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EEPROM-Programmable, Hex/Quad, Power-Supply Sequencers/Supervisors

Product Details

Key Features

Simplified Block Diagram

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Key Features

  • Six (MAX6874) or Four (MAX6875) Configurable Input Voltage Detectors
    • One High-Voltage Input (+1.25V to +7.625V or +2.5V to +13.2V Thresholds)
    • One Voltage Input (+1.25V to +3.05V or +2.5V to +5.5V)
    • Four (MAX6874) or Two (MAX6875) Positive Voltage Inputs (+0.5V to +3.05V or +1V to +5.5V)
  • Four (MAX6874) or Three (MAX6875) General-Purpose Logic Inputs
  • Two Configurable Watchdog Timers
  • Eight (MAX6874) or Five (MAX6875) Programmable Open-Drain Outputs
    • Active-High or Active-Low
    • Timing Delays from 25µs to 1600ms
  • Margining Disable and Manual-Reset Controls
  • 4kb Internal User EEPROM
    • Endurance: 100,000 Erase/Write Cycles
    • Data Retention: 10 Years
  • I²C/SMBus-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 MAX6874/MAX6875 EEPROM-configurable, multivoltage supply sequencers/supervisors monitor several voltage detector inputs and general-purpose logic inputs, and provide programmable open-drain outputs for highly configurable power-supply sequencing applications. The MAX6874 provides six voltage monitor inputs, four general-purpose inputs, and eight programmable open-drain outputs. The MAX6875 provides four voltage monitor inputs, three general-purpose inputs, and five programmable open-drain outputs. Manual reset and margin disable inputs provide additional flexibility.

All voltage detectors offer configurable thresholds for undervoltage detection. One high-voltage input (IN1) provides detector threshold voltages from +2.5V to +13.2V in 50mV increments, or from +1.25V to +7.625V in 25mV increments. A second positive input (IN2) provides detector threshold voltages from +2.5V to +5.5V in 50mV increments, or from +1.25V to +3.05V in 25mV increments. Positive inputs (IN3-IN6) provide detector threshold voltages from +1V to +5.5V in 20mV increments, or from +0.5V to +3.05V in 10mV increments.

Programmable output stages control power-supply sequencing or system resets/interrupts. Program the open-drain outputs as active-high or active-low. Programmable timing delay blocks configure each output to wait between 25µs and 1600ms before deasserting.

An SMBus™/I²C-compatible serial data interface programs and communicates with the configuration EEPROM, the configuration registers, and the internal 4kb user EEPROM of the MAX6874/MAX6875.

The MAX6874/MAX6875 are available in a 7mm x 7mm x 0.8mm, 32-pin TQFN package and operate over the extended temperature range (-40°C to +85°C).

Simplified Block Diagram

MAX6874, MAX6875: Typical Operating Circuit MAX6874, MAX6875: 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 .