MAX6468US30D3-T

Overview

The MAX6468US30D3-T is a microprocessor supervisory reset circuit manufactured by Analog Devices Inc. (Maxim Integrated). It monitors single power-supply voltages ranging from +1.8V to +5.0V and asserts an active-low, push-pull reset signal if the supply voltage drops below its preset threshold of 3.075V. The device features a fixed reset timeout period of 225ms and includes an edge-triggered, one-shot manual reset function. It operates within a temperature range of -40°C to +125°C with a maximum supply voltage of 5.5V and a typical quiescent current of 7µA.

Feature Summary

• Edge-triggered, one-shot manual reset function ensures the microprocessor enters reset mode for a fixed timeout period only, even during continuously asserted manual reset signals.

Applications

• Microprocessor (µP) supervisory circuits
• Single power-supply voltage monitoring systems

Procurement Notes

Verify component authenticity and RoHS compliance status carefully, as datasheet records indicate conflicting lead-free information for this specific suffix variant. Confirm package integrity and pinout alignment with SOT-143 specifications before integration. Cross-reference ordering part numbers with official manufacturer documentation to ensure functional equivalence, particularly regarding the factory-trimmed threshold voltage accuracy.

Selection Notes

Select this component when a fixed 3.075V threshold is required for single-supply monitoring applications. The push-pull output type distinguishes it from open-drain variants in the same family. Ensure the system design accommodates the 225ms reset delay and that the operating voltage remains within the 1.8V to 5.0V monitored range. Verify thermal requirements against the specified -40°C to +125°C operational limits.

Part Context

This part belongs to the MAX6467/MAX6468 series of microprocessor supervisory circuits designed to improve system reliability compared to traditional manual reset designs. The US30D3 suffix indicates a specific factory-trimmed threshold voltage option within the broader product line, eliminating the need for external components to set reset levels.

Replacement Considerations

Consult official substitution guides for equivalent supervisory circuits with matching threshold voltages and output configurations. Verify compatibility with existing PCB footprints and electrical parameters before transitioning to alternative manufacturers or updated series revisions.