The SE809 is .
a cost-effective system
supervisor Integrated Circuit (IC) designed to
monitor Vcc in digital and mixed signal systems and
provide a warning signal when the system power
supply is out of working range, and a reset signal to
the host processor when necessary. No external
components are required.
The reset output is driven active within 20μsec
of Vcc falling through the reset voltage threshold.
Reset is maintained active after Vcc rises above the
reset threshold. The SE809 has an active-low
RESET output. The output of the SE809 is
guaranteed valid down to Vcc=1V.
The SE809 is characterized for operation from
-40°C to 85°C, junction temperature. The SE809is
optimized to reject fast transient glitches on the Vcc
line. Low supply current of 7μA (Vcc=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, 4.38, and

4.63V.

          特点

Precision Vcc Monitor for 2.8V, 3.0V, 3.3V, and .
5.0V Supplies
150mSec typical RESET Output Delay.
RESET Output Guaranteed to Vcc=1.0V
Low 7μA Supply Current typical.
Vcc Transient Immunity
Small SOT-23 Package and TO-92 Package
No External Components
ESD rating is 7KV(HBM).
Wide Operating Temperature: -40°C to 85°C
L ead (Pb)-Free

       应用

Computers
Embedded systems
Battery powered equipment
Critical μP power supply monitoring