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MAX803, MAX803L, MAX803M, MAX803R, MAX803S, MAX803T, MAX803Z

3-Pin Microprocessor Reset Circuits

Industry's-First 3-Pin SC70 Reset ICs

Product Details

The MAX803/MAX809/MAX810 are microprocessor (µP) supervisory circuits used to monitor the power supplies in µP and digital systems. They provide excellent circuit reliability and low cost by eliminating external components and adjustments when used with +5V, +3.3V, +3.0V, or +2.5V powered circuits.

These circuits perform a single function: they assert a reset signal whenever the VCC supply voltage declines below a preset threshold, keeping it asserted for at least 140ms after VCC has risen above the reset threshold. Reset thresholds suitable for operation with a variety of supply voltages are available.

The MAX803 has an open-drain output stage, while the MAX809/MAX810 have push-pull outputs. The MAX803's open-drain active-low RESET output requires a pullup resistor that can be connected to a voltage higher than VCC. The MAX803/MAX809 have an active-low RESET output, while the MAX810 has an active-high RESET output. The reset comparator is designed to ignore fast transients on VCC, and the outputs are guaranteed to be in the correct logic state for VCC down to 1V.

Low supply current makes the MAX803/MAX809/MAX810 ideal for use in portable equipment. The MAX803 is available in a 3-pin SC70 package, and the MAX809/MAX810 are available in 3-pin SC70 or SOT23 packages.

Key Features

  • Precision Monitoring of +2.5V, +3V, +3.3V, and +5V Power-Supply Voltages
  • Fully Specified Over Temperature
  • Available in Three Output Configurations
    • Open-Drain Active-Low RESET Output (MAX803)
    • Push-Pull Active-Low RESET Output (MAX809)
    • Push-Pull RESET Output (MAX810)
  • 140ms min Power-On Reset Pulse Width
  • 12µA Supply Current
  • Guaranteed Reset Valid to VCC= +1V
  • Power Supply Transient Immunity
  • No External Components
  • 3-Pin SC70 and SOT23 Packages
  • AEC-Q100 Qualified. Refer to Ordering Information for Specific /V Versions

Applications/Uses

  • Automotive
  • Computers: Desktop, Workstation, Server
  • Controllers
  • Critical µP and µC Power Monitoring
  • Intelligent Instruments
  • Portable Battery-Powered Equipment
Parametric specs for Supervisors (1 Monitored Voltage)
Reset Thresh. (V) 1.8 to 2.5
2.5 to 3.3
3.3 to 5.5
Reset Thresh. Accur. (%) (@ +25°C) 1.5
Reset Out Active Low
Open Drain
tRESET (min) 85ms to 300ms
Watchdog Feature No Watchdog
ICC (µA) (max) 60
Package/Pins SC70/3
Budgetary
Price (See Notes)
$1.25 @1k
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Simplified Block Diagram

MAX803L, MAX803M, MAX803R, MAX803S, MAX803T, MAX803Z, MAX809, MAX809J, MAX809L, MAX809M, MAX809R, MAX809S, MAX809T, MAX809Z, MAX810, MAX810L, MAX810M, MAX810R, MAX810S, MAX810T, MAX810Z: Typical Operating Circuit MAX803L, MAX803M, MAX803R, MAX803S, MAX803T, MAX803Z, MAX809, MAX809J, MAX809L, MAX809M, MAX809R, MAX809S, MAX809T, MAX809Z, MAX810, MAX810L, MAX810M, MAX810R, MAX810S, MAX810T, MAX810Z: Typical Operating Circuit Zoom icon

Technical Docs

Design & Development

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SIMULATION MODELS

MAX803 PSPICE Macromodel

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SIMULATION MODELS

MAX803 IBIS Model

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Support & Training

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Parameters

Parametric specs for Supervisors (1 Monitored Voltage)
Reset Thresh. (V) 1.8 to 2.5
2.5 to 3.3
3.3 to 5.5
Reset Thresh. Accur. (%) (@ +25°C) 1.5
Reset Out Active Low
Open Drain
tRESET (min) 85ms to 300ms
Watchdog Feature No Watchdog
ICC (µA) (max) 60
Package/Pins SC70/3
Budgetary
Price (See Notes)
$1.25 @1k

Key Features

  • Precision Monitoring of +2.5V, +3V, +3.3V, and +5V Power-Supply Voltages
  • Fully Specified Over Temperature
  • Available in Three Output Configurations
    • Open-Drain Active-Low RESET Output (MAX803)
    • Push-Pull Active-Low RESET Output (MAX809)
    • Push-Pull RESET Output (MAX810)
  • 140ms min Power-On Reset Pulse Width
  • 12µA Supply Current
  • Guaranteed Reset Valid to VCC= +1V
  • Power Supply Transient Immunity
  • No External Components
  • 3-Pin SC70 and SOT23 Packages
  • AEC-Q100 Qualified. Refer to Ordering Information for Specific /V Versions

Applications/Uses

  • Automotive
  • Computers: Desktop, Workstation, Server
  • Controllers
  • Critical µP and µC Power Monitoring
  • Intelligent Instruments
  • Portable Battery-Powered Equipment

Description

The MAX803/MAX809/MAX810 are microprocessor (µP) supervisory circuits used to monitor the power supplies in µP and digital systems. They provide excellent circuit reliability and low cost by eliminating external components and adjustments when used with +5V, +3.3V, +3.0V, or +2.5V powered circuits.

These circuits perform a single function: they assert a reset signal whenever the VCC supply voltage declines below a preset threshold, keeping it asserted for at least 140ms after VCC has risen above the reset threshold. Reset thresholds suitable for operation with a variety of supply voltages are available.

The MAX803 has an open-drain output stage, while the MAX809/MAX810 have push-pull outputs. The MAX803's open-drain active-low RESET output requires a pullup resistor that can be connected to a voltage higher than VCC. The MAX803/MAX809 have an active-low RESET output, while the MAX810 has an active-high RESET output. The reset comparator is designed to ignore fast transients on VCC, and the outputs are guaranteed to be in the correct logic state for VCC down to 1V.

Low supply current makes the MAX803/MAX809/MAX810 ideal for use in portable equipment. The MAX803 is available in a 3-pin SC70 package, and the MAX809/MAX810 are available in 3-pin SC70 or SOT23 packages.

Simplified Block Diagram

MAX803L, MAX803M, MAX803R, MAX803S, MAX803T, MAX803Z, MAX809, MAX809J, MAX809L, MAX809M, MAX809R, MAX809S, MAX809T, MAX809Z, MAX810, MAX810L, MAX810M, MAX810R, MAX810S, MAX810T, MAX810Z: Typical Operating Circuit MAX803L, MAX803M, MAX803R, MAX803S, MAX803T, MAX803Z, MAX809, MAX809J, MAX809L, MAX809M, MAX809R, MAX809S, MAX809T, MAX809Z, MAX810, MAX810L, MAX810M, MAX810R, MAX810S, MAX810T, MAX810Z: 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