MAX6334UR20D3-T

Overview

The MAX6334UR20D3-T is a microprocessor supervisory circuit manufactured by Analog Devices Inc. (Maxim Integrated). It monitors a single voltage input and provides an active-low, open-drain reset output when the supply voltage drops below a preset threshold of 2.0V. The device operates within a supply voltage range up to 5.5V and features a typical reset delay time of 150ms. It consumes a low quiescent current of 3.3µA and functions reliably across an extended temperature range from -40°C to +125°C. Packaged in a compact SOT-23-3 surface-mount case, it eliminates external components for power monitoring.

Feature Summary

• Monitors system power supply voltage and asserts a reset signal when the voltage falls below a specific threshold
• Provides an active-low, open-drain reset output compatible with various logic families
• Operates with ultra-low quiescent current consumption suitable for battery-powered applications
• Ensures reliable operation over an extended industrial temperature range without manual reset functionality

Applications

• Microprocessor and digital system power supply monitoring
• Battery-operated portable electronic devices requiring low standby current
• Embedded systems needing automatic power-fail detection
• Industrial control units operating in extreme temperature environments

Procurement Notes

Verify the exact suffix D3 against official datasheets to confirm the 2.0V threshold and 150ms timeout parameters. Confirm RoHS compliance status and lead times directly with authorized distributors as availability may vary. Ensure the SOT-23-3 package matches your PCB footprint requirements before ordering.

Selection Notes

Select this component when an open-drain output is required for wired-OR configurations or level shifting. Compare against the MAX6333 series if a push-pull output is preferred instead. Verify that the 2.0V threshold aligns with your system's minimum operating voltage requirements and that the 150ms delay meets your startup timing constraints.

Part Context

This part belongs to the MAX633x family of ultra-low-voltage, low-power µP reset circuits. These devices are designed to increase circuit reliability by eliminating external components and adjustments. The MAX6334 variant specifically offers an active-low, open-drain output, distinguishing it from the push-pull outputs of other family members like the MAX6332 and MAX6333.

Replacement Considerations

The MAX6334UR20D3+T is a direct replacement for the MAX6334UR20D3-T. Check for pin-compatible alternatives within the MAX6333 series if output drive type differences are acceptable.