MIC809_15 Datasheet, PDF (1/10 Pages) Micrel Semiconductor – Microprocessor Reset Circuits

MIC809/810
Microprocessor Reset Circuits
General Description
The MIC809 and MIC810 are inexpensive microprocessor
supervisory circuits that monitor 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 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 V_CC has risen above the designated reset
threshold level. Having a push-pull output stage, the
MIC809/810 does not require a pull-up resistor at the
output. The MIC809/810 comes in a 3-pin SOT-23 and
SC-70 package.
The MIC809 is also available with a shorter reset timeout
(30ms, minimum).
Datasheets and support documentation are available on
Micrel’s web site at: www.micrel.com.
Features
• Precision voltage monitor for 3V, 3.3V, or 5V power
supplies
• /RESET remains valid with V_CC as low as 1.4V for
SOT-23 packaged part
• /RESET remains valid with V_CC as low as 1V for
SC70-packaged part
• Typically less than 15μA supply current for SOT-23
packaged part
• 5µA (typical) supply current for SC70-packaged part
• 140ms (minimum) reset pulse widths available
• Available in 3-pin SOT-23 and SC-70 package
Applications
• Portable equipment
• Intelligent instruments
• Critical microprocessor power monitoring
• Printers/computers
• Controllers
Typical Application
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel [phone] • fax + 1 [phone] • http://www.micrel.com
July 6, 2015
Revision 3.0