3.3V EconoReset with Pushbutton

The DS1813 (5V) and DS1818 (3.3V) EconoResets are simple three-pin voltage monitors and power-on resets that hold reset for 150ms for stabilization after power returns to tolerance. The voltage monitor uses precision temperature reference and comparator circuits that detect out-of-tolerance conditions and generate an active low reset.

The DS1818 has an open-drain output with an internal 5.5kΩ pull-up resistor for use in a wired-AND circuit. The DS1818 also monitors a pushbutton on the reset output, generating a reset when the pushbutton is released.

EconoResets replace discrete components and save space, particularly in the new SOT-23 package. They can benefit any system that requires reliable processor operation, especially consumer products like printers, HVAC, energy management, cellular telephones, PDAs, and set-top boxes.

* Improves Reliability of Processor Operation

* Temperature-Compensated Voltage Monitor for Precise, Automated Power-Fail Detection

* Automatically Restarts a Microprocessor After Power Failure

* Maintains Reset for 150ms After VCC Returns to Tolerance for Processor Stabilization

* Monitors Pushbutton for External Override

* Active-Low Reset Output

* Efficient Open-Drain Output with Internal 5.5kΩ Pullup Resistor Saves Power and Space

* 35µA (max) Quiescent Current

* Allows for Easy Design with No Complicated Settings

* Fixed 3.3V Reset Threshold

* 5%, 10%, and 20% Tolerance Versions Available

* Operates in Most Commercial and Industrial Environments

* -40°C to +85°C Operating Temperature Range

* MXD1818 Offers Improved Performance over the DS1818