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Ultra-Low-Power Voltage Detectors and µP Supervisory Circuits

Product Details

Key Features

Parametric specs for Supervisors (1 Monitored Voltage)
Reset Thresh. (V) 1.2 to 1.8
1.8 to 2.5
2.5 to 3.3
3.3 to 5.5
Reset Thresh. Accur. (%) (@ +25°C) 2.5
Reset Out Active Low
Push-Pull
tRESET (min) 85ms to 300ms
Watchdog Feature No Watchdog
ICC (µA) (max) 3.5
Package/Pins SC70/3
SOT23/3
Budgetary
Price (See Notes)
1.69
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Simplified Block Diagram

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Parameters

Parametric specs for Supervisors (1 Monitored Voltage)
Reset Thresh. (V) 1.2 to 1.8
1.8 to 2.5
2.5 to 3.3
3.3 to 5.5
Reset Thresh. Accur. (%) (@ +25°C) 2.5
Reset Out Active Low
Push-Pull
tRESET (min) 85ms to 300ms
Watchdog Feature No Watchdog
ICC (µA) (max) 3.5
Package/Pins SC70/3
SOT23/3
Budgetary
Price (See Notes)
1.69

Key Features

  • Ultra-Low 1.0µA Supply Current
  • Preset Thresholds from +1.6V to +5.5V in 100mV Increments
  • Internal 5% Threshold Hysteresis
  • ±2.5% Threshold Accuracy Over Temperature
  • Internal Timeout Period Option (150ms min)
  • Immune to Short Voltage Transients
  • No External Components
  • Available in Three Output Options: Push-Pull (Active Low/Active High) and Open Drain (Active Low)
  • Fully Specified from -40°C to +125°C
  • Small SC70 and SOT23 Packages
  • Applications/Uses

    • Cell Phones
    • Cordless Phones
    • Load Switching/Power Sequencing
    • Noise-Immune µP Reset Circuits
    • PDAs
    • Portable Battery-Powered Equipment
    • Portable Medical Devices
    • Power-Supply Monitoring in Digital/Analog Systems
    • Precision Battery Monitoring

    Description

    The MAX6461-MAX6466 family of ultra-low-power voltage detectors and µP reset supervisory circuits monitors battery, power-supply, and system voltages. Each circuit includes a precision bandgap reference, a comparator, internally trimmed resistor networks that set specified trip thresholds, and an internal 5% threshold hysteresis circuit (see the Functional Diagram). Output is asserted when VCC falls below the internal VTH- and remains asserted until VCC rises above VTH+ (VTH+ = VTH- x 1.05). These devices provide excellent circuit reliability and low cost by eliminating external components and adjustments when monitoring nominal system voltages from +1.6V to +5.5V. The MAX6461/MAX6462/MAX6463 are voltage detectors with a propagation delay of 17µs.

    The MAX6464/MAX6465/MAX6466 are µP supervisory circuits with a minimum reset timeout period of 150ms. All devices are available with thresholds from +1.6V to +5.5V in 100mV increments.

    The family is available with three output stage options: push-pull with active-low output, push-pull with active-high output, and open drain with active-low output. These devices are available in SC70 and SOT23 packages specified over the -40°C to +125°C temperature range.

    Simplified Block Diagram

    MAX6461, MAX6462, MAX6463, MAX6464, MAX6465, MAX6466: Functional Diagram MAX6461, MAX6462, MAX6463, MAX6464, MAX6465, MAX6466: Functional Diagram Zoom icon

    Technical Docs

    Support & Training

    Search our knowledge base for answers to your technical questions.

    Filtered Search

    Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .

    Sampling:
    Selecting the Sample button above will redirect to the third-party ADI Sample Site. The part selected will carry over to your cart on this site once logged in. Please create a new account there if you have never used the site before. Contact SampleSupport@analog.com with any questions regarding this Sample Site.