MIC1810_05 Datasheet, PDF (1/6 Pages) Micrel Semiconductor – Microprocessor Reset Circuit

MIC1810
MIC1810
Microprocessor Reset Circuit
Micrel
General Description
The MIC1810 is an inexpensive microprocessor supervisory
circuit that monitors power supplies in microprocessor 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
5%, 10%, or 15% drop in 5V powered systems.
The MIC1810 has an active low /RESET output. The reset
output is guaranteed to remain asserted for a minimum of
100ms after V_CChas risen above the designated reset thresh-
old level. The MIC1810 comes in a 3-pin SOT-23 package.
Features
• Precision voltage monitor for 5%, 10%, or 15% drop in
5V power supplies
• /RESET remains valid with V_CC as low as 1V
• 5µA supply current (typical)
• 100ms minimum reset pulse width
• No external components required
• Available in 3-pin SOT-23 package
Applications
• Portable equipment
• Intelligent instruments
• Critical microprocessor power monitoring
• Printers/computers
• Embedded controllers
Ordering Information
Part Number
MIC1810-5U
MIC1810-10U
MIC1810-15U
MIC1810-5UY
MIC1810-10UY
MIC1810-15UY
Marking*
NA
NB
NC
NA
NB
NC
Threshold
Voltage
4.62V
4.37V
4.12V
4.62V
4.37V
4.12V
*
Underbar symbol may not be to scale
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
Package
SOT-23
SOT-23
SOT-23
SOT-23
SOT-23
SOT-23
Pb-Free
No
No
No
Yes
Yes
Yes
Typical Application
VCC
VCC
MIC1810
RESET
VCC
µP
RESET
Micrel, Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 [phone] • fax + 1 [phone] • http://www.micrel.com
July 2005
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MIC1810