MAX6467US44D3

Overview

The MAX6467US44D3 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 a reset signal if the supply voltage drops below its preset threshold. The device features an edge-triggered, one-shot manual reset function that ensures the microprocessor enters reset mode for a fixed timeout period only, even during continuously asserted manual resets. It operates within a temperature range of -40°C to +125°C, consumes 7µA of quiescent current, and has a maximum supply voltage of 5.5V. The reset delay time is 225ms, and it utilizes a SOT-143-4 package.

Feature Summary

• Edge-triggered, one-shot manual reset function prevents indefinite reset states
• Factory-trimmed threshold options eliminate external components
• Active-low open-drain output for direct microprocessor interface

Applications

• Microprocessor (µP) supervisory circuits
• Single power-supply voltage monitoring systems
• Embedded systems requiring reliable reset generation

Procurement Notes

Verify component authenticity through authorized distributors or manufacturer channels. Confirm RoHS compliance status as lead-free variants (+ suffix) differ from leaded versions. Check datasheet revisions for pinout and electrical parameter updates. Ensure packaging type matches design requirements. Validate operating temperature range suitability for target environment.

Selection Notes

Select based on required reset threshold voltage matching the monitored supply rail. Consider quiescent current impact on battery-powered applications. Verify package compatibility with PCB layout constraints. Evaluate reset timeout duration against microprocessor startup requirements. Confirm manual reset functionality meets system safety needs.

Part Context

Part of the MAX6467/MAX6468 family of microprocessor supervisory circuits designed for improved system reliability over traditional manual reset designs. These devices integrate factory-set thresholds and reset timers to reduce external component count and simplify design implementation.

Replacement Considerations

MAX6467US44D3+T is the lead-free equivalent variant. Cross-reference with MAX6468 series for similar functionality with different threshold options. Verify package and pinout compatibility before substitution.