MAX6861UK225+

Supervisors Overview

The MAX6861UK225+ is a nanopower microprocessor supervisory circuit manufactured by Analog Devices Inc./Maxim Integrated. It features a manual reset input and an integrated watchdog timer for system reliability. The device operates within a supply voltage range of 1.2V to 5.5V and includes a programmable timeout period. It provides a push-pull/totem pole output configuration with active-low reset assertion. The component is housed in a compact SOT-23-5 surface-mount package, suitable for space-constrained portable applications.

Supervisors Feature Summary

• Integrates a manual reset button interface for user-initiated system recovery
• Includes a built-in watchdog timer to detect software malfunctions
• Operates at ultra-low supply voltages starting from 1.2V
• Provides active-low reset output with configurable timeout duration

Supervisors Applications

• Portable battery-powered consumer electronics requiring low quiescent current
• Embedded systems needing watchdog protection against code execution errors
• Microprocessor-based designs requiring manual reset capability
• Industrial control units operating in harsh environments

Supervisors Procurement Notes

Verify the exact suffix (+T or +) matches your reel or tube requirements. Confirm RoHS compliance status as per the latest manufacturer documentation. Check for obsolescence notices since some variants may be discontinued. Ensure the SOT-23-5 footprint aligns with your PCB layout. Validate the specific threshold voltage (2.235V) meets your system's power rail monitoring needs before finalizing procurement.

Supervisors Selection Notes

Select this component when a combination of manual reset and automatic watchdog functionality is required in a minimal footprint. Consider the 1.2V minimum operating voltage for compatibility with low-voltage logic families. Evaluate the need for the specific 2.235V threshold against your system's brown-out detection requirements. Compare quiescent current specifications if battery life is critical. Ensure the active-low reset polarity matches your microprocessor's reset input logic.

Supervisors Part Context

This part belongs to the MAX6861 series of nanopower supervisory circuits designed for microprocessor systems. It complements other Maxim Integrated supervisors by offering both watchdog and manual reset features in a single small package. The series supports various voltage thresholds and timeout periods to accommodate different application requirements across portable and industrial markets.

Supervisors Replacement Considerations

Check for direct pin-compatible alternatives within the MAX686x family that offer similar threshold voltages. Verify if newer generations from Analog Devices provide improved performance or availability. Ensure any substitute maintains the SOT-23-5 package and active-low reset output characteristics.