Maxim Integrated MAX809TEUR Microprocessor Reset Circuit

The MAX809TEUR from Maxim Integrated is a compact, highly efficient microprocessor (µP) supervisory circuit designed to monitor power supplies in digital systems. It provides a significant level of system reliability and accuracy required in critical electronic applications. This device is particularly suitable for portable and space-constrained electronics due to its small SOT-23 packaging.

One of the key features of the MAX809TEUR is its ability to assert a reset signal whenever the VCC supply voltage declines below a preset threshold, ensuring that the µP boots up in a known state. The reset output remains asserted for a period after VCC has risen above the reset threshold, providing a guaranteed reset signal duration which can be crucial for proper system recovery.

The reset threshold voltage for the MAX809TEUR is factory preset at 4.63V, which is suitable for monitoring 5V power supplies. The device is characterized for operation over a wide temperature range, making it versatile for various environmental conditions. It operates over a temperature range of -40°C to +105°C, ensuring reliable performance in both commercial and industrial settings.

With its low supply current of only 20µA (typical), the MAX809TEUR is an energy-efficient solution for systems where power conservation is paramount. This feature is especially beneficial in battery-operated devices where extending battery life is critical.

Additionally, the MAX809TEUR offers a debounced manual reset input. This allows for a manual override of the reset signal, providing an extra layer of control for system operators or during maintenance procedures.

Overall, the MAX809TEUR is a reliable and convenient solution for system designers looking to enhance the operational stability of their digital systems. Its combination of low power consumption, precision monitoring capabilities, and small form factor make it an excellent choice for a wide range of applications, including computers, controllers, intelligent instruments, and portable consumer electronics.

For detailed specifications and application guidance, designers should refer to the official datasheet provided by Maxim Integrated.