MAX6346UR44

Overview

The MAX6346UR44+T is a single-channel voltage supervisory circuit manufactured by Analog Devices Inc. (Maxim Integrated). It operates within a supply voltage range up to 5.5 V and features a fixed threshold voltage of 4.38 V with an accuracy of 2.5%. The device provides an active low, push-pull output and includes a reset delay time of 100 ms minimum. It consumes 1 uA of operating current and functions across a temperature range of -40°C to +85°C. Packaged in a compact SOT-23-3 surface-mount format, it lacks manual reset, watchdog timer, or battery backup switch capabilities.

Feature Summary

• Ultra-low power consumption suitable for battery-operated systems
• Compact three-pin surface-mount packaging for space-constrained designs
• Active low push-pull output driver for direct logic interface

Applications

• Portable electronic devices requiring efficient power monitoring
• Battery-powered equipment needing voltage supervision
• Embedded systems utilizing microcontroller reset management

Procurement Notes

Verify the complete part number including suffixes such as +T for tape-and-reel packaging when ordering. Confirm RoHS compliance status through official manufacturer documentation prior to procurement. Ensure compatibility with existing PCB footprints for the SOT-23-3 package. Check for obsolescence notices or lifecycle changes directly from Analog Devices before finalizing component selection for long-term production runs.

Selection Notes

Select this component when a fixed 4.38 V threshold is required for system supervision. Consider the 1 uA quiescent current for energy-sensitive applications. Verify that the active low push-pull output meets the input requirements of the downstream logic. Ensure the operating temperature range aligns with the environmental conditions of the intended deployment scenario.

Part Context

This device belongs to the MAX6346 series of micropower reset circuits designed for monitoring single voltage rails. It serves as a critical component in power management architectures where reliable system initialization and fault detection are necessary. The series offers various threshold options to accommodate different standard voltage levels commonly found in consumer and industrial electronics.

Replacement Considerations

MAX6346UR46+T: Features a higher threshold voltage of 4.63 V while maintaining similar package and electrical characteristics.