The Maxim Integrated MAX6801UR29D2 is a compact, highly reliable 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 that require a reset. This device is particularly useful in managing system errors and failures, ensuring that the µP resets to a known state during power-up, power-down, or brown-out conditions.

The MAX6801UR29D2 operates by monitoring the VCC voltage. It asserts a reset signal whenever the VCC supply voltage falls below a preset threshold of 2.925V, keeping it asserted for at least 140ms after VCC has risen above the reset threshold. This reset delay ensures that the system has enough time to stabilize before the processor starts executing code.

This device features a low supply current of 1.2µA, which is ideal for portable battery-operated equipment. Its low power consumption contributes to the extended battery life of the overall system. The MAX6801 series is available in a variety of threshold voltages suitable for 5V, 3.3V, and 3V systems, making the MAX6801UR29D2 a versatile choice for different applications.

Housed in a compact SOT-23 package, the MAX6801UR29D2 is designed for space-constrained applications. Its small footprint does not compromise its performance and is perfect for use in portable devices, computers, controllers, and intelligent instruments where space is at a premium.

The active-low RESET output of the MAX6801UR29D2 is guaranteed to be in the correct state for VCC down to 1.0V, which allows the device to function reliably over a wide range of supply voltages. The integration of a reset circuit like the MAX6801UR29D2 can significantly enhance the robustness and stability of a microprocessor-based system, safeguarding it against unpredictable power supply variations.