MIC803_15 Datasheet, PDF (1/12 Pages) Micrel Semiconductor – 3-Pin Microprocessor Supervisor Circuit with Open-Drain Reset Output

MIC803
3-Pin Microprocessor Supervisor Circuit
with Open-Drain Reset Output
General Description
The MIC803 is a single-voltage supervisor with open-drain
reset output that provides accurate power supply
monitoring and reset generation in microprocessor-based
systems. The function of the device is to assert a reset
signal if the power supply voltage drops below the reset
threshold voltage, and retain this reset for the reset
timeout period once the power supply increases above the
reset threshold voltage.
The MIC803 consumes only 4.5µA of supply current and
offers three reset delay periods of 20ms, 140ms, and
1120ms (minimum). It features factory-programmed reset
threshold levels from 2.63V to 4.63V to accommodate
3.0V, 3.3V, and 5.0V power supplies. It is available in the
compact 3-pin SC-70 and SOT-23 packages.
Datasheets and support documentation are available on
Micrel’s web site at: www.micrel.com.
Features
• 4.5μA supply current (typical) at 3.6V
• Open-drain /RESET output
• /RESET remains valid with V_CC as low as 1V
• 20ms, 140ms, or 1120ms (minimum) reset timeout
options
• 2.63V to 4.63V preset voltage threshold options
• 2.5% voltage threshold accuracy over temperature
• 3-pin SC70-3 package (2.0mm × 2.1mm)
• 3-pin SOT-23 package (2.3mm × 2.9mm)
• -40˚C to +125˚C junction temperature range
Applications
• Critical microcomputer power monitoring
• Portable equipment
• Solid state drives
• Printers/computers
• Embedded controllers
Typical Application
V_CC
V_CC
100k
MIC803
RESET
GND
V_CC
µP
RESET
GND
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel [phone] • fax + 1 [phone] • http://www.micrel.com
August 3, 2015
Revision 1.2