1. Products
  2. Power Monitor, Control, and Protection
  3. Supervisory Circuits
  4. Single-Supply Monitors
  5. MAX6400


Features and Benefits

  • Ultra-Small 4-Bump (2 x 2) UCSP (See UCSP Reliability Section for More Details).
  • 70% Smaller Than SC70 Package
  • Ultra-Low 500nA (typ) Supply Current (MAX6400/MAX6401/MAX6402)
  • Factory-Trimmed Reset Thresholds from 2.20V to 4.63V in Approximately 100mV Increments
  • ±2.5% Threshold Accuracy -40°C to +85°C
  • Factory-Set 100ms (min) Reset Timeout Period
  • Manual Reset Input
  • Guaranteed Reset Valid to VCC = 1.0V
  • Three Reset Output Logic Options: Active-Low Push-Pull, Active-High Push-Pull, and Active-Low Open-Drain.
  • Immune to Short VCC Transients
  • No External Components

Product Details

The MAX6400–MAX6405 is a family of ultra-low power microprocessor (µP) supervisory circuits used for monitoring battery, power-supply, and regulated system voltages. Each device contains a precision bandgap reference comparator and is trimmed to specified trip threshold voltages. These devices provide excellent circuit reliability and low cost by eliminating external components and adjustments when monitoring system voltages from 2.5V to 5.0V. A manual reset input is also included.

The MAX6400–MAX6405 assert a reset signal whenever the VCC supply voltage falls below a preset threshold. These devices are differentiated by their output logic configurations and preset threshold voltages. The MAX6400/MAX6403 (push-pull) and the MAX6402/MAX6405 (open-drain) have an active-low reset (active-low RESET is logic low when VCC is below VTH). The MAX6401/MAX6404 have an active-high push-pull output (RESET is logic high when VCC is below VTH). All parts are guaranteed to be in the correct output logic state for VCC down to 1V. The reset circuits designed to ignore fast transients on VCC. The MAX6400/MAX6401/MAX6402 have voltage thresholds between 2.20V and 3.08V in approximately 100mV increments. The MAX6403/MAX6404/MAX6405 have voltage thresholds between 3.30V and 4.63V in approximately 100mV increments.

Ultra-low supply current of 500nA (MAX6400/MAX6401/MAX6402) makes these parts ideal for use in portable equipment. These devices are available in 4-bump chip-scale packages (UCSP™)


  • Cell Phones
  • MP3 Players
  • Pagers
  • PDAs
  • Portable Battery-Powered 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.

Product Recommendations

MAX6400 Companion Parts

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
MAX6400BS22+ Material Declaration Reliability Data 4-WLCSP-N/A
MAX6400BS22+T Material Declaration Reliability Data 4-WLCSP-N/A
Wafer Fabrication Data

Sample & Buy

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Buy Now Pricing

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List Pricing

(*)The 1Ku 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. authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.


Lead Times

Please see the latest communication from our CCO regarding lead times.



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