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Hex/Quad, Power-Supply Supervisory Circuits

Product Details

Key Features

Simplified Block Diagram

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Key Features

  • Hex/Quad Voltage Detectors
  • Undervoltage and Overvoltage Thresholds
  • 1% Threshold Accuracy
  • Margining Disable and Manual Reset Input
  • Watchdog Timer
  • Open-Drain Active-Low RESET, Active-Low OV, and Active-Low WDO Outputs
  • 180ms (min) Reset Timeout Period
  • Few External Components
  • Small 5mm x 5mm, 16-Pin Thin QFN Packages

Applications/Uses

  • Multivoltage Systems
  • Networking
  • Servers/Workstations/Storage Systems
  • Telecom

Description

The MAX6887/MAX6888 multivoltage supply supervisors provide several voltage-detector inputs, one watchdog input, and three outputs. Each voltage-detector input offers a factory-set undervoltage and overvoltage threshold. Manual reset and margin disable inputs offer additional flexibility.

The MAX6887 offers six voltage-detector inputs, while the MAX6888 offers four inputs. Output active-low RESET asserts when any input voltage drops below its respective undervoltage threshold or manual reset active-low MR is asserted. Output active-low OV asserts when any input voltage exceeds its respective overvoltage threshold. Monitor standard supply voltages listed in the Selector Guide in the full datasheet.

The MAX6887/MAX6888 offer a watchdog timer with an initial and normal timeout periods of 102.4s and 1.6s, respectively. Watchdog output active-low WDO asserts when the watchdog timer expires. Connect active-low WDO to manual reset input active-low MR to generate resets when the watchdog timer expires. RESET, OV, and WDO are active-low, open-drain outputs.

The MAX6887/MAX6888 are available in a 5mm x 5mm x 0.8mm, 16-pin thin QFN package and operate over the extended -40°C to +85°C temperature range.

Simplified Block Diagram

MAX6887, MAX6888: Typical Operating Circuit MAX6887, MAX6888: 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 .