The MAX809JTR from ON Semiconductor is a compact, highly efficient microprocessor (µP) supervisory circuit designed to monitor power supplies in digital systems. It provides a significant level of protection to ensure that the system operates reliably by resetting the microprocessor during power-up, power-down, and brown-out conditions. This essential component is widely used in a variety of applications, including computers, controllers, intelligent instruments, and portable/battery-powered products.

Key Features:

• Precision Monitoring: Features a precise factory-trimmed threshold voltage for accurate monitoring of the power supply.
• Low Power Consumption: Designed for low power consumption, drawing minimal current from the power supply, making it ideal for power-sensitive applications.
• Manual Reset Input: Includes a manual reset input that allows the user to initiate a system reset.
• Reset Timeout: Offers a 140 ms minimum power-on reset timeout period that ensures the system microprocessor starts up properly.
• Reset Output: The active-low RESET output remains asserted for the timeout period after VCC returns to an in-tolerance condition or after a manual reset.
• Temperature Range: Operates over a wide temperature range, making it suitable for various environments.
• Compact Package: Available in a space-saving SOT-23 package, which is ideal for use in space-constrained applications.

Applications:

The MAX809JTR is versatile and can be integrated into a diverse range of systems. Its primary function is to monitor the system voltage and keep the microprocessor reset until the system voltage has stabilized. This makes it an essential component for applications where reliable operation is critical, such as:

• Embedded systems
• Microcontroller-based applications
• Computers and computer peripherals
• Intelligent instruments
• Portable and battery-powered equipment

With its combination of features, the ON Semiconductor MAX809JTR is a robust solution for ensuring the stability and reliability of electronic systems through effective power monitoring and microprocessor reset functions.