Maxim Integrated MAX6327UR22 Precision Voltage Microprocessor Reset Circuit

The MAX6327UR22 from Maxim Integrated is a high-quality, precision voltage microprocessor (μP) reset circuit designed to monitor power supplies in digital systems. It provides a significant level of protection against low voltage conditions, ensuring that your microprocessor and other critical system components operate within safe voltage parameters. This device is particularly suitable for portable, battery-powered applications due to its low power consumption and small footprint.

Featuring a factory-trimmed reset threshold voltage of 2.2V, the MAX6327UR22 ensures that systems with a 2.5V power supply are reliably monitored, triggering a reset signal whenever the supply voltage drops below the threshold. The reset output remains active until the supply voltage recovers and stabilizes above the reset threshold, plus a built-in reset timeout period. This timeout period allows the system to recover fully before normal operation resumes, thereby preventing system instability and data corruption during transient conditions.

The device comes in a compact SOT23 package, making it an ideal choice for space-constrained applications. Its low supply current of only 1μA (typical) makes it an energy-efficient solution that minimizes the impact on battery life. The MAX6327UR22 also offers an active-low, push-pull reset output, which provides a direct interface to the reset or enable input of the microprocessor, without the need for external components.

Key features of the MAX6327UR22 include:

• Factory-set reset threshold voltage: 2.2V
• Low supply current: 1μA (typical)
• Compact SOT23 package
• Guaranteed reset valid to VCC = 1V
• ±2% Reset threshold accuracy over temperature
• Immune to short VCC transients
• No external components required

With its precision monitoring and low power consumption, the MAX6327UR22 is an excellent choice for microprocessor systems requiring a reliable and efficient voltage reset mechanism. Whether you're designing portable devices, embedded systems, or any application where power supply stability is critical, this reset circuit from Maxim Integrated will help ensure your system operates safely and effectively.