MAX6347XR46

Overview

The MAX6347XR46+T is a microprocessor supervisory circuit from the MAX6347 series, manufactured by Analog Devices Inc./Maxim Integrated. It monitors a single power-supply input with a fixed reset threshold voltage of 4.63 V and an overvoltage threshold of 4.699 V. The device features an active-high, push-pull reset output and operates within a supply voltage range up to 5.5 V. It consumes a maximum supply current of 1 µA and ensures a minimum reset timeout delay of 100 ms. The component is rated for operation between -40°C and +85°C, housed in a compact SC-70-3 package.

Feature Summary

• Provides ultra-low power consumption suitable for portable equipment applications
• Delivers precise monitoring of standard digital system power supplies
• Features a factory-trimmed reset threshold for reliable voltage supervision

Applications

• Microprocessor power supply monitoring in digital systems
• Portable electronic devices requiring low standby current
• Battery-powered circuits needing voltage supervision

Procurement Notes

Verify the specific suffix (+T) indicates tape-and-reel packaging when ordering. Confirm the exact threshold voltage matches the design requirement, as the MAX6347 series offers multiple fixed options. Check RoHS compliance status and ensure the SC-70-3 footprint aligns with the PCB layout. Validate availability through authorized distributors due to potential lifecycle changes.

Selection Notes

Select this part if an active-high reset signal is required, distinguishing it from the active-low MAX6346 or MAX6348 variants. Ensure the 4.63 V threshold aligns with the monitored rail. Consider the 1 µA max supply current for battery life optimization. Verify that the SC-70-3 package size fits the spatial constraints of the application.

Part Context

The MAX6347 belongs to a family of ultra-low-power supervisory circuits designed to eliminate external components in 2.5V, 3V, 3.3V, and 5V powered systems. It guarantees correct reset states down to 1 V and ignores fast transients on the supply voltage. The series includes variants with different output polarities and thresholds to suit various digital logic requirements.

Replacement Considerations

Direct functional substitutes within the same series include MAX6346 (active-low push-pull) and MAX6348 (active-low open-drain) with matching 4.63 V thresholds. Other MAX6347 variants with different thresholds may be used if the voltage level is adjusted accordingly.