The LM809M3-2.93 from Texas Instruments is a microprocessor supervisory circuit designed to monitor the power supplies in microprocessor and digital systems. It provides a reset signal for the microprocessor during power-up, power-down, and brown-out conditions, ensuring a known state during boot-up. The reset function prevents the microprocessor from executing instructions at low voltages. The LM809M3-2.93 has a threshold voltage of 2.93V, a reset output delay of 140ms, and a low quiescent current of typically 17μA. It is available in a 3-pin SOT-23 package and is RoHS compliant.