Maxim Integrated's MAX814TESA+T Supervisory Circuit

The MAX814TESA+T from Maxim Integrated is a highly reliable supervisory circuit designed to monitor power supplies in microprocessor systems. It provides a significant layer of protection by ensuring that the system's voltage levels remain within acceptable thresholds, thus safeguarding the system from potential damage due to power supply fluctuations.

This compact supervisory IC is housed in an 8-pin SOIC package and operates over a wide temperature range, making it suitable for a diverse array of applications. The MAX814TESA+T is designed to be versatile, with a fixed-sense threshold voltage of 4.65V, which is ideal for 5V power supply monitoring. It is also capable of asserting a reset signal whenever the VCC supply voltage falls below the preset threshold, ensuring the microprocessor and other critical components are reset properly during power-up, power-down, and brown-out conditions.

The device features a manual reset input, allowing for an external trigger to initiate a system reset. This manual reset can be activated via a push-button or other user interface elements, providing an additional layer of control for system operators. Additionally, the MAX814TESA+T offers a 140 ms minimum power-on reset pulse width, which contributes to the reliable startup of the microprocessor by allowing adequate time for the power supply to stabilize before the system begins operation.

With its low supply current of just 15µA (typical), the MAX814TESA+T is an energy-efficient choice for battery-operated devices. Its quiescent current is minimal, which helps in prolonging battery life in portable applications. Furthermore, the device is fully specified over the temperature range of -40°C to +85°C, ensuring consistent performance in environments subject to temperature extremes.

The MAX814TESA+T supervisory circuit is an excellent choice for designers looking for a reliable, low-power solution to enhance system integrity. Its combination of features makes it well-suited for use in microprocessor systems, computers, controllers, and other sophisticated electronic equipment that require precise monitoring and control of power supply voltages.