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Quad Voltage µP Supervisory Circuit in SOT Package

Industry's Smallest Quad Voltage Reset IC

Product Details

Key Features

Parametric specs for Supervisors (4 Monitored Voltages)
Reset Thresh. (V) 1.2 to 1.8
1.8 to 2.5
2.5 to 3.3
3.3 to 5.5
Reset Out Active Low
Open Drain
Interface Factory Fixed
R/C Adjustable
tRESET (min) 85ms to 300ms
Watchdog Feature No Watchdog
Supervisor Features Adjustable Reset Input
Negative Voltage
ICC (µA) (max) 40
Package/Pins SOT23/6
Budgetary
Price (See Notes)
2.4
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Simplified Block Diagram

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Parameters

Parametric specs for Supervisors (4 Monitored Voltages)
Reset Thresh. (V) 1.2 to 1.8
1.8 to 2.5
2.5 to 3.3
3.3 to 5.5
Reset Out Active Low
Open Drain
Interface Factory Fixed
R/C Adjustable
tRESET (min) 85ms to 300ms
Watchdog Feature No Watchdog
Supervisor Features Adjustable Reset Input
Negative Voltage
ICC (µA) (max) 40
Package/Pins SOT23/6
Budgetary
Price (See Notes)
2.4

Key Features

  • Monitors Four Power-Supply Voltages
  • Precision Factory-Set Reset Threshold Options for +5.0V, +3.3V, +3.0, +2.5V, +1.8V, and -5.0V Supplies
  • User-Adjustable Voltage Monitoring Threshold Options
  • Low 55µA Supply Current
  • Open-Drain active-low RESET Output with 10µA Internal Pullup
  • 140ms (min) Reset Timeout Period
  • Active-low RESET Valid to IN1 = 1V or IN2 = 1V
  • Immune to Short Monitored Supply Transients
  • No External Components Required
  • Guaranteed from -40°C to +85°C
  • Small 6-Pin SOT23 Package

Applications/Uses

  • Computers: Desktop, Workstation, Server
  • Data Storage Equipment
  • High-End Printers
  • Industrial Equipment
  • Network Equipment
  • Set-Top Boxes
  • Telecommunications

Description

The MAX6339 is a precision quad voltage monitor with microprocessor (µP) supervisory reset timing. The device can monitor up to four system supply voltages without any external components and asserts a single reset if any supply voltage drops below its preset threshold. The device significantly reduces system size and component count while improving reliability compared to separate ICs or discrete components.

A variety of factory-trimmed threshold voltages are available to accommodate different supply voltages and tolerances with minimal external component requirements. The selection includes internally fixed options for monitoring +5.0V, +3.3V, +3.0V, +2.5V, +1.8V, and -5.0V supplies with -5% and/or -10% tolerances. The device is also available with one or two user-adjustable threshold options if non-standard thresholds are desired (use external resistor-divider network).

The quad monitor provides a single active-low reset output that is asserted when any monitored input is below its associated threshold. The output is open drain with a weak internal pullup (10µA) to IN2. Reset remains low for a reset timeout period (140ms min) after all voltages are above the selected thresholds. The output is valid as long as either the IN1 or IN2 input voltage remains > 1V.

The MAX6339 is available in a small 6-pin SOT23 package and operates over the extended (-40°C to +85°C) temperature range.

Simplified Block Diagram

MAX6339: Typical Operating Circuit MAX6339: 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.