DS1811 Datasheet, PDF (1/5 Pages) Dallas Semiconductor – 5V EconoReset with Open Drain Output

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DS1811
5V EconoReset with Open Drain Output
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
Low-cost TO-92 or space saving SOT-23
packages available
Efficient open-drain output with internal
5.5 kΩ pull-up resistor
Operating temperature -40°C to +85°C
PIN ASSIGNMENT
3
1
2
SOT-23 PACKAGE
123
123
TO-92 PACKAGE
See Mech.
Drawings Section
PIN DESCRIPTION
TO-92
1 RST
2 V_CC
3 GND
Active Low Reset Output
Power Supply
Ground
SOT-23
1 RST
2 V_CC
3 GND
Active Low Reset Output
Power Supply
Ground
DESCRIPTION
The DS1811 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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