DS1818 查看數據表（PDF） - Maxim Integrated
零件编号
产品描述 (功能)
生产厂家
DS1818 Datasheet PDF : 6 Pages
| |||
DS1818
3.3V EconoReset with Pushbutton
BENEFITS AND FEATURES
• Improves Reliability of Processor Operation
o Temperature-Compensated Voltage
Monitor for Precise, Automated Power-
Fail Detection
o Automatically Restarts a Microprocessor
After Power Failure
o Maintains Reset for 150ms After VCC
Returns to Tolerance for Processor
Stabilization
o Monitors Pushbutton for External
Override
o Active-Low Reset Output
• Efficient Open-Drain Output with Internal
5.5kΩ Pullup Resistor Saves Power and Space
o 35µA (max) Quiescent Current
• Allows for Easy Design with No Complicated
Settings
o Fixed 3.3V Reset Threshold
o 5%, 10%, and 20% Tolerance Versions
Available
• Operates in Most Commercial and Industrial
Environments
o -40°C to +85°C Operating Temperature
Range
• MXD1818 Offers Improved Performance over
the DS1818
PIN ASSIGNMENT
3
DALLAS
DS1818
Econo
Reset
123
1
2
TOP VIEW
SOT-23 PACKAGE
See Mech.
Drawings Section
On Website
123
BOTTOM VIEW
TO-92 PACKAGE
See Mech.
Drawings Section
On Website
PIN DESCRIPTION
TO-92
1 RST
2 VCC
3 GND
Active Low Reset Output
Power Supply
Ground
SOT-23
1 RST
2 VCC
3 GND
Active Low Reset Output
Power Supply
Ground
DESCRIPTION
The DS1818 EconoReset uses a precision temperature-compensated 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.
The DS1818 also monitors a pushbutton on the reset output. If the reset line is pulled low, a reset is
generated upon release and the DS1818 output will be held in reset output low for typically 150 ms.
1 of 5
19-7559; Rev 1; 3/15
Share Link: 