SE809 Datasheet, PDF (1/5 Pages) Seaward Electronics Inc. – 3-Pin Microprocessor Reset Monitor

3-Pin Microprocessor Reset Monitor
(Preliminary)
SE809
Description
Features
The SE809 is a cost-effective system _{¾ Precision VCC Monitor for 2.8V, 3.0V, 3.3V, and}
supervisor Integrated Circuit (IC) designed to
5.0V Supplies
monitor V_CC in digital and mixed signal systems and _{¾ 200mSec typical RESET Output Delay.}
provide a warning signal when the system power _{¾ RESET Output Guaranteed to VCC=1.0V}
supply is out of working range, and a reset signal to _{¾ Low 7μA Supply Current typical.}
the host processor when necessary. No external _{¾ VCC Transient Immunity}
components are required.
¾ Small SOT-23 Package and TO-92 Package
The reset output is driven active within 20μsec _{¾ No External Components}
of V_CC falling through the reset voltage threshold. _{¾ Wide Operating Temperature: 0°C to 85°C}
Reset is maintained active after V_CC rises above the _{¾ 100% Lead (Pb)-Free}
reset threshold. The SE809 has an active-low
RESET output. The output of the SE809 is
guaranteed valid down to V_CC=1V.
The SE809 is optimized to reject fast transient
glitches on the V_CC line. Low supply current of 18μA
(V_CC=3.3V) makes these devices suitable for battery
powered applications. The output voltages range
from 1.7V to 4.5V in 100mV increments. Standard
voltage versions are 2.30, 2.63, 2.93, 3.08, 4.0,
Application
¾ Computers
¾ Embedded systems
¾ Battery powered equipment
¾ Critical µP power supply monitoring
4.38, and 4.63V.
Pin Configuration
Application Diagram
Revision 1/7/2008
Preliminary and all contents are subject to change without prior notice.
© Seaward Electronics, Inc., 2007. • www.seawardinc.com
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