MAX6347XR40-T

Overview

The MAX6347XR40-T is a microprocessor supervisory circuit manufactured by Analog Devices Inc. (Maxim Integrated). It monitors power-supply voltages and asserts an active-high, push-pull reset signal when the supply voltage declines below a preset threshold. The device features ultra-low supply current of 1µA maximum and provides a minimum power-on reset pulse width of 100ms. It operates within a supply voltage range of 2.5V to 5.5V and includes a factory-set reset threshold of 4.0V. The component is housed in a space-saving SC-70-3 package and is specified for operation over an industrial temperature range of -40°C to +85°C.

Feature Summary

• Provides active-high push-pull reset output for reliable system initialization
• Ultra-low supply current consumption ideal for portable equipment
• Factory-trimmed reset thresholds ensure precise voltage monitoring without external adjustments

Applications

• Microprocessor and digital system power supply supervision
• Portable electronic devices requiring low standby current
• Battery-powered systems with strict power management requirements

Procurement Notes

Verify the specific suffix 'XR40' confirms the 4.0V threshold variant. Confirm the '-T' designation indicates tape-and-reel packaging. Check current availability status as this series may have limited stock or obsolescence notices. Ensure the SC-70-3 package matches your PCB footprint requirements before finalizing procurement.

Selection Notes

Select this component when an active-high reset signal is required, distinguishing it from the open-drain MAX6348 variants. Choose based on the fixed 4.0V threshold if it aligns with the target supply rail. Consider the 1µA max current for battery life optimization. Verify that the 100ms minimum timeout meets the system's startup timing constraints.

Part Context

The MAX6347 belongs to the Maxim Integrated family of ultra-low-power SC70/SOT reset circuits. It shares architectural similarities with the MAX6326, MAX6327, MAX6328, MAX6346, and MAX6348. These devices eliminate external components for standard voltage rails. The MAX6347 specifically offers the active-high push-pull output configuration, contrasting with the active-low options available in other members of the series.

Replacement Considerations

Direct functional substitutes include the MAX6347XR40+ (non-tape version) or other MAX6347 variants with matching thresholds. Cross-reference with MAX6327 series parts for identical electrical characteristics but different package styles. Verify pin compatibility when replacing with generic supervisor ICs.