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Dallas Semiconductor - Active High 3.3V EconoReset

Numéro de référence DS1817
Description Active High 3.3V EconoReset
Fabricant Dallas Semiconductor 
Logo Dallas Semiconductor 





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DS1817 fiche technique
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DS1817
Active High 3.3V EconoReset
FEATURES
Automatically restarts a microprocessor after
power failure
Maintains reset for 150 ms after VCC returns
to an in-tolerance condition
Reduces need for discrete components
Precision temperature-compensated voltage
reference and voltage sensor
Accurate 5%, 10% or 20% power monitoring
20% tolerance for use with 3.0-volt systems
Low-cost TO-92 or space saving surface
mount SOT-23 packages available
Push-pull active high output
Operating temperature -40°C to +85°C
PIN ASSIGNMENT
3
12
SOT-23 PACKAGE
See Mech. Drawing
123
123
TO-92 PACKAGE
See Mech. Drawing
PIN DESCRIPTION
TO-92
1 RST
2 VCC
3 GND
Active High Reset Output
Power Supply
Ground
SOT-23
1 RST
2 VCC
3 GND
Active High Reset Output
Power Supply
Ground
DESCRIPTION
The DS1817 EconoReset uses a precision temperature reference and comparator circuit to monitor the
status of the power supply (VCC). When an out-of-tolerance condition is detected, an internal power-fail
signal is generated which forces reset to the active state. When VCC returns to an in-tolerance condition,
the reset signal is kept in the active state for approximately 150 ms to allow the power supply and
processor to stabilize.
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