Maxim Integrated's MAX6720UTLTD3+T Supervisory Circuit

Maxim Integrated's MAX6720UTLTD3+T is a highly reliable supervisory circuit designed to monitor power supplies in microprocessor (µP) systems. This compact device provides excellent circuit reliability and low cost by eliminating external components and adjustments when used with 3V, 3.3V, and 5V powered circuits.

The MAX6720UTLTD3+T supervisory circuit comes in a small, 6-pin SOT-23 package, making it ideal for space-constrained applications. It offers a variety of features that ensure the proper functioning of the µP system by providing a reset signal to the µP during power-up, power-down, and brown-out conditions. Once V<sub>CC has reached the reset voltage threshold, the MAX6720UTLTD3+T maintains the reset output in the active state for a minimum of 140ms after V<sub>CC has risen above the reset threshold. This ensures that the µP has enough time to stabilize and start up correctly.

The device also includes a manual reset input that allows the user to trigger a reset manually. This feature is invaluable for system debugging and testing, as it provides a straightforward method to reset the system without cycling the power.

Key features of the MAX6720UTLTD3+T include:

• Accurate monitoring for 3V, 3.3V, and 5V supply voltages
• Low supply current of 6µA (typical) for energy-efficient operation
• 140ms (min) reset timeout period to ensure system stability
• Manual reset input for enhanced system control
• Guaranteed reset valid to V<sub>CC = 1V for low-voltage operation
• Immune to short V<sub>CC transients for reliable performance
• Thermal shutdown protection for added security

This supervisory circuit is suitable for a wide range of applications including computers, controllers, intelligent instruments, portable/battery-powered equipment, and embedded systems. The MAX6720UTLTD3+T's robust feature set and compact form factor make it an excellent choice for ensuring the integrity of power supply monitoring in critical systems.

Overall, the MAX6720UTLTD3+T from Maxim Integrated is a versatile and dependable solution for power supply supervision, offering both technical sophistication and practicality in a miniature package.