Maxim Integrated's MAX824LEUK Microprocessor Reset Circuit

The MAX824LEUK from Maxim Integrated is a highly reliable and compact microprocessor (μP) supervisory circuit designed to monitor power supplies in μP and digital systems. It provides a significant level of system reliability with its ability to reset a μP during power-up, power-down, and brownout conditions. The MAX824LEUK ensures that the μP starts up in a known state and helps to prevent system errors and malfunctions.

This supervisory circuit comes in a small SOT-23 package, making it an excellent choice for space-constrained applications. It is ideal for portable devices, such as PDAs, mobile phones, and other handheld technology, where size and reliability are critical considerations.

Key features of the MAX824LEUK include:

• Precision Monitoring: It offers a factory-trimmed reset threshold voltage, ensuring accurate monitoring of the VCC supply voltage.
• Low Power Consumption: With a low supply current of only 3.5μA (typical), it is suitable for battery-operated devices where power efficiency is paramount.
• Manual Reset Input: The inclusion of a manual reset input provides a flexible way to initiate a system reset from an external source.
• Reset Timeout: It features a 140ms minimum reset timeout delay, providing enough time for the μP to stabilize during power-up.
• Operating Voltage Range: The device operates over a wide voltage range of 1.2V to 5.5V, accommodating various system voltages.

The MAX824LEUK is designed to be highly reliable, featuring an active-low RESET output which remains asserted for the reset timeout period after VCC has risen above the reset threshold. This ensures a proper reset of the μP during power-up, power-down, and brownout conditions without false triggering.

Maxim Integrated's commitment to quality and reliability is evident in the MAX824LEUK, making it a top choice for designers who need a robust power monitoring solution for their digital systems. Whether used in consumer electronics, embedded systems, or IoT devices, the MAX824LEUK helps to enhance system stability and extend product life.