Features and Benefits

  • Monitors Three Inputs Simultaneously
    • LTC1726-5: 5V, 3.3V and ADJ
    • LTC1726-2.5: 2.5V, 3.3V and ADJ
  • ±1.5% Threshold Accuracy Over Temperature
  • Low Supply Current: 16μA Typ
  • Adjustable Reset Timeout
  • Adjustable Watchdog Timeout
  • Active Low Open-Drain Reset Output
  • Power Supply Glitch Immunity
  • Guaranteed RESET for VCC3 ≥ 1V or VCC25/VCC5 ≥ 1V
  • MS8 and SO-8 Packages

Product Details

The LTC1726 is a triple supply monitor and microprocessor supervisory circuit with adjustable reset and watchdog functions intended for systems with multiple supply voltages. The part has a common open-drain reset output with an adjustable delay. The reset and watchdog time-out periods are both adjustable using external capacitors.

Tight 1.5% accuracy specifications and glitch immunity ensure reliable reset operation without false triggering.

The RST output is guaranteed to be in the correct state for VCC5/VCC25 or VCC3 down to 1V. The LTC1726 may also be configured to monitor any one or two VCC inputs instead of three, depending on system requirements.

The low (16μA typical) supply current makes the LTC1726 ideal for power-conscious systems.

  • Desktop Computers
  • Notebook Computers
  • Intelligent Instruments
  • Portable Battery-Powered Equipment
  • Network Servers

Product Lifecycle icon-recommended Production

At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.

Tools & Simulations


LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.


Models for the following parts are available in LTspice:


Design Resources

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well.  "Zero defects" for shipped products is always our goal.

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The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.

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