MAX6365LKA44+

Overview

The MAX6365LKA44+ is a low-power voltage supervisory circuit manufactured by Analog Devices Inc. (Maxim Integrated). It operates within a supply voltage range of 1.2V to 5.5V and features a fixed threshold voltage of 4.38V for monitoring single inputs. The device provides an active-low, push-pull output and includes manual reset functionality with a typical reset delay time of 280ms. It incorporates a battery backup switch and chip-enable gating for power management flexibility. Designed for surface-mount installation in SOT-23-8 packages, it supports an operating temperature range from -40°C to +85°C while consuming only 15µA of quiescent current.

Feature Summary

• Integrates battery backup switching and chip-enable gating for enhanced power control
• Provides manual reset capability alongside automatic voltage supervision
• Features active-low push-pull output for direct logic interfacing

Applications

• Portable electronic devices requiring low standby current
• Battery-powered systems needing voltage supervision and backup management
• Embedded controllers utilizing chip-enable signal gating

Procurement Notes

Verify the specific suffix LKA44 to confirm the 4.38V threshold voltage, as the MAX6365 series offers multiple threshold options. Confirm package integrity for SOT-23-8 components. Check manufacturer documentation for RoHS compliance status and lead times. Ensure compatibility with system voltage ranges between 1.2V and 5.5V. Validate that the active-low output polarity matches the target controller requirements.

Selection Notes

Select this component when a fixed 4.38V supervision threshold is required for single-input monitoring. The integrated battery backup and chip-enable features make it suitable for complex power sequencing applications. Consider the 15µA quiescent current for battery life optimization. The manual reset function allows for user-initiated system recovery. Ensure the application environment stays within the specified -40°C to +85°C temperature range.

Part Context

This part belongs to the MAX6365L family of low-power supervisors. It shares architectural similarities with other variants in the series but differs in its specific threshold voltage setting. The device complements Maxim's portfolio of power management ICs designed for space-constrained portable electronics. It serves as a critical component for ensuring system stability during brown-out conditions or power loss events.

Replacement Considerations

Cross-reference with other MAX6365 variants having identical SOT-23-8 packaging and functional pinouts. Verify that substitute parts match the 4.38V threshold and active-low push-pull output characteristics. Ensure replacement components support the same 1.2V to 5.5V operating voltage range and temperature specifications.