MAX6346XR44-T

Overview

The MAX6346XR44-T is a microprocessor supervisory circuit manufactured by Analog Devices Inc./Maxim Integrated. It monitors a single voltage input with a threshold of 4.38V and an accuracy of 1.5%. The device features an active-low, push-pull reset output with a minimum timeout of 100ms. It operates within a supply voltage range up to 5.5V and consumes low quiescent current. The component is housed in a SOT-23-3 package and supports surface mount installation across a temperature range of -40°C to +85°C.

Feature Summary

• Monitors power-supply voltages using a factory-set reset threshold
• Provides automatic reset assertion when supply voltage falls below the threshold
• Maintains reset state for a specified timeout period after voltage recovery

Applications

• Microprocessor system power supervision
• Battery-operated equipment monitoring
• Portable instrumentation power management

Procurement Notes

Verify the exact suffix against official documentation, as standard listings often use MAX6346UR44+T or similar variants. Confirm RoHS compliance status and lead-free specifications directly from the manufacturer datasheet before procurement. Ensure the ordering part number matches the required threshold voltage and package type precisely.

Selection Notes

Select this component for applications requiring simple, low-power voltage supervision without manual reset inputs. The fixed threshold simplifies design compared to adjustable regulators. Verify that the 100ms timeout meets system startup requirements and that the SOT-23-3 footprint fits the PCB layout constraints.

Part Context

This part belongs to the MAX6346 series of ultra-low-power reset circuits designed for portable electronics. It serves as a fundamental power management component ensuring system stability during brown-out conditions. The series is characterized by minimal supply current consumption and compact packaging suitable for space-constrained designs.

Replacement Considerations

Check for direct pin-compatible alternatives within the MAX6346 family with different threshold voltages if the 4.38V setting is unsuitable. Verify that substitute parts maintain the same active-low push-pull output configuration and thermal performance characteristics.