MAX6337US22D3+T

Overview

The MAX6337US22D3+T is a microprocessor supervisory circuit designed for 1.8V to 3.3V systems. It monitors the VCC supply voltage and asserts an active-low reset signal when the voltage drops below a preset threshold of 2.2V or upon manual reset assertion. The device features an open-drain output, a minimum reset timeout period of 150ms, and operates within a temperature range of -40°C to +125°C. It is housed in a surface-mount SOT-143-4 package.

Feature Summary

• Provides precise monitoring of power supply voltages to ensure system reliability
• Includes a debounced manual-reset input for user-initiated control
• Features an open-drain active-low RESET output compatible with various logic families

Applications

• Microprocessor (µP) power supply supervision
• Digital system voltage monitoring
• Portable electronic devices requiring low-power reset circuits

Procurement Notes

Verify the specific suffix D3 against official documentation to confirm the 2.2V threshold and open-drain configuration. Confirm RoHS compliance status as indicated by the '+' suffix. Check current availability status, as this component may be discontinued or subject to limited supply constraints from Analog Devices/Maxim Integrated.

Selection Notes

Select this component for applications requiring an active-low reset with an open-drain output interface. Ensure the design accommodates the 150ms minimum reset timeout after voltage recovery. Verify that the 2.2V threshold aligns with the target system's operating voltage requirements and that the SOT-143-4 package fits the PCB layout constraints.

Part Context

This part belongs to the MAX6335/MAX6336/MAX6337 family of ultra-low-voltage, low-power µP reset circuits. While sharing similar functionality, the MAX6337 is distinguished by its open-drain output and guaranteed correct state down to 1.0V, whereas the MAX6336 uses a push-pull output and guarantees state down to 0.7V.

Replacement Considerations

The MAX6336US22D3+T offers identical electrical specifications but utilizes a push-pull output instead of open-drain. The MAX6335US22D3+T provides an active-high output. Direct pin-compatible substitution requires verifying output stage compatibility with the downstream circuit.