The MIC1815 is a Microprocessor Reset Circuit from Micrel, it monitors the power supply in microprocessor based systems and generates a reset signal when the supply voltage drops below a pre-determined reset threshold voltage. There are a number of different reset threshold voltages available to accommodate 10% or 20% drop in 3.3V powered systems. The MIC1815 has a low-level RESET output. The reset output is guaranteed to remain asserted for a minimum of 100ms after VCC has risen above the designated reset threshold level. The MIC1815 is available in a 3-lead SOT-23 package.