Maxim Integrated MAX793SESE-T Microprocessor Supervisory Circuit

The Maxim Integrated MAX793SESE-T is a highly reliable 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 in system monitoring applications. This device is particularly suitable for portable computers, controllers, and intelligent instruments where precise monitoring and control of system operation are required.

The MAX793SESE-T offers several key features that make it an essential component for system management. It includes a precision voltage monitor with a factory-set reset threshold voltage, ensuring that the µP is held in the reset state during power-up, power-down, and brownout conditions. The reset output is guaranteed to remain in the active state with VCC as low as 1.0V, providing a secure hold for the system during low voltage conditions.

This supervisory circuit also features a 200ms reset pulse width which ensures proper system reset, allowing enough time for the µP and other devices to stabilize during power-up. Additionally, the MAX793SESE-T incorporates a watchdog timer that monitors the µP activity. If the µP fails to strobe the watchdog input within the preset timeout period, the device asserts a system reset, thereby providing an extra layer of system reliability.

With its low supply current of 20µA (typical), the MAX793SESE-T is energy efficient, making it an excellent choice for power-sensitive applications. The device is available in a compact surface-mount SO package, which is ideal for space-constrained designs.

Overall, the Maxim Integrated MAX793SESE-T is a versatile and dependable solution for system monitoring, offering protection against unpredictable system behavior and enhancing the overall stability and performance of electronic systems. Its integration of key supervisory functions in a single package makes it a valuable component for designers looking to improve system reliability and reduce component count.