Maxim Integrated MAX6326UR31+T Microprocessor Supervisory Circuit

The MAX6326UR31+T from Maxim Integrated is a highly reliable microprocessor (µP) supervisory circuit designed to maintain system integrity during power failures or unexpected conditions in digital systems. This precision circuit is part of Maxim's family of supervisory circuits that provide a wide range of monitoring and control functions to safeguard µP systems.

This particular model, the MAX6326UR31+T, is characterized by its ultra-low supply current and a fixed-sense threshold voltage of 3.08V, making it an excellent choice for portable and battery-powered applications where power efficiency is critical. The supervisory circuit offers key features that are essential for system protection, such as a reset output, which ensures that the µP starts in a known state. The reset signal is asserted when the supply voltage falls below the reset threshold and remains asserted for a period after the supply voltage rises above the threshold, providing a reliable reset for the connected µP.

The MAX6326UR31+T comes in a compact SOT23-3 package, which is ideal for space-constrained applications. The tiny footprint allows for integration into systems where board space is at a premium without sacrificing functionality or reliability. In addition, its extended temperature range of -40°C to +85°C ensures performance across a broad spectrum of operating conditions.

Key features of the MAX6326UR31+T include:

• Low power consumption with ultra-low 1µA supply current
• Fixed reset threshold voltage of 3.08V tailored for 3.3V-powered systems
• Guaranteed reset valid to VCC = 1V for low-voltage operation
• 140ms min power-on reset delay ensures system stability on power-up
• Immune to short VCC transients for increased reliability
• Available in a small SOT23-3 package suitable for high-density PCB layouts

The MAX6326UR31+T supervisory circuit is a vital component for designers looking to enhance system reliability and prevent data corruption due to volatile power conditions. Its integration into a system helps ensure that microprocessors and other sensitive digital components operate within safe parameters, thus prolonging the lifespan of the product and maintaining the integrity of the system's performance.