Maxim Integrated MAX6801UR31D3 Microprocessor Reset Circuit

The Maxim Integrated MAX6801UR31D3 is a compact, high-precision 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 for system monitoring. This device is particularly suitable for portable, battery-powered applications due to its low power consumption and small footprint.

The MAX6801UR31D3 is capable of asserting a reset signal whenever the VCC supply voltage falls below a preset threshold, ensuring that the µP resets cleanly during power-up, power-down, and brown-out conditions. The reset output remains asserted for a minimum timeout period after VCC has risen above the reset threshold level, providing a guaranteed reset duration and allowing the power supply and processor to stabilize.

This device comes with a fixed reset threshold voltage of 3.1V, tailored for systems operating at standard 3.3V power supply levels. It is available in a compact SOT-23 package, making it an ideal choice for space-constrained applications. The MAX6801UR31D3 offers an active-low, push-pull reset output, which ensures compatibility with most microprocessors and microcontrollers that require an active-low reset input.

Key features of the MAX6801UR31D3 include:

• Fixed reset threshold of 3.1V suitable for 3.3V-powered systems
• Minimum 140ms reset timeout period
• Low supply current of 5.5µA (typical), ideal for battery-operated devices
• Immune to short VCC transients
• Compact SOT-23 packaging

The device is also characterized for operation over a wide temperature range, making it reliable in various environmental conditions. With its precision monitoring of the system voltage, the MAX6801UR31D3 is a critical component for enhancing the reliability of microprocessor systems, preventing firmware corruption, and ensuring stable operation across various applications, including portable devices, computers, controllers, and intelligent instruments.

Overall, the Maxim Integrated MAX6801UR31D3 offers a simple and efficient solution for system designers looking to improve the resilience and robustness of their electronic products.