DS1818

PRODUCTION

3.3V EconoReset with Pushbutton

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Overview

  • 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

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.

DS1818
3.3V EconoReset with Pushbutton
DS1818: Block Diagram
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