ETC810

MIC809/810 Micrel MIC809/810 Microprocessor Reset Circuits Final Information General Description The MIC809 and MIC810 are inexpensive microprocessor supervisory circuit that monitors power supplies in microprocessor based systems. The function of this device is to assert a reset if either 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 VCC has risen above the designated reset threshold level. The MIC809/810 comes in a 3-pin SOT-23 package. The MIC809 is also available with a shorter reset timeout (30ms min.). See the MIC809-5. Features Precision voltage monitor for 3V, 3.3V or 5V power supplies /RESET remains valid with VCC as low as 1.4V <15µA supply current 20ms, 40ms, or 1100ms minimum reset pulse widths available Manual reset input Available in 3-pin SOT-23 package Applications Portable equipment Intelligent instruments Critical microprocessor power monitoring Printers/computers Controllers Ordering Information Part Number MIC809LU MIC809MU MIC809JU MIC809TU MIC809SU MIC809RU MIC810LU MIC810MU MIC810JU MIC810TU MIC810SU MIC810RU Marking IL IM IJ IT IS IR JL JM JJ JT JS JR Threshold Voltage 4.63 4.38 4.00 3.08 2.93 2.63 4.63 4.38 4.00 3.08 2.93 2.63 Opera...