DS1816R Datasheet, PDF (1/5 Pages) Dallas Semiconductor – 3.3V EconoReset with Open Drain Output

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DS1816
3.3V EconoReset with
Open Drain Output
FEATURES
§ Automatically restarts a microprocessor after
power failure
§ Maintains reset for 150ms 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 3V systems
§ Low-cost TO-92 or space saving SOT-23
packages available
§ Efficient open-drain output with internal
5kW pull-up resistor
§ Operating temperature -40°C to +85°C
PIN ASSIGNMENT
DALLAS
3
DS1816
Econo
Reset
123
123
BOTTOM VIEW
TO-92 PACKAGE
See Mech.
Drawings Section
On Website
1
2
TOP VIEW
SOT-23 PACKAGE
See Mech.
Drawings Section
On Website
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 DS1816 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 150ms to allow the power supply and
processor to stabilize.
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