MAX6347UR44+T

Overview

The MAX6347UR44+T is a microprocessor supervisory circuit manufactured by Analog Devices Inc./Maxim Integrated. It monitors power supplies in digital systems and asserts an active-high push-pull reset signal when the VCC supply voltage declines below a preset threshold. The device maintains this state for at least 100ms after VCC rises above the threshold. Key electrical parameters include a maximum supply current of 1µA, a reset threshold range from 2.2V to 4.63V, and a minimum power-on reset pulse width of 100ms. It operates within a temperature range of -40°C to +85°C and is housed in a SOT-23-3 package.

Feature Summary

• Provides active-high push-pull reset output for system supervision
• Features ultra-low supply current suitable for portable equipment
• Includes factory-trimmable reset thresholds for precise monitoring
• Guaranteed correct state for supply voltages down to 1V

Applications

• Microprocessor (µP) supervisory circuits
• Digital system power supply monitoring
• Portable equipment with low-power requirements

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm RoHS compliance status and check for specific lot traceability requirements. Ensure the ordering suffix matches the required package and temperature grade. Request official datasheets and certification documents prior to finalizing procurement decisions to guarantee specification adherence.

Selection Notes

Select this component when an active-high reset output is required for voltage supervision. Compare against the MAX6346 series if an open-drain or push-pull active-low output is preferred instead. Consider the 1µA supply current constraint for battery-operated designs. Verify that the available threshold range covers the specific voltage monitoring needs of the target application circuit.

Part Context

This part belongs to the MAX63xx family of microprocessor supervisory circuits designed for reliable power management. It shares functional similarities with the MAX6326, MAX6327, and MAX6328 series, differing primarily in output configuration and specific threshold options. The MAX6347 variant specifically provides an active-high push-pull output, distinguishing it from the active-low variants within the same product line.

Replacement Considerations

The MAX6346UR44+T serves as a functional alternative but features an active-low push-pull output rather than active-high. Designers must verify logic compatibility when substituting between these variants. Other members of the MAX63xx family may offer different output types such as open-drain configurations.