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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
§ 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
PIN DESCRIPTION
TO-92
1 RST Active High Reset Output
2 V
CC
Power Supply
3 GND Ground
SOT-23
1 RST Active High Reset Output
2 V
CC
Power Supply
3 GND Ground
DESCRIPTION
The DS1817 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.
DS1817
Active High 3.3V EconoReset
www.maxim-ic.com
12
TOP VIEW
SOT-23 PACKAGE
See Mech.
Drawings Section
On Website
1 2 3
1 2 3
BOTTOM VIEW
TO-92 PACKAGE
See Mech.
Drawings Section
On Website
DALLAS
DS1817
Econo
Reset
