EEPROM-Based System Monitors with Nonvolatile Fault Memory

EEPROM-Configurable Devices Maximize Uptime in High-Reliability Systems such as Network, Telecom, and Server Equipment

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The MAX16031/MAX16032 EEPROM-configurable system monitors feature an integrated 10-bit analog-to-digital converter (ADC) designed to monitor voltages, temperatures, and current in complex systems. These EEPROM-configurable devices allow enormous flexibility in selecting operating ranges, upper and lower limits, fault output configuration, and operating modes with the capability of storing these values within the device.

The MAX16031 monitors up to eight voltages, three temperatures (one internal/two external remote temperature diodes), and a single current. The MAX16032 monitors up to six voltages and two temperatures (one internal/one remote temperature diode). Each of these monitored parameters is muxed into the ADC and written to its respective register that can be read back through the SMBus™ and JTAG interface.

Measured values are compared to the user-configurable upper and lower limits. For voltage measurements, there are two undervoltage and two overvoltage limits. For current and temperature, there are two sets of upper limits. Whenever the measured value is outside its limits, an alert signal is generated to notify the processor. Independent outputs are available for overcurrent, overtemperature, and undervoltage/overvoltage that are configured to assert on assigned channels. There are also undedicated fault outputs that are configured to offer a secondary limit for temperature, current, or voltage fault or provide a separate overvoltage output.

During a major fault event, such as a system shutdown, the MAX16031/MAX16032 automatically copy the internal ADC registers into the nonvolatile EEPROM registers that then are read back for diagnostic purposes.

The MAX16031/MAX16032 offer additional GPIOs that are used for voltage sequencing, additional fault outputs, a manual reset input, or read/write logic levels. A separate current-sense amplifier with an independent output allows for fast shutoff during overcurrent conditions. The MAX16031/MAX16032 are available in a 7mm x 7mm TQFN package and are fully specified from -40°C to +85°C.
MAX16031, MAX16032: Pin Configuration MAX16031, MAX16032: Pin Configuration Enlarge+

Key Features

  • Supply Voltage Operating Range of 2.85V to 14V
  • Monitors Up to Eight Voltages (Single-Ended or Pseudo-Differential) with 1% Accuracy
  • EEPROM-Configurable Limits
    • Two Undervoltage and Two Overvoltage
    • Two Overtemperature
    • Two Overcurrent
  • High-Side Current-Sense Amplifier with Overcurrent Output (MAX16031 Only)
  • Monitors Up to Three Temperatures (1 Internal/2 Remote)
  • Nonvolatile Fault Memory Stores Fault Conditions for Later Retrieval
  • Two Additional Configurable Fault Outputs
  • Two Configurable GPIOs
  • SMBus/I²C-Compatible Interface with Active-Low ALERT Output and Bus Timeout Function
  • JTAG Interface
  • 7mm x 7mm, 48-Pin TQFN Package


  • Networking
  • Servers
  • Storage Systems
  • Telecom
  • Workstations

MAX16031EVKIT: Evaluation Kit for the MAX16031

Tools & Models

  • MAX16031 BSDL Model
  • Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C  

    Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

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