ON Semiconductor MAX810 Microprocessor Reset Monitor
The ON Semiconductor MAX810 is a compact, highly efficient microprocessor (µP) supervisory circuit designed to monitor power supplies in digital systems. It provides a crucial function in ensuring system reliability by monitoring the system voltage and asserting a reset signal whenever the monitored voltage drops below a predetermined threshold. This reset signal ensures that the µP and other critical components in the system reset to a known state, thereby preventing erratic behavior or potential damage due to power supply glitches or brownouts.
The MAX810 is specifically tailored for portable and space-constrained applications, thanks to its small footprint and low power consumption. It is available in a variety of packages including the SOT-23, which is popular for surface-mounted designs. The device operates over a wide voltage range, making it suitable for monitoring 3V, 3.3V, and 5V power supplies.
Featuring a precision voltage sensor, the MAX810 is capable of detecting under-voltage conditions with high accuracy. When the input voltage falls below the factory-programmed threshold, the reset output is asserted within milliseconds, and it remains asserted for a fixed timeout period after the voltage rises above the threshold again, ensuring proper system reset. The timeout period is designed to allow the power supply and processor to stabilize before normal operation resumes.
Additional features of the MAX810 include a low supply current, which is a critical attribute for battery-powered devices where power conservation is paramount. The device also supports a manual reset input, allowing for an external push-button to initiate a system reset. This is particularly useful during development or for field service operations.
In summary, the ON Semiconductor MAX810 is an essential component for enhancing system reliability in a wide range of digital applications. Its ability to provide accurate voltage monitoring and timely system resets helps to safeguard against data corruption and operational errors due to power supply instabilities.
For designers seeking a reliable and space-efficient solution for voltage monitoring and system reset functionality, the MAX810 represents a robust choice that blends performance with practicality.
