Maxim Integrated's MAX708MJA Microprocessor Supervisory Circuit

The MAX708MJA from Maxim Integrated is a compact, highly reliable microprocessor (µP) supervisory circuit designed to monitor power supplies in µP and digital systems. It provides a significant line of defense against system failures caused by erratic power supply behavior and is a critical component for ensuring system stability and functionality.

This supervisory circuit offers several key features that make it an essential component in any microprocessor-based system. The MAX708MJA provides a precision voltage monitor with a 4.65V threshold, ensuring that the system has a stable and adequate power supply. In the event of a power failure or brownout condition, the device asserts a reset signal to the µP, effectively safeguarding the system from data corruption and erratic behavior.

The reset output from the MAX708MJA remains asserted for a minimum timeout period of 200ms after V_CC has risen above the reset threshold level. This timeout feature ensures that the µP has ample time to initialize and stabilize before beginning operation. Additionally, the device's reset logic operates correctly down to V_CC = 1V, which allows for low-voltage operation suitable for battery-powered applications.

Another notable feature of the MAX708MJA is its low power consumption, making it ideal for power-sensitive applications. The device's quiescent current is typically 12µA, which helps to extend battery life in portable equipment. Furthermore, it is designed with a debounced manual reset input that allows for a manual system reset, providing an extra layer of system control.

For ease of integration, the MAX708MJA comes in an 8-pin CERDIP package, which is known for its durability and reliability. It is also fully compatible with the industry-standard 708 pinout, which simplifies the upgrade process from other similar supervisory circuits.

In summary, the MAX708MJA from Maxim Integrated is a versatile and robust solution for microprocessor system management, providing essential monitoring and control features to enhance system reliability and performance.