Maxim Integrated MAX6864UK29D3L+T Microprocessor Reset Circuit

The MAX6864UK29D3L+T is a sophisticated microprocessor (µP) supervisory circuit designed by Maxim Integrated to monitor power supplies in digital systems. It provides excellent circuit reliability and low cost by eliminating the need for external components and adjustments when used in systems with a 2.93V power supply threshold.

This device is specifically engineered to maintain system integrity by monitoring the power supply voltage. It ensures that the microprocessor and other critical system components operate within specified power supply limits. In the event of a power failure or brownout condition, the MAX6864UK29D3L+T generates a reset signal to the microprocessor, effectively preventing system errors and data corruption by allowing the system to restart cleanly once normal power levels are restored.

The reset output from this device remains asserted for a minimum of 140ms after VCC has risen above the reset threshold level, ensuring that the system has sufficient time to stabilize before the processor begins operation. This feature is essential for systems that require a reliable boot-up sequence.

Key features of the MAX6864UK29D3L+T include:

• Factory-trimmed VCC reset threshold at 2.93V suitable for 3V-powered systems.
• Immune to short VCC transients.
• Low supply current of 1.6µA, which is ideal for battery-powered equipment.
• Guaranteed reset valid to VCC = 1V, which ensures functionality at lower voltages.
• Push-pull active-low RESET output, which provides a direct interface to microprocessors with an active-low reset pin.

With its SOT-23 package, the MAX6864UK29D3L+T is designed for space-constrained applications. It is also available in a variety of reset threshold voltages suitable for different applications, making it a versatile choice for designers.

This device is commonly used in portable/battery-powered devices, computers, controllers, intelligent instruments, and critical µP and µC power monitoring. By choosing the MAX6864UK29D3L+T, designers can ensure that their systems are protected from the dangers of unpredictable power supply levels, thereby enhancing product reliability and lifespan.