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DS1815 Datasheet

  • DS1815

  • 3.3V EconoReset with Push-Pull Output

  • Dallas   Dallas

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DS1815
3.3V EconoReset with Push-Pull Output
www.dalsemi.com
FEATURES
Automatically restarts a microprocessor after
power failure
Maintains reset for 150 ms after V
CC
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
Low-cost TO-92 or space saving surface-
mount SOT-23 packages available
Push-pull output for low current operation
Operating temperature -40擄C to +85擄C
PIN ASSIGNMENT
3
1
2
SOT-23 PACKAGE
1 2 3
1 2 3
TO-92 PACKAGE
See Mech.
Drawings Section
PIN DESCRIPTION
TO-92
1
2
3
RST
V
CC
GND
Active Low Reset Output
Power Supply
Ground
SOT-23
1
2
3
RST
V
CC
GND
Active Low Reset Output
Power Supply
Ground
DESCRIPTION
The DS1815 EconoReset uses a precision temperature reference and comparator circuit to monitor the
status of the power supply (V
CC
). When an out-of-tolerance condition is detected, an internal power-fail
signal is generated which forces reset to the active state. When V
CC
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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