1. Products
  2. Power Monitor, Control, and Protection
  3. Supervisory Circuits
  4. Triple-Supply Monitors
  5. MAX6740


Features and Benefits

  • Dual-/Triple-Supply Reset Voltage Monitors
  • Precision Factory-Set Reset Thresholds for Monitoring from 0.9V to 5.0V
  • Adjustable Reset Input Down to 0.488V
  • 150ms and 1200ms (min) Reset Timeout Period Options
  • VCC1 Power-OK Output for Power-Supply Sequencing Applications (MAX6741/MAX6744)
  • Power-Fail Input/Power-Fail Output (MAX6742/MAX6745)
  • 6µA Supply Current
  • Tiny SC70 Package
  • Product Details

    The MAX6736–MAX6745 are low-power dual-/triple-voltage microprocessor (µP) supervisors. These devices assert a reset if any monitored supply falls below its factory-trimmed or adjustable threshold and maintain reset for a minimum timeout period after all supplies rise above their thresholds. The integrated dual/triple supervisory circuits significantly reduce size and power compared to separate ICs or discrete components. The low supply current of 6µA makes these devices ideal for portable equipment.

    The MAX6736/MAX6737 are dual fixed-voltage µP supervisors with a manual reset input. The MAX6738/MAX6739 have one fixed and one adjustable reset threshold and a manual reset input. The MAX6740/MAX6743 are triple-voltage µP supervisors with two fixed and one user-adjustable reset threshold inputs. The MAX6741/MAX6744 are dual-voltage µP supervisors with a power-OK (POK) output ideal for power-supply sequencing. The MAX6742/MAX6745 monitor the primary VCC supply and have an independent power-fail comparator.

    The MAX6736–MAX6745 monitor I/O supply voltages (VCC1) from 1.8V to 5.0V and core supply voltages (VCC2) from 0.9V to 3.3V with factory-trimmed reset threshold voltage options (Table 1). An external adjustable RSTIN input option allows monitoring voltages down to 0.5V.

    A variety of push-pull or open-drain reset outputs along with manual reset input and power-fail input/output features are available (see the Selector Guide). The MAX6736–MAX6745 are offered in a space-saving 5-pin SC70 package and operate over the -40°C to +85°C temperature range.


    • Controllers
    • GPS Equipment
    • Multivoltage Systems
    • Notebook Computers
    • PDAs
    • Portable Battery-Powered Equipment
    • POS Equipment

    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.

    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.View our quality and reliability program and certifications for more information.

    Part Number Material Declaration Reliability Data Pin/Package Drawing CAD Symbols, Footprints & 3D Models
    MAX6740XKSDD3+ Material Declaration Reliability Data 5-SC70-N/A
    MAX6740XKSDD3+T Material Declaration Reliability Data 5-SC70-N/A
    MAX6740XKSYD3+ Material Declaration Reliability Data 5-SC70-N/A
    MAX6740XKSYD3+T Material Declaration Reliability Data 5-SC70-N/A
    MAX6740XKVDD3+ Material Declaration Reliability Data 5-SC70-N/A
    MAX6740XKVDD3+T Material Declaration Reliability Data 5-SC70-N/A
    MAX6740XKVFD3+ Material Declaration Reliability Data 5-SC70-N/A
    MAX6740XKVFD3+T Material Declaration Reliability Data 5-SC70-N/A
    MAX6740XKZGD3+ Material Declaration Reliability Data 5-SC70-N/A
    MAX6740XKZGD3+T Material Declaration Reliability Data 5-SC70-N/A
    Wafer Fabrication Data MAX6740 Reliability Data

    Sample & Buy

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