MAX6333UR22D3+

Overview

The MAX6333UR22D3+T is a microprocessor supervisory circuit from the MAX6333 series, designed for 1.8V to 3.3V systems. It features a fixed 2.2V threshold voltage and an active-low push-pull RESET output. The device operates within a supply voltage range up to 5.5V with a typical quiescent current of 3.3uA. It provides a reset timeout period of 100ms minimum. The component is housed in a SOT-23-3 surface-mount package and supports an extended operating temperature range from -40°C to +125°C.

Feature Summary

• Monitors power supply voltage and asserts reset when below preset threshold
• Provides active-low push-pull output for direct logic interfacing
• Ultra-low power consumption suitable for battery-operated applications

Applications

• Microprocessor (µP) system supervision
• Digital system power monitoring
• Embedded controller reset generation

Procurement Notes

Verify the specific suffix 'T' indicates tape-and-reel packaging if required for automated assembly. Confirm RoHS compliance status through official documentation as '+T' typically denotes lead-free and halogen-free materials. Check current lifecycle status as Analog Devices may discontinue older Maxim Integrated part numbers. Ensure the 2.2V threshold matches the target system's brown-out requirements before finalizing procurement.

Selection Notes

Select this part when a fixed 2.2V threshold is required for low-voltage digital logic. Choose the push-pull output variant over open-drain if driving higher capacitive loads or requiring faster rise times without external pull-ups. Consider the SOT-23-3 package size constraints against available PCB real estate. Verify that the 100ms timeout meets the startup time requirements of the monitored microprocessor.

Part Context

This component belongs to the MAX6332/MAX6333/MAX6334 family of 3-pin ultra-low-voltage reset circuits. The MAX6333 specifically offers an active-low push-pull output, distinguishing it from the MAX6332 (active-high push-pull) and MAX6334 (active-low open-drain). These devices eliminate external components by integrating precise voltage thresholds and timeout timers into a small footprint.

Replacement Considerations

MAX6333UR22D3+TTR is the reel version of the same electrical specification. Cross-reference with MAX6333 series variants having different thresholds (e.g., UR18, UR25) if voltage levels differ. No direct pin-compatible substitutes from other manufacturers are confirmed in public data.