Maxim Integrated MAX823LEUK Microprocessor Supervisory Circuit

The MAX823LEUK from Maxim Integrated is a highly reliable microprocessor (μP) supervisory circuit designed to monitor power supplies and microprocessor activity in digital systems. It provides excellent circuit reliability and low cost by eliminating external components and adjustments when used in systems with a 3.3V power supply.

This supervisory circuit features a precision voltage monitor with a factory-set reset threshold of 2.93V, catering to the needs of 3.3V-powered systems. The MAX823LEUK ensures that the μP is reset to a known state during power-up, power-down, or brown-out conditions. The reset output remains asserted for a minimum of 140ms after VCC has risen above the reset threshold, providing a proper reset timing for the microprocessor.

The device comes in a compact SOT-23 package, which is ideal for space-constrained applications. Its low power consumption makes it suitable for battery-operated equipment. Additionally, the MAX823LEUK features a manual reset input that allows the user to trigger a reset with an external push-button or logic signal, offering further system control and diagnostic capabilities.

Key features of the MAX823LEUK include:

• Precision Monitoring of 3.3V Power-Supply Voltages
• Fully Specified Over Temperature
• Available in SOT-23 Package
• 140ms (min) Reset Pulse Width
• Manual Reset Input
• Low Supply Current of 20μA (typ)
• Debounced Manual Reset Input

Applications for the MAX823LEUK are diverse, encompassing systems that require reliable monitoring of the power supply and microprocessor status. It is commonly used in portable/battery-powered devices, computers, controllers, intelligent instruments, and critical μP power monitoring systems.

With its ease of integration and robust feature set, the Maxim Integrated MAX823LEUK supervisory circuit is a superior choice for designers looking to enhance the reliability and performance of their digital systems.