Maxim Integrated MAX6418UK26+T Microprocessor Supervisory Circuit

The Maxim Integrated MAX6418UK26+T is a highly reliable and compact microprocessor (µP) supervisory circuit designed to monitor power supplies in digital systems. It provides excellent circuit reliability and low cost by eliminating external components and adjustments when used in systems with a 2.6V power supply voltage. This supervisory circuit is ideal for portable electronics, computers, controllers, and intelligent instruments where maintaining the correct operation of the µP during power fluctuations is critical.

The MAX6418UK26+T comes in a small SOT-23 package, making it suitable for space-constrained applications. It offers key features such as a precision factory-set V<sub>CC reset threshold and an active-low, open-drain reset output. The reset signal is asserted when the V<sub>CC supply voltage falls below the reset threshold, ensuring the µP and other system components reset cleanly during power-up, power-down, or brown-out conditions. The reset output remains asserted for a minimum timeout period after V<sub>CC rises above the reset threshold, providing a guaranteed reset signal duration.

Additional features of the MAX6418UK26+T include a low supply current of only 1.5µA, which is crucial for battery-powered devices. The device's wide operating temperature range of -40°C to +125°C ensures reliable operation in extreme environments. It also supports a manual reset input, offering a convenient way to initiate a system reset without cycling the power.

For design flexibility, the MAX6418UK26+T includes a debounce circuitry that filters out input transients on the manual reset input, thereby preventing false resets. This supervisory circuit is also immune to short V<sub>CC transients, adding to its robustness in unpredictable power environments.

In summary, the Maxim Integrated MAX6418UK26+T is a versatile and dependable choice for system designers looking to enhance the reliability of their microprocessor-based systems. Its integration of key supervisory functions, low power consumption, and small footprint make it an excellent choice for a wide range of applications.