SE811 Datasheet, PDF (1/8 Pages) Seaward Electronics Inc. – 4-Pin Microprocessor Reset Monitor

4-Pin Microprocessor Reset Monitor
(Preliminary)
SE811
Description
The SE811 is a cost-effective system
supervisor Integrated Circuit (IC) designed to
monitor V_CC 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 SE811 also provides
a manual reset input.
The reset output is driven active within 20μsec
of V_CC falling through the reset voltage threshold.
Reset is maintained active after V_CC rises above the
RESET threshold. The SE811 has an active-low
RESET output. The output of the SE809 is
guaranteed valid down to V_CC=1V.
The SE811 is characterized for operation from
-40^oC to 125^oC, junction temperature. The SE811 is
optimized to reject fast transient glitches on the V_CC
line. Low supply current of 7μA (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, 4.38, and
4.63V.
Features
¾ Precision V_CC Monitor for 2.8V, 3.0V, 3.3V, and
5.0V Supplies
¾ 150mSec typical RESET Output Delay.
¾ RESET Output Guaranteed to V_CC=1.0V
¾ Low 7μA Supply Current typical.
¾ V_CC Transient Immunity
¾ Manual reset input.
¾ 4-Pin SOT-143 Package
¾ No External Components
¾ ESD rating is 2KV(HBM).
¾ Wide Operating Temperature: -40°C to 125°C
¾ 100% Lead (Pb)-Free
Application
¾ Computers
¾ Embedded systems
¾ Battery powered equipment
¾ Critical µP power supply monitoring
Pin Configuration
TOP VIEW
GND ¹
SE811
4 Vcc
RESET 2
3 MR
SOT143
Application Diagram
Vcc
Vcc
SE811
RESET
MR
GND
Manual
Reset
Vcc
RESET
INPUT
GND
Revision 5/15/2009
Preliminary and all contents are subject to change without prior notice.
© Seaward Electronics, Inc., 2007. • www.seawardinc.com
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