ON Semiconductor CAT1021LI-30-G Supervisory Circuit

The CAT1021LI-30-G is a high-performance supervisory circuit designed by ON Semiconductor, renowned for its reliability and precision. This component is an essential solution for managing microprocessor (µP) systems, ensuring that the system’s integrity is maintained during power-up, operation, and power-down sequences. The CAT1021LI-30-G is particularly well-suited for battery-powered devices, portable electronics, and systems that require a stable and reliable operation over a wide range of environmental conditions.

This supervisory circuit features a precision power supply voltage monitor with a programmable delay timer. The threshold voltage for the CAT1021LI-30-G is factory-programmed to 3.0V, making it ideal for 3.3V power supply systems. The device monitors the power supply voltage and keeps the microprocessor in reset until the system voltage has stabilized. If the supply voltage drops below the threshold, the reset signal is issued to prevent system errors and data corruption.

The CAT1021LI-30-G also includes a watchdog timer that can be disabled if not required by the application. The watchdog timer ensures that the µP system operates correctly by monitoring the µP activity. If the µP fails to provide a periodic signal to the watchdog timer, a system reset is initiated, which helps to recover from a software lock-up or other faults.

The device is offered in a compact 8-lead SOIC package, which makes it easy to integrate into various designs without taking up significant board space. It operates over a wide temperature range from -40°C to +85°C, ensuring functionality in diverse environments.

Key features of the CAT1021LI-30-G include:

• Power supply voltage monitor with 3.0V threshold
• Programmable reset signal delay
• Watchdog timer with disable function
• Low power consumption
• Wide operating temperature range
• Compact 8-lead SOIC package

Overall, the CAT1021LI-30-G from ON Semiconductor is a robust and versatile supervisory circuit that offers enhanced system reliability for a wide array of electronic applications.