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ETC811

Micrel
Part Number ETC811
Manufacturer Micrel
Description (ETC812) Microprocessor Reset Circuits
Published Jul 4, 2005
Detailed Description MIC811/812 Micrel MIC811/812 Microprocessor Reset Circuits Final Information General Description The MIC811 and MIC81...
Datasheet PDF File ETC811 PDF File

ETC811
ETC811

Overview
MIC811/812 Micrel MIC811/812 Microprocessor Reset Circuits Final Information General Description The MIC811 and MIC812 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 or /MR is forced low.
Several different reset threshold levels are available to accommodate 3V, 3.
3V or 5V powered systems.
The MIC811 has an active low /RESET output, while the MIC812 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 designed reset threshold level.
The MIC811/812 comes in a 4-pin SOT-143 package.
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 • 140ms minimum reset pulse width available • 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 MIC811LU MIC811MU MIC811JU MIC811TU MIC811SU MIC811RU MIC812LU MIC812MU MIC812JU MIC812TU MIC812SU MIC812RU Marking KL KM KJ KT KS KR LL LM LJ LT LS LR 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 Operating Temp.
Range –40°C to +85°C –40°C to +85°C –40°C to +85°C –40°C to +85°C –40°C to +85°C –40°C to +85°C –40°C to +85°C –40°C to +85°C –40°C to +85°C –40°C to +85°C –40°C to +85°C –40°C to +85°C Package 4-lead SOT-143 4-lead SOT-143 4-lead SOT-143 4-lead SOT-143 4-lead SOT-143 4-lead SOT-143 4-lead SOT-143 4-lead SOT-143 4-lead SOT-143 4-lead SOT-143 4-lead SOT-143 4-lead SOT-143 Typical Application VCC VCC MIC811 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.
mic...


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