MIC809/MIC810 Microprocessor Reset Circuits

The MIC809 and MIC810 are inexpensive Microprocessor Supervisory Circuits that monitor power supplies in micro- processor based systems. The function of these devices is to assert a reset if the power supply drops below a designated reset threshold level. Several different reset threshold levels are available to accommodate 3V, 3.3V or 5V powered systems. The MIC809 has an active-low /RESET output, while the MIC810 offers an active-high RESET output. The reset output is guaranteed to remain asserted for a minimum of 140ms after V has risen above the designated reset threshold CC level. Having a push-pull output stage, the MIC809 and MIC810 does not require a pull-up resistor at the output. The MIC809 and MIC810 comes in a 3-pin SOT-23 and SC-70 package. By Micrel Semiconductor