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Multisupply MicroMonitor™

Product Details

Key Features

Parametric specs for Supervisors (4 Monitored Voltages)
Reset Thresh. (V) 2.5 to 3.3
3.3 to 5.5
Reset Thresh. Accur. (%) (@ +25°C) 2.5
Reset Out Active Low
Open Drain
Interface Factory Fixed
R/C Adjustable
tRESET (min) 15ms to 85ms
85ms to 300ms
300ms to 1s
Watchdog Feature No Watchdog
Supervisor Features Manual Reset
ICC (µA) (max) 100
Package/Pins See Data Sheet
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Simplified Block Diagram

Technical Docs

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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 (4 Monitored Voltages)
Reset Thresh. (V) 2.5 to 3.3
3.3 to 5.5
Reset Thresh. Accur. (%) (@ +25°C) 2.5
Reset Out Active Low
Open Drain
Interface Factory Fixed
R/C Adjustable
tRESET (min) 15ms to 85ms
85ms to 300ms
300ms to 1s
Watchdog Feature No Watchdog
Supervisor Features Manual Reset
ICC (µA) (max) 100
Package/Pins See Data Sheet

Key Features

  • 5V power-on reset
  • 3.3 (or 3V) power-on reset
  • Two referenced comparators with separate outputs for monitoring additional supplies
  • Internal power is drawn from higher of either the IN5V input or the IN3.3V input
  • Excellent for systems designed to operate with multiple power supplies
  • Asserts resets during power transients
  • Pushbutton reset input for system override
  • Maintains reset for user configurable times of 10ms, 100ms, or 1s
  • Watchdog timer for software monitoring (DS1831A)
  • Precision temperature-compensated voltage reference and voltage sensor
  • 16-pin DIP and 16-pin 150-mil SO available
  • Operating Temperature of -40°C to +85°C


Applications/Uses

Description

The DS1831 multisupply monitor and reset monitors up to four system voltages: 5V supply, 3.3V (or 3V) supply, and two additional user configurable voltage monitors. DS1831 power for internal operation comes from the higher voltage level of the 3.3V input or the 5V input. One of these inputs must be greater than 1V for device operation. Pushbutton (manual reset) functionality is provided for the 5V reset, the 3.3V reset or for all reset outputs by the master pushbutton. The DS1831A replaces one reference comparator and the master pushbutton with watchdog and the DS1831B replaces the 3.3V with a last reset status output.

TOL and TD inputs allow user configuration of the DS1831 for multiple applications. The TOL inputs configure the tolerance for the specified output and the TD inputs configure the reset time delays.

Simplified Block Diagram

DS1831, DS1831A, DS1831B: Block Diagram DS1831, DS1831A, DS1831B: Block Diagram 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.