxim portfolio.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.