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EEPROM-Programmable, Hex, Power-Supply Supervisors with an ADC

Product Details

Key Features

Simplified Block Diagram

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Key Features

  • 6 Configurable Input Voltage Detectors
    • Programmable Thresholds 0.5V to 3.05V (in 10mV Increments) or 1V to 5.8V (in 20mV Increments)
    • Primary UV and Secondary UV/OV Thresholds
  • One Configurable Watchdog Timer from 6.25ms to 102.4s
  • Configurable Active-Low RESET, Active-Low UV/Active-Low OV, and Active-Low WDO Outputs
  • Three Programmable Outputs
    • Open-Drain or Weak Pullup Active-Low RESET, Active-Low UV/Active-Low OV, and Active-Low WDO
    • Active-Low Output Logic
    • Timing Delays from 25µs to 1600ms
  • Margining Disable and Manual Reset Controls
  • Internal 1.25V Reference or External Reference Input
  • 10-Bit Internal ADC Samples the Input Voltage Detectors, VCC and Auxiliary Input
  • 512-Bit User EEPROM
    • Endurance: 100,000 Erase/Write Cycles
    • Data Retention: 10 Years
  • SMBus/I²C-Compatible Serial Configuration/Communication Interface
  • ±1% Threshold Accuracy

Applications/Uses

  • Multimicroprocessor/Voltage Systems
  • Networking Systems
  • Servers and Workstations
  • Storage Equipment
  • Telecommunication/Central Office Systems
  • Wireless Base Stations

Description

The MAX6884/MAX6885 EEPROM-configurable, multivoltage power-supply supervisors monitor six voltage-detector inputs, one auxiliary input, and one watchdog input, and feature three programmable outputs for highly configurable power-supply monitoring applications. Manual reset and margin disable inputs offer additional flexibility.

Each voltage-detector input offers a programmable primary undervoltage and secondary undervoltage/overvoltage threshold. Voltage-detector inputs IN1–IN6 monitor voltages from 1V to 5.8V in 20mV increments or 0.5V to 3.05V in 10mV increments.

Programmable outputs active-low RESET, active-low UV/active-low OV, and active-low WDO provide system resets/interrupts. Programmable output options include open-drain or weak pullup. Programmable timing delay blocks configure each output to wait between 25µs and 1600ms after their respective assertion-causing conditions have been cleared. A fault register logs condition-causing events (undervoltage, overvoltage, manual reset, etc.).

An internal 10-bit, 1% accurate ADC (MAX6884 only) converts the voltages at IN1–IN6, AUXIN, and VCC through a multiplexer that automatically sequences through all inputs every 200ms. An SMBus™/I²C-compatible serial data interface programs and communicates with the configuration EEPROM, configuration registers, internal 512-bit user EEPROM, and reads the ADC registers (MAX6884 only) and fault registers.

The MAX6884/MAX6885 are available in a 5mm x 5mm x 0.8mm 20-pin thin QFN package and operate over the extended temperature range (-40°C to +85°C).

Simplified Block Diagram

MAX6884, MAX6885: Typical Operating Circuit MAX6884, MAX6885: Typical Operating Circuit 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.