MAX6334UR20D3+T

Overview

The MAX6334UR20D3+T is a 3-pin, ultra-low-voltage, low-power microprocessor supervisory circuit manufactured by Analog Devices Inc. (Maxim Integrated). It monitors a single voltage input with a fixed reset threshold of 2.0V. The device features an active-low, open-drain RESET output and provides a reset delay time of 40ms. It operates within a supply voltage range up to 5.5V and functions across a temperature range of -40°C to +125°C. The component is housed in an SOT-23-3 surface-mount package.

Feature Summary

• Monitors power supply voltage and asserts reset signal when voltage drops below preset threshold
• Provides active-low open-drain RESET output for flexible logic interfacing
• Ultra-low quiescent current consumption suitable for battery-powered applications
• Eliminates external components and adjustments to reduce system cost

Applications

• Microprocessor (µP) supervisory circuits in digital systems
• Battery-operated electronic devices requiring power monitoring
• Consumer electronics with strict power management requirements
• Industrial control systems operating in wide temperature ranges

Procurement Notes

Verify the exact suffix designation (+T vs -T) against official Analog Devices documentation, as suffixes may indicate specific tape-and-reel configurations or regional variations. Confirm RoHS compliance status directly from the manufacturer's latest datasheet revision. Check current lifecycle status, as this part number may be obsolete or discontinued. Ensure the open-drain output configuration matches your system's pull-up resistor requirements before procurement.

Selection Notes

Select this component when an open-drain output is required for the supervisory function. The fixed 2.0V threshold suits 1.8V to 3.3V systems where this specific voltage level is appropriate. Consider the SOT-23-3 package size for space-constrained designs. Verify that the 40ms timeout period aligns with the target microprocessor's startup requirements. Compare against MAX6333 if a push-pull output is needed instead.

Part Context

The MAX6334 belongs to the MAX6332/MAX6333/MAX6334 family of 3-pin, ultra-low-voltage, low-power µP reset circuits. These devices monitor power supplies in 1.8V to 3.3V microprocessor and digital systems. The primary distinction within the family is the output type: MAX6332 offers active-high push-pull, MAX6333 provides active-low push-pull, while the MAX6334 variant specifically delivers an active-low open-drain output.

Replacement Considerations

Direct substitute part numbers include MAX6334UR20D3-T. Verify compatibility regarding output stage characteristics and threshold voltages when considering alternatives.