MAX6346UR46+T

Overview

The MAX6346UR46+T is a 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 threshold voltage of 4.63 V with an accuracy of 1.5%. The device provides an active low, push-pull output and includes a reset delay time of 185 ms. It consumes a maximum power dissipation of 320 mW and functions at a working supply current of 500 nA. The component supports overvoltage detection with a threshold of 4.699 V and operates across a temperature range from -40°C to +85°C.

Feature Summary

• Ultra-low-power operation suitable for battery-supplied systems
• Active low push-pull output driver for direct logic interface
• Precision voltage monitoring with specified accuracy

Applications

• Portable electronic devices requiring low standby current
• Battery-powered instrumentation systems
• Microprocessor reset circuits in embedded controllers

Procurement Notes

Verify the specific suffix UR46 to confirm the 4.63 V threshold voltage, as the MAX6346 series offers multiple threshold options. Ensure the SOT-23-3 package matches your PCB footprint requirements. Confirm RoHS compliance status through official manufacturer documentation prior to integration. Check for any lead-free plating specifications if required by your assembly process standards.

Selection Notes

Select this component when a fixed 4.63 V supervision level is required without manual reset functionality. The ultra-low quiescent current makes it suitable for energy-constrained applications. Consider the 185 ms reset delay for system timing constraints. Verify that the 5.5 V maximum operating voltage aligns with your system's supply rails. The absence of a watchdog timer simplifies design but limits fault recovery capabilities.

Part Context

This part belongs to the MAX6346 family of micropower voltage supervisors. These devices are designed to monitor single voltage rails in portable and battery-operated equipment. The series emphasizes minimal power consumption while maintaining reliable reset generation. The MAX6346UR46+T specifically targets applications needing precise supervision around the 4.63 V level.

Replacement Considerations

The ADM6346-42ARTZ-R7 is a related device in the same family but features a different threshold voltage (4.2 V) and reset delay time (20 us). Verify electrical compatibility before substitution. Other MAX6346 variants may share the package but differ in threshold settings.