MAX6334UR16D3+T

Overview

The MAX6334UR16D3+T is a microprocessor supervisory circuit from the MAX6332/MAX6333/MAX6334 series, manufactured by Analog Devices Inc./Maxim Integrated. It monitors power supplies in 1.8V to 3.3V systems. The device features an active-low open-drain RESET output and asserts a reset signal when the VCC supply voltage declines below a preset threshold of 1.6V. It maintains the reset assertion for a timeout period after VCC rises above the threshold. Key parameters include a maximum supply voltage of 5.5V, a typical operating current of 3.3µA, and a reset delay time of 100ms. It operates within a temperature range of -40°C to +125°C and is housed in a SOT-23-3 package.

Feature Summary

• Provides reliable system supervision by asserting a reset signal when supply voltage drops below a fixed threshold
• Features an active-low open-drain output suitable for interfacing with various logic families
• Eliminates external components and adjustments through integrated preset thresholds and timeout periods

Applications

• Microprocessor (µP) power supply monitoring in digital systems
• Battery-powered devices requiring low quiescent current
• Portable electronics needing compact surface-mount supervision

Procurement Notes

Verify the exact suffix D3+T against official datasheets to confirm the specific threshold voltage and packaging variant. Confirm RoHS compliance status as per the latest manufacturer documentation. Check for obsolescence or lifecycle changes directly with Analog Devices distributors. Ensure the open-drain output configuration matches your system's pull-up requirements. Validate thermal performance within the specified operating temperature range.

Selection Notes

Select this component when a fixed 1.6V threshold is required for low-voltage monitoring. The open-drain output necessitates an external pull-up resistor; ensure compatibility with the target logic voltage. Consider the 3.3µA quiescent current for battery life optimization. Verify that the SOT-23-3 package fits the PCB layout constraints. Compare against MAX6333 if a push-pull output is preferred instead of open-drain.

Part Context

This part belongs to the MAX633x family of ultra-low-voltage, low-power µP reset circuits. These devices are designed to increase circuit reliability by eliminating external components. The MAX6334 variant specifically offers an active-low open-drain output, distinguishing it from the push-pull outputs of the MAX6332 and MAX6333 models within the same series.

Replacement Considerations

MAX6334UR16D3+T is functionally similar to MAX6334UR16D2+T but may differ in packaging or tape/reel specifications. Verify pinout compatibility before substitution. No direct public substitute part numbers are confirmed in the provided data.