MAX6334UR17D3+T

Overview

The MAX6334UR17D3+T is a microprocessor supervisory circuit from the MAX6332/33/34 family, designed for 1.8V to 3.3V digital systems. It monitors a single voltage input with a fixed threshold of 1.7V. The device features an active-low, open-drain RESET output and provides a minimum reset timeout of 100ms. It operates within a supply voltage range down to 1.0V and supports surface-mount installation in a 3-pin SOT-23 package. The component functions across an extended temperature range of -40°C to +125°C.

Feature Summary

• Provides reliable power-supply supervision by asserting a reset signal when the monitored voltage drops below the preset threshold.
• Features an open-drain active-low output suitable for interfacing with various logic families without requiring external pull-up components for basic operation.
• Designed to ignore fast transients on the supply voltage, preventing false resets during normal system noise or startup conditions.

Applications

• Microprocessor (µP) and digital system power monitoring
• Battery-powered devices requiring low quiescent current
• Space-critical embedded designs utilizing compact 3-pin packages

Procurement Notes

Verify the specific suffix D3+T against the manufacturer's official datasheet to confirm the exact threshold voltage and packaging configuration. Ensure compatibility with the target system's logic levels and thermal requirements. Confirm availability status as distribution channels may list obsolete or limited-stock variants. Cross-reference the RoHS compliance status with current environmental regulations for the intended market.

Selection Notes

Select this component when a fixed 1.7V threshold is required for systems operating between 1.8V and 3.3V. The open-drain output is ideal for wired-OR configurations or interfacing with 5V-tolerant inputs via appropriate pull-ups. Consider the 100ms minimum timeout for applications where slower power-up sequences are acceptable. The SOT-23-3 package offers a compact footprint for dense PCB layouts.

Part Context

This part belongs to the MAX633x series of ultra-low-voltage, low-power µP reset circuits manufactured by Analog Devices (Maxim Integrated). The series includes variants with push-pull or open-drain outputs and different threshold voltages. The MAX6334 specifically denotes the open-drain output version, guaranteed to operate correctly down to 1.0V supply voltage, distinguishing it from the MAX6333 which operates down to 0.7V.

Replacement Considerations

Direct substitutes include other MAX6334 variants with different thresholds (e.g., MAX6334UR18D3+T for 1.8V) or MAX6333 equivalents if push-pull output is acceptable. Verify pinout compatibility and electrical characteristics before substitution.