MAX6348XR39-T

Overview

The MAX6348XR39+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 an active low, open drain output. The device monitors a single input with a threshold voltage of 3.9 V and an overvoltage threshold of 3.958 V. It consumes 500 nA of operating current and provides a reset delay time of 280 ms. The component functions reliably across a temperature range from -40 C to +85 C. It is housed in a SC-70-3 package and does not include manual reset, watchdog timer, or battery backup switch capabilities.

Feature Summary

• Ultra-low-power operation with 500 nA supply current consumption
• Active low open drain reset output for direct logic interfacing
• Factory-set reset threshold voltage for simplified design integration

Applications

• Microprocessor (µP) power supply monitoring
• Battery-powered portable electronic devices
• Consumer electronics requiring low standby current
• Industrial control systems with limited power budgets

Procurement Notes

Verify the exact part number suffix against official manufacturer documentation. The provided model lacks the plus sign indicating lead-free status; confirm if the +T variant is required for compliance. Check current availability status as distribution channels may list restricted supply conditions. Ensure the SC-70-3 package matches your PCB footprint requirements before finalizing procurement orders.

Selection Notes

Select this component when designing circuits that require minimal quiescent current to extend battery life. The fixed 3.9 V threshold suits applications monitoring standard 3.3 V or 5 V rails. Consider the 280 ms reset delay duration to ensure system stability during power-up sequences. Verify that the open drain output capability aligns with the downstream logic gate input requirements.

Part Context

This device belongs to the MAX6348 series of ultra-low-power reset circuits. The series offers various threshold voltages and packages to accommodate different monitoring needs. The XR39 designation specifically indicates the SC-70-3 package form factor and the 3.9 V threshold setting within the broader product family lineup.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material. Consult official manufacturer cross-reference guides for compatible alternatives.