MIC8114TUY TR Microchip

MIC8114 Micrel MIC8114 Microprocessor Reset Circuit General Description Features The MIC8114 is an inexpensive microprocessor supervisory Precision voltage monitor for 3.3V power supplies circuit that monitors the power supply in microprocessor Specically tailored to the AMD Elan SC400/410 based systems. /RESET remains valid with V as low as 1V CC 5A typical supply current The function of this device is to assert a reset if the power 790ms minimum reset pulse width supply drops below a designated reset threshold level or Manual reset input /MR is forced low. Available in 4-Pin SOT-143 Package The MIC8114 has an active low /RESET output. The reset output is guaranteed to remain asserted for a minimum Applications of 790ms after V has risen above the designated reset CC Portable equipment threshold level. The MIC1814 comes in a 4-pin SOT-143 Intelligent instruments package. Critical microprocessor power monitoring Printers/computers Embedded controllers Ordering Information Part Number Marking Operating Temp. Range Package Pb-Free MIC8114TU NV 40C to +85C 4-lead SOT-143 No MIC8114TUY NV 40C to +85C 4-lead SOT-143 Yes Typical Application V CC V V CC CC MIC81 14 P RESET RESET MR Micrel, Inc. 2180 Fortune Drive San Jose, CA 95131 USA tel + 1 (408) 944-0800 fax + 1 (408) 474-1000 MIC8114 Micrel Pin Conguration GND 1 4 VCC MIC81 14 RESET 2 3 MR 4-Lead SOT-143 Pin Description Pin Number Pin Name Pin Function 1 GND IC Ground Pin 2 /RESET /RESET goes low if either V falls below the supply reset threshold voltage CC or if /MR is asserted. /RESET remains asserted for one reset timeout period after both V exceeds the supply reset threshold voltage and /MR is deas- CC serted. 3 /MR Manual Reset Input. A logic low on /MR forces a reset. The reset will remain asserted as long as /MR is held low and for one reset timeout period after /MR goes high. This input can be shorted to ground via a switch or driven from CMOS or TTL logic. Pulled high internally through a 20k resistor. Float if unused. 4 V Power supply Input. CC MIC8114 2 July 2005