View mic1815 datasheet:

MIC1815 Micrel MIC1815 Microprocessor Reset Circuit Final Information General Description Features The MIC1815 is an inexpensive microprocessor supervisory • Precision voltage monitor for 10% or 20% drop in 3.3V circuit that monitors power supplies in microprocessor based power supplies systems. • /RESET remains valid with VCC as low as 1.4V • 9µA supply current The function of these devices is to assert a reset if the power • 100ms minimum reset pulse width supply drops below a designated reset threshold level. Sev- • No external components required eral different reset threshold levels are available to accom- • Available in 3-pin SOT-23 package modate 10% or 20% drop in 3.3V powered systems. The MIC1815 has an active low /RESET output. The reset Applications output is g