Maxim Integrated MAX6805US46D3+T Microprocessor Reset Circuit

The Maxim Integrated MAX6805US46D3+T is a compact, highly reliable microprocessor (µP) supervisory circuit designed to monitor power supplies in digital systems. It provides a crucial function by ensuring that the µP and its peripherals are reset properly during power-up, power-down, or brown-out conditions. This tiny device is an essential component for maintaining system integrity and preventing code execution errors due to insufficiently stable system voltages.

Encased in a space-saving SOT-143 package, the MAX6805US46D3+T is particularly suitable for portable and space-constrained applications. It features a factory-trimmed reset threshold voltage of 4.63V, which makes it ideal for 5V-powered systems. The reset output is active low and remains asserted for a minimum of 140ms after the supply voltage exceeds the reset threshold, ensuring the system has ample time to stabilize before the µP begins operation.

One of the key advantages of the MAX6805US46D3+T is its low power consumption, drawing a quiescent current of only 1.6µA, which is highly beneficial for battery-operated devices. Moreover, the device's immunity to short voltage transients on the VCC line helps to prevent false resets, further enhancing system reliability.

Additional features of the MAX6805US46D3+T include:

• Debounced manual reset input, allowing for a manual system reset.
• An ability to operate over a wide temperature range of -40°C to +125°C, suitable for industrial applications.
• High reset output sink current capability, which is compatible with most microprocessors and microcontrollers.

With its combination of features, the MAX6805US46D3+T is an excellent choice for managing system resets in a wide range of applications, from consumer electronics to automotive systems. Designers and engineers can rely on this reset circuit to enhance the operational stability and reliability of their digital systems, ensuring proper functionality under various power conditions.

Whether you're working on a new design or updating an existing system, the Maxim Integrated MAX6805US46D3+T offers a straightforward and effective solution for voltage monitoring and system reset management.