Maxim Integrated MAX818LESA Microprocessor Supervisory Circuit

The MAX818LESA from Maxim Integrated is a compact, highly integrated microprocessor (µP) supervisory circuit designed to monitor power supplies in µP and digital systems. It provides excellent circuit reliability and low cost by eliminating external components and adjustments when used in system monitoring applications. This device is ideal for portable electronics, computers, controllers, and intelligent instruments where space is at a premium and high reliability is essential.

The MAX818LESA offers a variety of features that make it a versatile choice for system management. It incorporates a precision voltage monitor with a factory-set reset threshold voltage. This ensures that the µP resets reliably on power-up, power-down, and brownout conditions. The reset output is guaranteed to remain in the active (low) state with VCC as low as 1V, which allows for a safe system shutdown during low power conditions.

This supervisory circuit also includes a manual reset input that provides a debounce filter. This feature allows for a manual system reset without the need for additional external components, further simplifying design and enhancing system reliability. The MAX818LESA has an active-low reset output, which is compatible with most microprocessors and can interface directly with the reset pin.

With its small 8-pin SO package, the MAX818LESA saves space on PCB layouts and is easy to integrate into existing designs. The device operates over a wide temperature range, making it suitable for use in various environments. It also has a low supply current, which helps to minimize power consumption, an important consideration for battery-operated devices.

Overall, the Maxim Integrated MAX818LESA microprocessor supervisory circuit is a reliable and economical solution for system monitoring, offering precision monitoring of the power supply, manual reset capability, and a small footprint. Its ease of integration and robust feature set make it an excellent choice for designers looking to enhance system stability and performance.