MAX6333UR19D3

Overview

The MAX6333UR19D3 is a microprocessor supervisory circuit from the MAX6333 series, designed for 1.8V to 3.3V systems. It features a fixed reset threshold voltage of 1.9V and an active-low push-pull output. The device operates within a supply voltage range up to 5.5V and consumes only 3.3µA of quiescent current. It provides a standard reset timeout period of 100ms to ensure stable power-up sequencing. The component is housed in a compact SOT-23-3 surface-mount package and supports an extended industrial temperature range from -40°C to +125°C.

Feature Summary

• Monitors single power supply input with fixed threshold detection
• Provides active-low push-pull reset signal output
• Ultra-low power consumption suitable for battery-operated devices
• Compact three-pin surface-mount packaging

Applications

• Microprocessor system power supervision
• Digital logic circuit voltage monitoring
• Battery-powered portable equipment reset management
• Embedded controller power-on reset generation

Procurement Notes

Verify the specific suffix D3 confirms the 1.9V threshold variant during sourcing. Confirm RoHS compliance status as indicated by the plus sign in related part numbers. Check manufacturer lifecycle status as some variants may be obsolete or limited supply. Ensure the SOT-23-3 footprint matches your PCB design requirements before finalizing procurement.

Selection Notes

Select this component when a fixed 1.9V threshold is required for low-voltage digital systems. Choose the push-pull output configuration if driving loads directly without external pull-ups. Consider the 100ms timeout duration against your system's power-up stability needs. Verify that the 5.5V maximum supply rating accommodates your highest expected input voltage spikes.

Part Context

This part belongs to the MAX6332/MAX6333/MAX6334 family of ultra-low-voltage reset circuits. The MAX6333 variant specifically offers an active-low push-pull output, distinguishing it from the open-drain MAX6334 and active-high MAX6332. These devices eliminate external components by integrating precise voltage monitoring and timing functions into a small package.

Replacement Considerations

MAX6333UR19D2+T offers a similar function but with a different timeout characteristic. MAX6333UR19D1+T provides a faster reset delay. MAX6333UR19D3+T is the leaded version of the same electrical specification. Verify pinout compatibility and thermal performance when substituting these variants.