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| SIP823 Datasheet, PDF (1/6 Pages) Vishay Siliconix – 5-Pin UP Reset Circuits with Watchdog Timer and Manual Reset | |||
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SiP823/SiP824/SiP825
Vishay Siliconix
5-Pin mP Reset Circuits with Watchdog Timer and Manual Reset
FEATURES
D Precision Power Supply Monitoring with "1.5% Accuracy
D Low Quiescent Current: 3 mA max.
D Low Threshold Voltage Temperature Coefficient: 100 ppm max.
D Guaranteed RESET Valid Dow to VCC = 1 V
D Seven Reset Threshold Options
D Small SOT23-5 Packages
D No External Components
D Power Supply Transient Immunity
APPLICATIONS
D Portable Intelligent Electronics
D Computers and Controllers
D Automotive Electronics
D Critical mP/mC Power Supply Monitoring
DESCRIPTION
The SiP823/SiP824/SiP825 series are mProcessor
supervisory circuits in a 5-pin SOT23 package, that combine
the functions of power supply and mProcessor monitoring.
If the power supply voltage drops, or has been, below a safe
level or the mProcessor shows signs of problematic inactivity,
the circuit will generate a reset signal at itâs output.
The SiP823 and SiP825 have an input to accommodate
manual reset.
Seven pre-programmed reset threshold voltage levels are
available as standard options.
Specially configured options are available upon request,
allowing for further customization of reset voltage, reset
time-out, and watchdog time-out periods.
The SiP823 has a reset output that is âactive lowâ and the
SiP824 and SiP825 have complementary outputs for both
âactive highâ and âactive lowâ resets. Both output drives are
push/pull configurations.
Space saving SOT23-5 packages and low quiescent current
make this family of products ideally suited for portable battery
operated equipment.
These circuits fully ignore fast negative VCC transients and
have valid reset output signals with power supply levels down
to 1 V.
PACKAGING AND PIN DEFINITION
SOT-23
SOT-23
SOT-23
RESET 1
GND 2
MR 3
SiP823
5 VCC
4 WDI
RESET 1
GND 2
RESET 3
5 VCC
SiP824
4 WDI
RESET 1
GND 2
RESET 3
5 VCC
SiP825
4 MR
Top View
TYPICAL APPLICATION CIRCUIT
Top View
Top View
See page 2 for ordering and marking information.
VCC
MANUAL
RESET
VCC
RESET
SiP823
MR
WDI
GND
VCC
RESET
mProcessor
I/O
GND
Document Number: 72397
S-41150âRev. B, 14-Jun-04
www.vishay.com
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