MAX6332UR18D3

Overview

The MAX6332UR18D3 is a microprocessor supervisory circuit manufactured by Analog Devices Inc. (Maxim Integrated). It monitors a single power supply input and asserts an active-high reset signal when the voltage drops below a fixed threshold of 1.8V. The device features a push-pull output configuration and operates within a supply voltage range up to 5.5V. It provides a typical reset delay of 40ms after the supply rises above the threshold. The component is housed in a compact SOT-23-3 package and supports surface-mount installation across an industrial temperature range from -40°C to +125°C.

Feature Summary

• Monitors system power supply voltage and asserts a reset signal upon undervoltage conditions
• Provides an active-high, push-pull reset output for direct logic interfacing
• Operates with ultra-low quiescent current suitable for battery-powered applications
• Includes internal reset timeout delay to ensure stable power-up sequencing

Applications

• Microprocessor and digital system power supply monitoring
• Battery-operated electronic devices requiring low-power supervision
• Embedded systems needing reliable power-on reset generation

Procurement Notes

Verify the specific suffix D3 against official datasheets to confirm the exact threshold voltage and output type, as variations exist within the MAX6332 family. Confirm RoHS compliance status and lead times directly with authorized distributors or Analog Devices, as availability may vary by region and production lifecycle stage.

Selection Notes

Select this part when an active-high reset output is required, distinguishing it from the active-low variants like the MAX6333. Ensure the 1.8V threshold aligns with the monitored rail's minimum operating voltage. Verify that the push-pull drive capability meets the load requirements of the connected controller without external pull-ups.

Part Context

This component belongs to the MAX6332/MAX6333/MAX6334 series of 3-pin uPower Reset Circuits. These devices are designed to replace external components in 1.8V to 3.3V systems. The MAX6332 specifically offers an active-high output, whereas the MAX6333 provides active-low push-pull and the MAX6334 provides active-low open-drain outputs.

Replacement Considerations

Direct functional substitutes include MAX6332UR18D3+T and MAX6332UR18D3+. For active-low requirements, consider MAX6333UR18D2+T or MAX6334UR18D3+T. Verify pinout compatibility and threshold voltage accuracy before substitution.