MAX6337US23D1+T

Overview

The MAX6337US23D1+T is a microprocessor supervisory circuit from the MAX6337 series, manufactured by Analog Devices Inc. (Maxim Integrated). It operates within a supply voltage range of 1.8V to 5.5V and features a fixed threshold voltage of 2.3V with an overvoltage threshold of 2.34V. The device provides one monitored input and delivers an active-low, open-drain reset output. It includes a manual reset function but lacks a watchdog timer or battery backup switching. The reset delay time is 150ms, and the typical operating supply current is 3.3µA. It is housed in a SOT-143-4 package and supports surface-mount installation across a temperature range of -40°C to +125°C.

Feature Summary

• Provides precise monitoring of power supply voltages for microprocessor and digital systems
• Features a debounced manual-reset input for user-initiated system control
• Delivers an active-low, open-drain reset signal when supply voltage drops below the preset threshold

Applications

• Microprocessor (µP) power supply supervision in embedded systems
• Digital system voltage monitoring where low power consumption is critical
• Applications requiring manual reset capability alongside automatic voltage supervision

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels due to limited availability status. Confirm RoHS compliance details and specific manufacturing lot codes against official datasheet specifications. Ensure the ordering suffix matches the required package and temperature grade. Cross-reference part numbers carefully as similar variants exist within the MAX6337 family with different output types or thresholds.

Selection Notes

Select this component when an active-low, open-drain reset output is required for interfacing with compatible logic families. The fixed 2.3V threshold suits systems powered by 2.5V or 3.3V rails where brownout protection is necessary. Consider the 3.3µA quiescent current for battery-operated designs. Verify that the open-drain output configuration aligns with the pull-up requirements of the target microprocessor reset pin.

Part Context

This part belongs to the MAX6335/MAX6336/MAX6337 family of ultra-low-voltage, low-power µP reset circuits. These devices are designed to increase circuit reliability by eliminating external components. The MAX6337 variant specifically offers an open-drain output, distinguishing it from the push-pull outputs of the MAX6335 and MAX6336 models within the same package and feature set.

Replacement Considerations

MAX6337US22D3-T: Similar open-drain output with a 2.2V threshold. MAX6337US25D3-T: Similar open-drain output with a 2.5V threshold. MAX6336US23D3+T: Push-pull output variant with identical 2.3V threshold and package.