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±1% Accuracy, Low-Power, +3V and +5V µP Supervisory Circuits

1% Accurate Microprocessor Supervisory ICs

Product Details

The MAX814/MAX815/MAX816 are high-accuracy microprocessor (µP) supervisory circuits that provide power-on reset, watchdog, and power-fail functions. They eliminate manual trimming and improve reliability in critical applications needing high-accuracy reset thresholds. The active-low RESET output is guaranteed to be in the correct state for VCC down to 1V. The reset comparator is designed to ignore fast transients on VCC. Reset thresholds are available for operation with a variety of 3V and 5V supply voltages.

A 75µA maximum supply current makes the MAX814/MAX815/MAX816 ideal for use in portable equipment. All three devices are available in 8-pin DIP and SO packages. See the Selector Table below for a review of features.

Key Features

  • ±1% Worst-Case Reset Threshold Accuracy
  • 4.8V, 4.7V, 4.55V, 3.03V, or Adjustable Reset Thresholds
  • ±1% Low-Line Threshold Accuracy (MAX814) 60mV Above Reset Threshold
  • 200ms Reset Time Delay
  • Active-Low RESET Output
  • Active-High RESET Output (MAX814/MAX816)
  • 75µA Max Supply Current
  • Guaranteed active-low RESET Valid to VCC = 1V
  • Manual Reset Input
  • ±2% Power-Fail Comparator
  • Independent Watchdog with 1.56sec Timeout (MAX815)
  • Power-Supply Glitch Immunity
  • 8-Pin SO and DIP Packages

Applications/Uses

  • Controllers
  • Critical µP Monitoring
  • Intelligent Instruments
  • Medical Equipment
  • Portable Battery-Powered Equipment
  • Set-Top Boxes
Parametric specs for Supervisors (1 Monitored Voltage)
Reset Thresh. (V) 1.2 to 1.8
1.8 to 2.5
2.5 to 3.3
3.3 to 5.5
Reset Thresh. Accur. (%) (@ +25°C) 1
Reset Out Active High
Active Low
Push-Pull
tRESET (min) 85ms to 300ms
Watchdog Feature No Watchdog
Watchdog Timeout -
Supervisor Features Adjustable Reset Input
Manual Reset
Power Fail Comparator/Low Battery Detect
ICC (µA) (max) 75
Package/Pins PDIP/8
SOIC (N)/8
Budgetary
Price (See Notes)
$6.11 @1k
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Simplified Block Diagram

MAX814, MAX815, MAX816: Typical Application Circuits MAX814, MAX815, MAX816: Typical Application Circuits Zoom icon

Technical Docs

Design & Development

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Parameters

Parametric specs for Supervisors (1 Monitored Voltage)
Reset Thresh. (V) 1.2 to 1.8
1.8 to 2.5
2.5 to 3.3
3.3 to 5.5
Reset Thresh. Accur. (%) (@ +25°C) 1
Reset Out Active High
Active Low
Push-Pull
tRESET (min) 85ms to 300ms
Watchdog Feature No Watchdog
Watchdog Timeout -
Supervisor Features Adjustable Reset Input
Manual Reset
Power Fail Comparator/Low Battery Detect
ICC (µA) (max) 75
Package/Pins PDIP/8
SOIC (N)/8
Budgetary
Price (See Notes)
$6.11 @1k

Key Features

  • ±1% Worst-Case Reset Threshold Accuracy
  • 4.8V, 4.7V, 4.55V, 3.03V, or Adjustable Reset Thresholds
  • ±1% Low-Line Threshold Accuracy (MAX814) 60mV Above Reset Threshold
  • 200ms Reset Time Delay
  • Active-Low RESET Output
  • Active-High RESET Output (MAX814/MAX816)
  • 75µA Max Supply Current
  • Guaranteed active-low RESET Valid to VCC = 1V
  • Manual Reset Input
  • ±2% Power-Fail Comparator
  • Independent Watchdog with 1.56sec Timeout (MAX815)
  • Power-Supply Glitch Immunity
  • 8-Pin SO and DIP Packages

Applications/Uses

  • Controllers
  • Critical µP Monitoring
  • Intelligent Instruments
  • Medical Equipment
  • Portable Battery-Powered Equipment
  • Set-Top Boxes

Description

The MAX814/MAX815/MAX816 are high-accuracy microprocessor (µP) supervisory circuits that provide power-on reset, watchdog, and power-fail functions. They eliminate manual trimming and improve reliability in critical applications needing high-accuracy reset thresholds. The active-low RESET output is guaranteed to be in the correct state for VCC down to 1V. The reset comparator is designed to ignore fast transients on VCC. Reset thresholds are available for operation with a variety of 3V and 5V supply voltages.

A 75µA maximum supply current makes the MAX814/MAX815/MAX816 ideal for use in portable equipment. All three devices are available in 8-pin DIP and SO packages. See the Selector Table below for a review of features.

Simplified Block Diagram

MAX814, MAX815, MAX816: Typical Application Circuits MAX814, MAX815, MAX816: Typical Application Circuits 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