MAX6334UR22D3-T

Overview

The MAX6334UR22D3-T is a microprocessor supervisory circuit manufactured by Analog Devices/Maxim Integrated. It monitors a single supply voltage with a precise 2.2V threshold, asserting a reset signal when the input drops below this level. The device features an open-drain output and operates within a supply voltage range up to 5.5V. Designed for ultra-low-voltage applications, it ensures system reliability by maintaining the reset assertion until the supply voltage stabilizes above the threshold.

Feature Summary

• Monitors a single power supply voltage with a fixed 2.2V threshold
• Provides an open-drain reset output for flexible interfacing
• Operates at ultra-low voltages suitable for portable digital systems

Applications

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

Procurement Notes

Verify component status as the MAX6334UR22D3-T is listed as obsolete and no longer manufactured by Analog Devices/Maxim Integrated. Confirm availability through authorized distributors or secondary markets if sourcing is required. Ensure compatibility with replacement parts such as the MAX6334UR23D3+T if design flexibility allows. Check datasheet revisions for any specific handling or storage requirements associated with legacy components.

Selection Notes

Select this component for applications requiring a simple, low-cost supervisor for a single 2.2V rail. The open-drain output requires an external pull-up resistor. Consider the MAX6334 series variants if different thresholds or active-high outputs are needed. Verify that the operating temperature range meets the application's environmental specifications. Ensure the package type matches the PCB layout constraints.

Part Context

The MAX6334UR22D3-T belongs to the MAX6332/MAX6333/MAX6334 family of 3-pin, ultra-low-voltage, low-power µP reset circuits. These devices monitor power supplies in 1.8V to 3.3V systems. The MAX6334 specifically offers an active-low, open-drain RESET output, distinguishing it from the push-pull outputs of the MAX6332 and MAX6333. This family eliminates external components and adjustments to increase circuit reliability.

Replacement Considerations

Public confirmed substitute part numbers include MAX6334UR23D3+T. Verify pinout and electrical characteristics match before substitution.