Maxim Integrated MAX6825TUK Microprocessor Supervisory Circuit

The Maxim Integrated MAX6825TUK is a precision microprocessor (µP) supervisory circuit designed to monitor power supplies in µP and digital systems. It provides excellent circuit reliability and low cost by eliminating external components and adjustments when used in systems with a 2.5V supply voltage.

This supervisory circuit ensures that the µP is reset to a known state during power-up, power-down, or brown-out conditions. The MAX6825TUK features an active-low reset output, which remains asserted for a minimum of 140ms after VCC has risen above the reset threshold. This reset timeout ensures that the system has ample time to stabilize before the processor starts executing code.

The MAX6825TUK incorporates a variety of features that make it an essential component for reliable system operation. Key features include:

• A precise factory-set VCC reset threshold at 2.5V, which ensures accurate monitoring of the supply voltage.
• Low supply current of 3µA (typical), which is ideal for power-conscious applications.
• Immunity to short VCC transients, which prevents false resets and ensures stable operation under noisy conditions.
• A compact SOT23-5 package, which saves board space and is suitable for use in space-constrained applications.

The MAX6825TUK is ideal for use in a range of applications including portable/battery-powered equipment, embedded controllers, intelligent instruments, and critical µP and µC power monitoring. This supervisory circuit is also a suitable choice for systems that require a high level of reliability and where space is at a premium.

Overall, the Maxim Integrated MAX6825TUK provides a robust and reliable solution for system designers looking to enhance the stability and performance of their power management systems. By integrating this supervisory circuit into their designs, engineers can achieve the desired level of precision and protection for their digital systems with minimal additional componentry and design complexity.