MAX6332UR22D3+

Overview

The MAX6332UR22D3+ is a microprocessor supervisory circuit manufactured by Analog Devices Inc. under the Maxim Integrated brand. It operates within a supply voltage range of 1.8V to 5.5V and features a fixed reset threshold of 2.2V. The device provides an active-high, push-pull RESET output signal. It includes a typical timeout period of 40ms to ensure stable power-up conditions. The component is housed in a compact SOT-23-3 surface-mount package. It functions without manual reset inputs or watchdog timers, drawing a low quiescent current of approximately 3.3µA. The operational temperature range extends from -40°C to +125°C.

Feature Summary

• Monitors power supply voltage and asserts a reset signal when the input drops below the preset threshold.
• Provides an active-high, push-pull output suitable for direct interfacing with digital logic systems.
• Eliminates external components by integrating fixed threshold detection and timeout functionality.

Applications

• Microprocessor (µP) power supply monitoring in embedded systems
• Digital system voltage supervision
• Battery-powered devices requiring low standby current

Procurement Notes

Verify the specific suffix D3+ against official datasheets to confirm the 2.2V threshold and active-high output configuration. Ensure compatibility with the target PCB footprint, specifically the SOT-23-3 package dimensions. Confirm that the active-high output polarity aligns with the receiving logic gate requirements before integration into the design.

Selection Notes

Select this component when an active-high reset signal is required, distinguishing it from the MAX6333 series which offers active-low outputs. The fixed 2.2V threshold makes it suitable for 3.3V logic systems where precise threshold adjustment is unnecessary. Consider the SOT-23-3 package size for space-constrained designs compared to larger packages.

Part Context

This part belongs to the MAX6332/MAX6333/MAX6334 family of 3-pin, ultra-low-voltage, low-power µP reset circuits. While the MAX6333 variant provides an active-low push-pull output and the MAX6334 offers an active-low open-drain output, the MAX6332 uniquely provides an active-high push-pull output. All variants share similar low-power characteristics and thermal performance profiles.

Replacement Considerations

The MAX6333UR22D3+ serves as a functional substitute if the application can tolerate an active-low output signal instead of the active-high output provided by the MAX6332. Both parts share identical thresholds, packages, and electrical characteristics other than output polarity.