Maxim Integrated MAX6340UK44+T Microprocessor Reset Circuits

The MAX6340UK44+T from Maxim Integrated is a compact, high-precision 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 4.4V power supply voltage.

This supervisory circuit is specifically engineered to maintain system integrity by monitoring the power supply voltage. In the event of a power failure or if the voltage drops below a predetermined threshold, the MAX6340UK44+T asserts a reset signal to the microprocessor, thereby resetting the system to a known state and preventing software execution errors. The reset signal remains asserted for a minimum timeout period after the supply voltage exceeds the reset threshold, ensuring that the system has stabilized before operation resumes.

The MAX6340UK44+T comes in an ultra-small SOT23 package, making it ideal for space-constrained applications. Despite its small size, it offers a robust set of features, including:

• Precision Monitoring: The device features a factory-set reset threshold voltage of 4.4V, suitable for systems that require a precise monitoring voltage level.
• Low Power Consumption: It is designed for low-power operation, which helps to extend battery life in portable applications.
• Manual Reset Input: A manual reset input is provided, allowing for a system reset to be triggered with an external switch or logic signal.
• Immunity to Short Vcc Transients: The MAX6340UK44+T is immune to short-duration voltage transients, ensuring reliable operation under fluctuating power conditions.
• Temperature Range: The device operates over a wide temperature range, making it suitable for various environments and applications.

With its tight reset threshold accuracy and built-in debounce circuitry, the MAX6340UK44+T is an excellent choice for critical applications that require high system reliability, such as portable/battery-powered equipment, computers, controllers, and intelligent instruments. Maxim Integrated's commitment to quality and reliability ensures that this reset circuit will provide a dependable safeguard for your digital system.