DS1818

3.3V EconoReset with Pushbutton


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Description

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: Block Diagram DS1818: Block Diagram Enlarge+

Key Features

  • 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

See parametric specs for Supervisors (1 Monitored Voltage) (252)


Part NumberReset Thresh.
(V)
Reset OuttRESETWatchdog FeatureSupervisor FeaturesReset Thresh. Accur.
(%)
ICC
(µA)
Package/PinsBudgetary
Price
min@ +25°CmaxSee Notes
DS1818 2.5 to 3.3
Active Low
Open Drain
85ms to 300msNo WatchdogManual Reset2.535
SOT23/3
TO92/3
$1.22 @1k

Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.
Product Reliability Reports: DS1818.pdf 
Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C   Material Composition  

Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

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