Maxim Integrated MAX6326UR31-T Microprocessor Supervisory Circuit

The MAX6326UR31-T from Maxim Integrated is a highly reliable microprocessor (µP) supervisory circuit designed to monitor power supplies in µP and digital systems. It provides a significant level of system reliability and accuracy required in critical applications, ensuring that systems operate optimally under various conditions.

This supervisory circuit is part of the MAX6326 series, which offers factory-trimmed reset thresholds suitable for monitoring 3V, 3.3V, and 5V power supplies. The precision voltage monitoring feature of the MAX6326UR31-T safeguards µPs by ensuring that all voltage levels are within acceptable thresholds before allowing the system to start up or resume operation from a low-power state.

The MAX6326UR31-T has a fixed reset threshold of 3.08V, which is tailored for 3.1V-powered systems. It boasts an impressive low supply current of only 1.2µA, making it an energy-efficient choice for portable and battery-operated devices. The device is available in a compact SOT23-3 package, making it suitable for space-constrained applications.

Key features of the MAX6326UR31-T include:

• Factory-trimmed V<sub>CC reset threshold of 3.08V suitable for 3.1V power supplies
• Low supply current of 1.2µA for energy-saving operation
• 150ms minimum power-on reset pulse width which ensures proper system reset
• Immune to short V<sub>CC transients to prevent false resets
• Capable of operating over a wide temperature range of -40°C to +85°C
• Compact SOT23-3 packaging

The MAX6326UR31-T also features a manual reset input that allows for a system reset to be initiated by external hardware or software, providing an additional layer of control. Its ability to reject fast transient glitches on the V<sub>CC line ensures that the system remains stable and does not reset unnecessarily due to brief power disturbances.

Overall, the Maxim Integrated MAX6326UR31-T microprocessor supervisory circuit is a critical component for system designers looking to enhance system reliability and performance. Its precision monitoring capabilities and low power consumption make it an ideal choice for a wide range of applications, including portable devices, computers, controllers, and intelligent instruments.