MAX6366HKA26+

Overview

The MAX6366HKA26+ is a supervisory circuit manufactured by Analog Devices Inc./Maxim Integrated, designed for monitoring single voltage rails. It operates within a supply voltage range of 1.02V to 5.5V and features a fixed reset threshold of 2.63V. The device provides an active-low open-drain or open-collector reset output with a minimum reset timeout of 140ms. It supports manual reset functionality via an MR pin and operates across an industrial temperature range of -40°C to +85°C. Packaged in an SOT-23-8 surface-mount case, it ensures reliable system protection.

Feature Summary

• Provides precise voltage supervision with a fixed 2.63V threshold for critical power rails
• Features manual reset capability through a dedicated MR input pin for controlled system recovery
• Delivers an active-low reset signal with guaranteed minimum timeout duration to prevent premature restarts

Applications

• Embedded systems requiring stable power management
• Microcontroller unit (MCU) reset circuits
• Portable electronic devices with battery backup monitoring
• Industrial control systems operating in harsh environments

Procurement Notes

Verify the exact suffix designation when sourcing replacements, as variations may indicate different thresholds or packaging. Confirm current lifecycle status, as older Maxim parts may be discontinued or subject to limited availability. Ensure compatibility with existing PCB footprints, specifically the SOT-23-8 package dimensions. Cross-reference electrical specifications against the official datasheet to validate threshold accuracy and operating temperature ranges before integration into production designs.

Selection Notes

Select this component when a fixed 2.63V supervision threshold is required for single-rail monitoring applications. Consider the active-low output polarity and open-drain configuration for interface compatibility with downstream logic. Evaluate the manual reset feature if system-level control over reset events is necessary. Verify that the SOT-23-8 package fits the available board space and thermal requirements. Compare against other MAX6366 variants to ensure the specific voltage threshold matches the target application's needs.

Part Context

The MAX6366 series comprises supervisory circuits designed for monitoring power supplies in embedded systems. Manufactured by Maxim Integrated, now part of Analog Devices, these devices offer various threshold options and package styles. The HKA26 variant specifically targets applications needing a 2.63V reset point. This family is known for low quiescent current and robust performance in industrial and consumer electronics, providing reliable reset signals to protect microcontrollers and memory devices from brown-out conditions.

Replacement Considerations

Direct substitutes include other MAX6366 variants with similar thresholds, such as the MAX6366HKA29+, though threshold differences must be verified. Check for equivalent packages like SOT-23-8 from compatible manufacturers. Ensure replacement parts maintain the same reset polarity and timeout characteristics to avoid system instability.