MAX6337US17D3+T

Overview

The MAX6337US17D3+T is a microprocessor supervisory circuit designed for ultra-low-voltage and low-power applications. It monitors system voltage with a fixed threshold of 1.7V, asserting an active-low reset signal when the supply drops below this level or upon manual reset input activation. The device features an open-drain output and operates within a supply range up to 5.5V. It includes a 100ms minimum reset timeout and maintains high accuracy of 1.8%. Designed for robust performance, it functions across an extended temperature range from -40°C to +125°C while consuming only 3.3µA of operating current.

Feature Summary

• Monitors power supply voltage against a preset threshold to ensure system reliability
• Features a debounced manual-reset input for user-initiated system resets
• Provides an active-low, open-drain reset output compatible with various logic families
• Eliminates external components by integrating supervision functions into a compact package

Applications

• Monitoring power supplies in 1.8V to 3.3V microprocessor systems
• Digital system supervision requiring low quiescent current
• Battery-powered devices needing reliable voltage monitoring
• Embedded systems requiring manual reset capability

Procurement Notes

Verify the specific suffix 'D3' indicates the tape-and-reel packaging configuration as per manufacturer documentation. Confirm that the '+T' designation aligns with lead-free and RoHS compliance requirements specified in the official datasheet. Ensure the ordering part number matches the exact threshold voltage variant required for your application design. Cross-reference the manufacturer's latest release notes for any updates to pinout or electrical characteristics before finalizing procurement.

Selection Notes

Select this component when a fixed 1.7V threshold is appropriate for the target microprocessor supply rail. Consider the open-drain output type if wired-OR configurations are needed in the system design. Evaluate the 3.3µA operating current against total system power budgets for battery longevity. Verify that the SOT-143-4 package fits within the available PCB area constraints. Ensure the 100ms reset timeout meets the startup timing requirements of the connected digital logic.

Part Context

This part belongs to the MAX6337 series of ultra-low-voltage, low-power microprocessor reset circuits. The series offers various fixed threshold voltages to accommodate different supply rails ranging from 1.2V to 3.3V. All variants share common features including manual reset inputs, open-drain outputs, and extended temperature ratings. The US17D3+T specifically targets applications requiring precise monitoring at the 1.7V level within the broader family of supervisory solutions.

Replacement Considerations

Direct substitutes within the same series include MAX6337US16D3+T (1.6V threshold) and MAX6337US23D3+T (2.3V threshold), provided the threshold difference is acceptable. Other Maxim Integrated supervisor ICs with similar pinouts and functionality may serve as alternatives if threshold adjustments are permissible. Always verify pin compatibility and electrical specifications before substituting.