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Microprocessor Monitor

Improved MAX1232 Cuts Power Consumption by 10X

Product Details

Key Features

Parametric specs for Supervisors (1 Monitored Voltage)
Reset Thresh. (V) 3.3 to 5.5
Reset Thresh. Accur. (%) (@ +25°C) 2.5
Reset Out Active High
Active Low
Open Drain
tRESET (min) 85ms to 300ms
Watchdog Feature Input (WDI)
Watchdog Timeout 1s to 2s
<1s
Adjustable
Supervisor Features Manual Reset
ICC (µA) (max) 200
Package/Pins CDIP/8
PDIP/8
SOIC (N)/8
SOIC (W)/16
Budgetary
Price (See Notes)
2.11
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Simplified Block Diagram

Technical Docs

Data Sheet Microprocessor Monitor Dec 01, 2014

Support & Training

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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.

Parameters

Parametric specs for Supervisors (1 Monitored Voltage)
Reset Thresh. (V) 3.3 to 5.5
Reset Thresh. Accur. (%) (@ +25°C) 2.5
Reset Out Active High
Active Low
Open Drain
tRESET (min) 85ms to 300ms
Watchdog Feature Input (WDI)
Watchdog Timeout 1s to 2s
<1s
Adjustable
Supervisor Features Manual Reset
ICC (µA) (max) 200
Package/Pins CDIP/8
PDIP/8
SOIC (N)/8
SOIC (W)/16
Budgetary
Price (See Notes)
2.11

Key Features

  • Consumes 1/10th the Power of the DS1232
  • Precision Voltage Monitor—Adjustable +4.5V or +4.75V
  • Power-OK/Reset Pulse Width—250ms Min
  • No External Components
  • Adjustable Watchdog Timer—150ms, 600ms, or 1.2s
  • Debounced Manual Reset Input for External Override
  • Available in 8-Pin PDIP/SO and 16-Pin Wide SO Packages

Applications/Uses

  • Computers
  • Controllers
  • Critical µP Power Monitoring
  • Intelligent Instruments

Description

The MAX1232 microprocessor (µP) supervisory circuit provides µP housekeeping and power-supply supervision functions while consuming only 1/10th the power of the DS1232. The MAX1232 enhances circuit reliability in µP systems by monitoring the power supply, monitoring the software execution, and providing a debounced manual reset input. The MAX1232 is a plug-in upgrade of the Dallas DS1232.

A reset pulse of at least 250ms duration is supplied on power-up, power-down, and low-voltage brownout conditions (5% or 10% supply tolerances can be selected digitally). Also featured is a debounced manual reset input that forces the reset outputs to their active states for a minimum of 250ms. A digitally programmable watchdog timer monitors software execution and can be programmed for timeout settings of 150ms, 600ms, or 1.2s. The MAX1232 requires no external components.

Simplified Block Diagram

MAX1232: Typical Operating Circuit MAX1232: Typical Operating Circuit Zoom icon

Technical Docs

Data Sheet Microprocessor Monitor Dec 01, 2014

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.