MAX6343LUT

Overview

The MAX6343LUT is a microprocessor supervisory circuit manufactured by Analog Devices Inc. under the Maxim Integrated brand, housed in a compact SOT-23-6 surface-mount package. It monitors a single power supply input with a fixed reset threshold voltage of 2.5V and an overvoltage threshold of 2.38V. The device features an active-low push-pull output and provides a reset delay time of 280ms to ensure stable system initialization. Operating within a supply voltage range up to 5.5V, it draws a typical quiescent current of 15µA. The component supports an extended industrial temperature range from -40°C to +85°C and includes battery backup functionality for continuous monitoring during power transitions.

Feature Summary

• Provides reliable microprocessor reset generation through factory-trimmed voltage supervision
• Integrates battery backup capability to maintain monitoring continuity across power cycles
• Delivers active-low push-pull output signals for direct interface with digital logic

Applications

• Microprocessor system power supply monitoring
• Battery-powered electronic devices requiring low standby current
• Industrial control systems operating in extended temperature environments

Procurement Notes

Verify the specific suffix designation against official datasheets to confirm pinout compatibility and electrical characteristics. Confirm RoHS compliance status and manufacturing origin prior to integration. Ensure the selected variant matches the required threshold voltage and package type for the target application design.

Selection Notes

Select this component when a fixed 2.5V reset threshold is required for single-supervision applications. Consider the SOT-23-6 footprint for space-constrained designs. Evaluate the 15µA quiescent current against total system power budgets. Verify that the 280ms reset delay aligns with the startup timing requirements of the controlled processor or logic circuitry.

Part Context

This part belongs to the MAX6342–MAX6345 family of µP reset circuits designed to improve system reliability. These devices replace discrete components by providing integrated power-fail detection and reset generation. The MAX6343 specifically offers a 2.5V threshold with push-pull output, distinguishing it from open-drain variants in the same series.

Replacement Considerations

Compatible substitutes include other members of the MAX634x family such as the MAX6342LUT (with manual reset input) or MAX6344LUT (with different threshold). Cross-reference exact threshold voltages and output configurations before substitution.