The LM809M3-2.45 is a high-quality and high-performance microprocessor supervisory circuit from Texas Instruments that monitors the power supplies in microprocessor and digital systems. It provides a reset signal to the microprocessor during power-up, power-down, and brown-out conditions, ensuring a known state during boot-up. The reset threshold level is 2.45V, making it suitable for 2.5V and 3.3V systems. The LM809M3-2.45 has a low supply current of 15µA (typical) and a manual reset input, making it ideal for battery-powered applications. It is available in the 5-pin SOT-23 package and is fully specified over the temperature range of -40°C to 85°C.