MAX6328UR22

Overview

The MAX6328UR22+T is a single-channel voltage supervisory circuit manufactured by Analog Devices Inc./Maxim Integrated. It operates within a supply voltage range up to 5.5V and features a fixed threshold voltage of 2.2V for power monitoring. The device provides an active-low reset signal with an open-drain output configuration, ensuring compatibility with various logic families. It includes a minimum reset timeout of 100ms to guarantee proper system initialization. Designed for surface-mount installation in SOT-23-3 packages, it supports industrial temperature ranges from -40°C to +85°C. The component draws a typical operating current of 500nA, making it suitable for ultra-low-power applications requiring reliable voltage supervision without manual reset or watchdog timer functions.

Feature Summary

• Ultra-low-power operation with minimal standby current consumption
• Fixed threshold voltage detection for precise power monitoring
• Active-low open-drain reset output for flexible logic interfacing
• Guaranteed reset timeout duration for stable system initialization

Applications

• Portable battery-powered equipment requiring extended battery life
• Microcontroller and DSP power supply supervision systems
• Embedded control circuits needing reliable brown-out protection
• Industrial instrumentation with strict voltage monitoring requirements

Procurement Notes

Verify the complete part number including suffixes such as +T for tape-and-reel packaging when ordering. Confirm RoHS compliance status and manufacturing origin through official distributor channels. Check for any recent product change notices or lifecycle updates that may affect availability. Ensure storage conditions meet moisture sensitivity level requirements prior to assembly. Cross-reference datasheet revisions to confirm electrical characteristics match design specifications.

Selection Notes

Choose this component when a fixed 2.2V threshold is required for voltage supervision. The open-drain output allows connection to pull-up resistors matching the target logic voltage levels. Consider the 100ms minimum reset timeout for systems requiring guaranteed initialization periods. Evaluate the SOT-23-3 package size against available board space constraints. Verify that the 500nA quiescent current aligns with overall system power budget requirements.

Part Context

The MAX6328 series belongs to Maxim Integrated's family of ultra-low-power reset circuits designed for voltage monitoring applications. These devices provide simple power-supply supervision without complex configuration requirements. The MAX6328 variant specifically offers fixed threshold options across multiple voltage levels. This series emphasizes low current consumption while maintaining accurate voltage detection capabilities for portable and battery-operated electronic systems.

Replacement Considerations

MAX6328UR27+T provides a 2.7V threshold alternative within the same package. MAX6328UR30+T offers a 3.0V threshold option for different supply voltages. MAX6328UR33+T serves as a 3.3V threshold replacement. All variants share identical pinouts and functional characteristics except for threshold voltage differences.