MAX6346XR46

Overview

The MAX6346XR46 is a voltage supervisory circuit manufactured by Analog Devices Inc./Maxim Integrated. It operates within a supply voltage range of up to 5.5 V and features a fixed threshold voltage of 4.63 V for monitoring power rails. The device provides an active low, push-pull reset output with a typical reset delay time of 185 ms. Designed for surface mount installation, it is available in a compact SOT-23-3 package. The component supports an operating temperature range from -40°C to +85°C and consumes a maximum quiescent current of 500 nA.

Feature Summary

• Ultra-low-power consumption suitable for battery-operated systems
• Fixed threshold voltage ensures precise power supply monitoring
• Compact three-pin SOT-23 package minimizes board space

Applications

• Portable electronic devices requiring low standby current
• Battery-powered instrumentation and sensors
• Microprocessor system power supervision

Procurement Notes

Verify the specific suffix 'XR46' against official manufacturer documentation to confirm the exact threshold voltage and package variant. Ensure compatibility with the target PCB footprint for the SOT-23-3 package. Confirm that the required reset delay and output drive characteristics meet the design specifications before finalizing procurement.

Selection Notes

Select this component when a fixed 4.63 V threshold is required for single-input voltage monitoring. Consider the 500 nA supply current for applications prioritizing energy efficiency over ultra-low leakage. Verify that the active low push-pull output interface aligns with the connected logic inputs without requiring additional pull-up or level-shifting components.

Part Context

This part belongs to the MAX6346 series of microprocessor reset circuits designed for low-voltage applications. The series offers various threshold options and packaging configurations to accommodate different system requirements while maintaining consistent low-power performance characteristics across the product line.

Replacement Considerations

Check for direct pin-compatible alternatives within the same series offering different threshold voltages if the 4.63 V setting does not match the target rail. Verify functional equivalence regarding reset delay times and output drive capabilities when considering cross-brand substitutes.