Maxim Integrated MAX6864UK22D3L+ Microprocessor Reset Circuit

The Maxim Integrated MAX6864UK22D3L+ is a robust microprocessor (µP) supervisory circuit designed to monitor power supplies in digital systems. It provides excellent circuit reliability and low cost by eliminating external components and adjustments when used in systems with a 2.2V power supply voltage. This compact device is ideal for portable and battery-powered applications due to its small size and low power consumption.

The MAX6864UK22D3L+ ensures that the µP and its peripherals are reset properly during power-up, power-down, or brown-out conditions. The reset output remains asserted for a preset timeout period after VCC has risen above the reset threshold, providing the system with a stable interval to allow for proper startup. The reset threshold voltage for this particular device is precisely set at 2.2V, ensuring compatibility with specific system requirements.

Key features of the MAX6864UK22D3L+ include:

• Immunity to short VCC transients
• Low power consumption, making it suitable for battery-operated equipment
• A preset reset timeout period of 140ms (min) that provides a reliable reset output
• Manual reset capability allowing for a system reset via an external button or signal
• Compact SOT-23 packaging that saves space on printed circuit boards

The device also offers an active-low reset output, which ensures compatibility with a wide range of microprocessors and digital systems that require an active-low signal to initiate a reset. This makes the MAX6864UK22D3L+ a versatile choice for many applications.

With its built-in features, the MAX6864UK22D3L+ from Maxim Integrated provides a simple and effective solution for system monitoring without the need for external resistors or capacitors, which simplifies the design and reduces the overall bill of materials. Whether used in complex computing systems or simple consumer electronics, this reset circuit helps maintain system integrity and prevents data corruption during power instability.

For designers and engineers looking for a reliable reset circuit that is easy to integrate into their systems, the MAX6864UK22D3L+ offers a combination of performance, compactness, and ease of use that is hard to match.