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ETC8114

Micrel
Part Number ETC8114
Manufacturer Micrel
Description Microprocessor Reset Circuits
Published Jul 4, 2005
Detailed Description MIC8114 Micrel MIC8114 Microprocessor Reset Circuit Final Information General Description The MIC8114 is an inexpensi...
Datasheet PDF File ETC8114 PDF File

ETC8114
ETC8114

Overview
MIC8114 Micrel MIC8114 Microprocessor Reset Circuit Final Information General Description The MIC8114 is an inexpensive microprocessor supervisory circuit that monitors the power supply in microprocessor based systems.
The function of this device is to assert a reset if the power supply drops below a designated reset threshold level or /MR is forced low.
The MIC8114 has an active low /RESET output.
The reset output is guaranteed to remain asserted for a minimum of 790ms after VCC has risen above the designated reset threshold level.
The MIC1814 comes in a 4-pin SOT-143 package.
Features • • • • • • • Precision voltage monitor for 3.
3V power supplies Specifically tailored to the AMD Elan SC400/410 /RESET remains valid with VCC as low as 1.
4V <15µA supply current 1100ms minimum reset pulse width Manual reset input Available in 4-Pin SOT-143 Package Applications • • • • • Portable equipment Intelligent instruments Critical microprocessor power monitoring Printers/computers Embedded controllers Ordering Information Part Number MIC8114TU Marking NV Operating Temp.
Range –40°C to +85°C Package 4-lead SOT-143 Typical Application VCC VCC MIC81 14 VCC µP MR RESET RESET Micrel, Inc.
• 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 944-0970 • http://www.
micrel.
com May 2003 1 MIC8114 MIC8114 Micrel Pin Configuration GND 1 4 VCC MIC81 14 RESET 2 3 MR 4-Lead SOT-143 Pin Description Pin Number 1 2 Pin Name GND /RESET Pin Function IC Ground Pin /RESET goes low if either VCC falls below the supply reset threshold voltage or if /MR is asserted.
/RESET remains asserted for one reset timeout period after both VCC exceeds the supply reset threshold voltage and /MR is deasserted.
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.
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