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Maxim > Products > [Supervisors, Voltage Monitors, Sequencers] 
DS1831C, DS1831D, DS1831E
3.3V/2.5V Multisupply Micromonitor


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Status
Active: In Production.

Data Sheet
FULL DATA SHEET (PDF, 200kB)
Download this datasheet in PDF formatDownload   Send this datasheet to any email addressE-Mail

Description
The DS1831C multisupply monitor and reset monitors up to four system voltages: 2.5V 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 2.5V input. One of these inputs must be greater than 1V for device operation. Pushbutton (manual reset) functionality is provided for the 2.5V reset, the 3.3V reset or for all reset outputs by the master pushbutton. The DS1831D replaces one reference comparator and the master pushbutton with watchdog and the DS1831E replaces the 3.3V active-low PBRST 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.

Key Features
  • 2.5V power-on reset
  • 3.3V (or 3V) power-on reset
  • Two referenced comparators with separate outputs for monitoring additional supplies
  • Internal power is drawn from higher of either the IN2.5V 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 (DS1831D)
  • Precision temperature-compensated voltage reference and voltage sensor
  • 16-pin DIP and 16-pin, 150mil SO available
  • Operating temperature of -40°C to +85°C

Key Specifications:  Supervisors (4 Monitored Voltages)
Part Number Interface Reset Thresh.
(V)		 Reset Out tRESET Watchdog Feature Watchdog Timeout Supervisor Features Reset Thresh. Accur.
(%)		 ICC
(µA)		 Price
Active Low min @ +25°C max See Notes
DS1831C 
Factory Fixed
R/C Adjustable
2.5 to 3.3
3.3 to 5.5
 Open Drain
15ms to 85ms
85ms to 300ms
300ms to 1s
 No Watchdog - Manual Reset 2.5 100 $2.85 @1k
DS1831D 
Input/Output (WDI/WDO)
Pin Selectable
1s to 2s
<1s
 $2.85 @1k
DS1831E  No Watchdog - $2.85 @1k
See All Supervisors (4 Monitored Voltages) (26)

Diagram
DS1831C, DS1831D, DS1831E: Block Diagram
Block Diagram

Application Notes
  		• Application Note 245: Adding Hysteresis to CPU Supervisor Voltage Sense Inputs Monitoring Upstream Voltage Supplies for Power-Fail Warnings - DS1831C, DS1831D, DS1831E
  		• Application Note 3316: Dallas Semiconductor Microprocessor Supervisor Selection Guide - DS1831C, DS1831D, DS1831E

    Design Guides
  		• Microprocessor Supervisory (PDF)

    Reliability Reports
  		• Request Reliability Report for:

    Software/Models
    none

    Ordering Information
    Notes:

    1. Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales.
    2. Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day.
    3. Part number suffixes: T or T&R = tape and reel;+ = RoHS/lead-free;# = RoHS/lead-exempt. More: SeeFull Data Sheet or Part Naming Conventions.
    4. * Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.


    Devices: 1-18 of 18

    DS1831C Notes Free
    Sample    		 Buy Status
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    DS1831C+  
    		Active PDIP(N);16 pin;158.4 mm²
    Outline Drawing: 21-0043 (PDF)
    Land Pattern: Not Applicable
    Use pkgcode/variation: P16+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    DS1831C   2.5V and 3V  
    		Active PDIP(N);16 pin;158.4 mm²
    Outline Drawing: 21-0043 (PDF)
    Land Pattern: Not Applicable
    Use pkgcode/variation: P16-1*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    DS1831CS+T&R    
    		Active SOIC(N);16 pin;61.9 mm²
    Outline Drawing: 21-0041 (PDF)
    Land Pattern: 90-0097 (PDF)
    Use pkgcode/variation: S16+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    DS1831CS+  
    		Active SOIC(N);16 pin;61.9 mm²
    Outline Drawing: 21-0041 (PDF)
    Land Pattern: 90-0097 (PDF)
    Use pkgcode/variation: S16+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    DS1831CS   2.5V and 3V  
    		Active SOIC(N);16 pin;61.9 mm²
    Outline Drawing: 21-0041 (PDF)
    Land Pattern: 90-0097 (PDF)
    Use pkgcode/variation: S16-1*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    DS1831CS/T&R   2.5V and 3.0V  
    		Active SOIC(N);16 pin;61.9 mm²
    Outline Drawing: 21-0041 (PDF)
    Land Pattern: 90-0097 (PDF)
    Use pkgcode/variation: S16-1*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    DS1831D Notes Free
    Sample    		 Buy Status
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    DS1831D+    
    		Active PDIP(N);16 pin;158.4 mm²
    Outline Drawing: 21-0043 (PDF)
    Land Pattern: Not Applicable
    Use pkgcode/variation: P16+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    DS1831D   w/WD  
    		Active PDIP(N);16 pin;158.4 mm²
    Outline Drawing: 21-0043 (PDF)
    Land Pattern: Not Applicable
    Use pkgcode/variation: P16-1*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    DS1831DS+  
    		Active SOIC(N);16 pin;61.9 mm²
    Outline Drawing: 21-0041 (PDF)
    Land Pattern: 90-0097 (PDF)
    Use pkgcode/variation: S16+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    DS1831DS+T&R    
    		Active SOIC(N);16 pin;61.9 mm²
    Outline Drawing: 21-0041 (PDF)
    Land Pattern: 90-0097 (PDF)
    Use pkgcode/variation: S16+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    DS1831DS   w/WD  
    		Active SOIC(N);16 pin;61.9 mm²
    Outline Drawing: 21-0041 (PDF)
    Land Pattern: 90-0097 (PDF)
    Use pkgcode/variation: S16-1*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    DS1831DS/T&R   w/WD  
    		Active SOIC(N);16 pin;61.9 mm²
    Outline Drawing: 21-0041 (PDF)
    Land Pattern: 90-0097 (PDF)
    Use pkgcode/variation: S16-1*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    DS1831E Notes Free
    Sample    		 Buy Status
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    DS1831E+    
    		Active PDIP(N);16 pin;158.4 mm²
    Outline Drawing: 21-0043 (PDF)
    Land Pattern: Not Applicable
    Use pkgcode/variation: P16+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    DS1831E   w/Reset Status  
    		Active PDIP(N);16 pin;158.4 mm²
    Outline Drawing: 21-0043 (PDF)
    Land Pattern: Not Applicable
    Use pkgcode/variation: P16-1*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    DS1831ES+    
    		Active SOIC(N);16 pin;61.9 mm²
    Outline Drawing: 21-0041 (PDF)
    Land Pattern: 90-0097 (PDF)
    Use pkgcode/variation: S16+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    DS1831ES+T&R    
    		Active SOIC(N);16 pin;61.9 mm²
    Outline Drawing: 21-0041 (PDF)
    Land Pattern: 90-0097 (PDF)
    Use pkgcode/variation: S16+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    DS1831ES   w/Reset Status  
    		Active SOIC(N);16 pin;61.9 mm²
    Outline Drawing: 21-0041 (PDF)
    Land Pattern: 90-0097 (PDF)
    Use pkgcode/variation: S16-1*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    DS1831ES/T&R   w/Reset Status  
    		Active SOIC(N);16 pin;61.9 mm²
    Outline Drawing: 21-0041 (PDF)
    Land Pattern: 90-0097 (PDF)
    Use pkgcode/variation: S16-1*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis

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    2003-06-03
    This page last modified: 2009-10-23


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