Maxim Integrated MAX812JEUS Microprocessor Supervisory Circuit

The Maxim Integrated MAX812JEUS is a compact, highly efficient microprocessor (µP) supervisory circuit designed to monitor power supplies in µP and digital systems. It provides excellent circuit reliability and low cost by eliminating external components and adjustments when used with 5V-powered circuits.

This supervisory circuit ensures that the µP is fully reset during power-up, power-down, and brown-out conditions. The MAX812JEUS comes in a compact SOT-143 package, which is ideal for space-constrained applications. The device integrates features such as a manual reset input, a reset timeout delay, and a power-fail comparator, all of which contribute to a robust power management solution for sophisticated electronic systems.

Key Features:

• Precision Monitoring: The MAX812JEUS keeps a watchful eye on the system voltage, providing a precise monitoring circuit that ensures the system operates within the acceptable voltage range.
• Power-On Reset: The device generates a reset signal when the supply voltage drops below the reset threshold, ensuring the µP starts in a known state.
• Manual Reset Capability: An external input is available for initiating a system reset, allowing for greater control and diagnostic capabilities.
• Reset Timeout: After the supply voltage returns to an acceptable level, the reset signal is kept active for a preset timeout period to allow the system to stabilize.
• Power-Fail Comparator: An additional comparator is included to monitor a second voltage, which can be used as an early warning system for impending power failure.
• Low Power Consumption: Designed for energy efficiency, the MAX812JEUS helps in reducing the overall power consumption of the system.
• Compact Form Factor: The small SOT-143 package makes it easy to fit into tight spaces on PCBs.

Applications for the MAX812JEUS include computers, controllers, intelligent instruments, critical µP power monitoring, and portable/battery-powered equipment. Its ease of integration and comprehensive set of features make it a versatile choice for managing system integrity across a variety of digital applications.

By choosing the Maxim Integrated MAX812JEUS, designers can ensure their systems are protected from erratic behavior caused by unstable power supplies, thus enhancing the reliability and performance of their electronic products.