Product Overview: MAX809TD from NXP Semiconductors

The MAX809TD is a precision microprocessor (μP) reset circuit developed by NXP Semiconductors, designed to monitor power supplies in digital systems. It provides a significant level of system reliability and accuracy required in critical electronic applications. This device is tailored to manage the reset function without the need for any external components, thereby simplifying designs and reducing overall system costs.

Featuring a highly accurate trip point that ensures a proper reset signal is generated, the MAX809TD operates with a nominal threshold voltage of 4.63V. It is capable of asserting a reset signal whenever the V<sub>CC supply voltage falls below this predefined threshold, ensuring that all parameters for a safe startup are met when power returns to acceptable levels.

The reset output from the MAX809TD is active-low and is guaranteed to be in the logic low state for V<sub>CC down to 1.0V, which is particularly beneficial for low-voltage operations. Additionally, the device boasts an impressive low supply current of 17μA (typical), making it an energy-efficient option for power-sensitive designs.

The MAX809TD comes in a compact 3-pin SOT-23 package, which is ideal for space-constrained applications. It is designed to operate over a wide temperature range of -40°C to +105°C, making it suitable for various industrial and consumer environments. Its applications span across multiple domains, including computers, controllers, intelligent instruments, portable/battery-powered products, and other embedded systems.

With its built-in hysteresis to prevent erratic resets, the MAX809TD ensures smooth operation through common noise and fluctuation scenarios. This device is a testament to NXP's commitment to providing high-quality, reliable components for the management and protection of electronic systems.

In summary, the MAX809TD is a robust, low-power, and precise reset circuit solution that offers designers a simple yet effective way to enhance system stability and reliability without incurring significant cost or space penalties.