MAX6333UR16D3+

Overview

The MAX6333UR16D3+ is a 3-pin, ultra-low-voltage, low-power microprocessor supervisory circuit manufactured by Analog Devices Inc./Maxim Integrated. It monitors a single power supply input and asserts an active-low, push-pull reset signal when the supply voltage drops below a fixed threshold of 1.6V. The device operates within a supply voltage range up to 5.5V and features a typical reset delay time of 200ms. It consumes only 3.3µA of quiescent current, making it suitable for battery-powered applications. The component is available in a compact SOT-23-3 surface-mount package and functions reliably across an extended industrial temperature range from -40°C to +125°C.

Feature Summary

• Provides reliable system reset by monitoring supply voltage against a fixed 1.6V threshold
• Features an active-low push-pull output driver for direct interface with digital logic
• Ultra-low power consumption of 3.3µA ensures minimal impact on battery life
• Compact 3-pin SOT-23 package minimizes printed circuit board space requirements

Applications

• Portable electronic devices requiring strict power management
• Battery-operated consumer electronics systems
• Microprocessor and digital system power supervision
• Handheld instruments with limited power budgets

Procurement Notes

Verify the specific suffix D3+ indicates the 1.6V threshold variant during procurement. Confirm RoHS compliance status as indicated by the plus sign. Check current availability status as distribution channels may vary. Ensure the SOT-23-3 package matches your PCB footprint design constraints before finalizing orders.

Selection Notes

Select this component when a fixed 1.6V reset threshold is required for low-voltage systems. Choose the push-pull output configuration if driving loads directly without external pull-up resistors. Consider the 3.3µA current draw for energy-sensitive designs. Verify that the 5.5V maximum operating voltage aligns with your system's supply rails.

Part Context

This part belongs to the MAX6332/MAX6333/MAX6334 family of 3-pin uP reset circuits. While sharing similar packaging and low-power characteristics, the MAX6333 specifically provides an active-low push-pull output. Other family members offer different output polarities or open-drain configurations. The UR16 designation specifies the unique 1.6V threshold voltage setting for this particular model.

Replacement Considerations

Direct substitutes include other MAX6333 variants with different threshold voltages, such as MAX6333UR18D3+ (1.8V) or MAX6333UR23D3+ (2.3V), provided the reset timing requirements remain compatible. Ensure the replacement maintains the same SOT-23-3 package and active-low push-pull output type.