ON Semiconductor MC33164P-5 Microprocessor Supervisory Circuit

The ON Semiconductor MC33164P-5 is a precision voltage monitoring device designed to protect microprocessors and digital systems against the hazards of unpredictable voltage fluctuations. It is a crucial component for ensuring the reliability and stability of electronic systems, particularly in applications where voltage levels are critical to the operation and safety of the circuitry.

This supervisory circuit features a highly accurate undervoltage detection capability, which monitors the supply voltage and ensures it remains within a safe operating range. The MC33164P-5 is specifically designed to assert a reset signal whenever the VCC supply voltage falls below the preset threshold of 4.55V. It maintains the reset output until the supply voltage recovers and stabilizes above the threshold, plus a small hysteresis to prevent erratic reset operation.

The device boasts a low supply current draw, making it an energy-efficient choice for battery-powered applications. Its open-drain reset output allows for a flexible interface with other logic levels, and it can directly drive the reset pin of a microprocessor or other digital logic. The reset output remains operational with VCC as low as 1.0V, ensuring functionality during low-voltage conditions.

Enclosed in a 5-lead TO-92 package, the MC33164P-5 is designed for through-hole mounting, which is ideal for prototyping and applications where surface-mount technology is not preferred. Its operating temperature range of -40°C to +85°C makes it suitable for a wide range of environments and applications, including computers, controllers, intelligent instruments, and portable electronics.

ON Semiconductor's commitment to quality and reliability is evident in the MC33164P-5, providing engineers and designers with a trusted solution for voltage monitoring and system protection. Whether it's used in industrial control systems or consumer electronics, this supervisory circuit is a small but critical component that helps maintain the integrity and performance of complex electronic systems.