Maxim Integrated MAX6805US31D3+T Microprocessor Reset Circuit

The MAX6805US31D3+T from Maxim Integrated is a compact, highly-reliable microprocessor (µP) supervisory circuit designed to monitor power supplies in µP and digital systems. It provides a significant function by ensuring that the µP resets cleanly during power-up, power-down, and brown-out conditions. The MAX6805US31D3+T is an essential component for systems that require a high level of reliability and precision operation.

With its precision factory-set V<sub>CC reset threshold voltage, the device guarantees accurate monitoring of the system voltage. This particular model, the MAX6805US31D3+T, has a preset threshold voltage of 3.1V, making it ideal for 3.3V-powered systems. It is tailored to maintain system integrity by asserting a reset signal whenever the V<sub>CC supply voltage drops below the 3.1V threshold. The reset output remains asserted for a minimum timeout period after V<sub>CC rises above the reset threshold, ensuring a proper system reset. The minimum timeout period for the reset deassertion is 140ms, which provides ample time for the system to stabilize.

The device comes in a compact SOT-23 package, which is both space-saving and suitable for high-density circuit board designs. Its small size is particularly beneficial in portable or space-constrained applications. The MAX6805US31D3+T operates over a wide temperature range of -40°C to +125°C, allowing it to be used in various environments, from commercial to automotive applications.

For added convenience, the MAX6805US31D3+T features a low supply current of only 1.6µA, making it an energy-efficient choice for battery-operated devices. It is also designed with an active-low, push-pull reset output, which provides a direct interface to a microcontroller with minimal external components required.

In summary, the Maxim Integrated MAX6805US31D3+T is a robust and precise reset circuit that ensures reliable operation of microprocessor-based systems. Its precision voltage monitoring, low power consumption, and small form factor make it an excellent choice for a wide range of applications where system stability and integrity are of paramount importance.