Processor Supervisor 3.06V 1V to 5.5V 3-Pin SOT-23

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 5.5kO 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 VoltageMonitor for Precise, Automated Power-Fail Detection
  • Automatically Restarts a Microprocessor After Power Failure
  • Maintains Reset for 150ms After V_CCReturns to Tolerance for Processor Stabilization
  • Monitors Pushbutton for External Override
  • Active-Low Reset Output

Efficient Open-Drain Output with Internal 5.5kO 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