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Maxim > Products > [Supervisors, Voltage Monitors, Sequencers] 
DS1834, DS1834A, DS1834D
Dual EconoReset with Pushbutton


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Status
Active: In Production.

Data Sheet
FULL DATA SHEET (PDF, 120kB)
Download this datasheet in PDF formatDownload   Send this datasheet to any email addressE-Mail

Description
The DS1834 Dual EconoReset with Pushbutton is designed to monitor power and protect processing in dual-voltage systems. It operates from the higher of a 3-volt or 5-volt input, monitoring both for in-tolerance conditions. When safety thresholds are breached from either input, the DS1834 initiates reset. On power return, it automatically restarts the processor, maintaining reset for 350ms to allow stabilization. The DS1834 also monitors a pushbutton input to allow for external over-ride.

Using pin adjustments, voltage reset tolerances can be set in different combinations for the 5V and 3.V power supplies, respectively: 10% and 10% 10% and 20% and 5% and 10%. DS1834A NMOS outputs can be wire-AND'd to either the 5-volt or 3-volt level. The DS1834 and DS1834D have CMOS outputs for low-current operation.

The DS1834 is targeted for multi-voltage microprocessor systems and subsystems, or for buses that do not operate at the same voltage as the µP or core logic. By integrating monitoring functions required for a particular application, the DS1834 enhances processor reliability with considerable savings in space and cost.

Key Features
  • Monitors both 3.3V and 5V power supplies
  • 3.3V and 5V power-on and power transient resets
  • Provides pushbutton switch for manual reset control
  • Active low push-pull outputs (DS1834)
  • Active low open-drain outputs (DS1834A)
  • Active high push-pull outputs (DS1834D)
  • Draws internal power from the higher of the two sources
  • Uses precision temperature-compensated voltage reference and sensor
  • Maintains active high reset for 350ms after power return
  • Internal 5kΩ pull-up resistor
  • Operating ranges:
    • 5V with 5% or 10% tolerance
    • 3.3V with 10% or 20% tolerance
    • -40°C to +85°C

Key Specifications:  Supervisors (2 Monitored Voltages)
Part Number Interface Reset Thresh.
(V)		 Reset Out tRESET Watchdog Feature Supervisor Features Reset Thresh. Accur.
(%)		 ICC
(µA)		 Price
Active Low min @ +25°C max See Notes
DS1834  Factory Fixed
2.5 to 3.3
3.3 to 5.5
 Open Drain 85ms to 300ms No Watchdog
Manual Reset
Power Fail Comparator/Low Battery Detect
 2.5 50 $1.26 @1k
DS1834A  Open Drain $1.26 @1k
DS1834D  - $1.26 @1k
See All Supervisors (2 Monitored Voltages) (84)

Diagram
DS1834, DS1834A, DS1834D: Block Diagram
Block Diagram

Application Notes
  		• Application Note 589: CPU Supervisors: Frequently Asked Questions - DS1834
  		• Application Note 3316: Dallas Semiconductor Microprocessor Supervisor Selection Guide - DS1834, DS1834A, DS1834D

    Design Guides
  		• Microprocessor Supervisory (PDF)

    Reliability Reports
  		• Reliability Report: DS1834.pdf
  		• 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: 1-31 of 31

    DS1834 Notes Free
    Sample    		 Buy Status
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    DS1834+  
    		Active PDIP(N);8 pin;79.7 mm²
    Outline Drawing: 21-0043 (PDF)
    Land Pattern: Not Applicable
    Use pkgcode/variation: P8+2*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    DS1834   CMOS, Active Low  
    		Active PDIP(N);8 pin;79.7 mm²
    Outline Drawing: 21-0043 (PDF)
    Land Pattern: Not Applicable
    Use pkgcode/variation: P8-2*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    DS1834S   CMOS, Active Low  
    		Active SOIC(N);8 pin;30.9 mm²
    Outline Drawing: 21-0041 (PDF)
    Land Pattern: 90-0096 (PDF)
    Use pkgcode/variation: S8-2*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    DS1834S/T&R   CMOS Active Low 2500/Reel  
    		Active SOIC(N);8 pin;30.9 mm²
    Outline Drawing: 21-0041 (PDF)
    Land Pattern: 90-0096 (PDF)
    Use pkgcode/variation: S8-2*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    DS1834S+T&R   CMOS, Active Low 2500/Reel  
    		Active SOIC(N);8 pin;30.9 mm²
    Outline Drawing: 21-0041 (PDF)
    Land Pattern: 90-0096 (PDF)
    Use pkgcode/variation: S8+2*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    DS1834S+  
    		Active SOIC(N);8 pin;30.9 mm²
    Outline Drawing: 21-0041 (PDF)
    Land Pattern: 90-0096 (PDF)
    Use pkgcode/variation: S8+2*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    DS1834U+  
    		Active µMAX;8 pin;16.2 mm²
    Outline Drawing: 21-0036 (PDF)
    Land Pattern: 90-0092 (PDF)
    Use pkgcode/variation: U8+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    DS1834U   CMOS, Active Low  
    		Active µMAX;8 pin;16.2 mm²
    Outline Drawing: 21-0036 (PDF)
    Land Pattern: 90-0092 (PDF)
    Use pkgcode/variation: U8-1*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    DS1834U/T&R   CMOS Active Low 3000/Reel  
    		Active µMAX;8 pin;16.2 mm²
    Outline Drawing: 21-0036 (PDF)
    Land Pattern: 90-0092 (PDF)
    Use pkgcode/variation: U8-1*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    DS1834U+T&R   CMOS, Active Low 3000/Reel  
    		Active µMAX;8 pin;16.2 mm²
    Outline Drawing: 21-0036 (PDF)
    Land Pattern: 90-0092 (PDF)
    Use pkgcode/variation: U8+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    DS1834A Notes Free
    Sample    		 Buy Status
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    DS1834A+  
    		Active PDIP(N);8 pin;79.7 mm²
    Outline Drawing: 21-0043 (PDF)
    Land Pattern: Not Applicable
    Use pkgcode/variation: P8+2*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    DS1834A   Open Drain Active Low  
    		Active PDIP(N);8 pin;79.7 mm²
    Outline Drawing: 21-0043 (PDF)
    Land Pattern: Not Applicable
    Use pkgcode/variation: P8-2*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    DS1834AS/T&R/C02    
    		Active SOIC(N);8 pin;30.9 mm²
    Outline Drawing: 21-0041 (PDF)
    Land Pattern: 90-0096 (PDF)
    Use pkgcode/variation: S8-2*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    DS1834AS   Open Drain Active Low  
    		Active SOIC(N);8 pin;30.9 mm²
    Outline Drawing: 21-0041 (PDF)
    Land Pattern: 90-0096 (PDF)
    Use pkgcode/variation: S8-2*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    DS1834AS/T&R   Open Drain Active Low 2500/Reel  
    		Active SOIC(N);8 pin;30.9 mm²
    Outline Drawing: 21-0041 (PDF)
    Land Pattern: 90-0096 (PDF)
    Use pkgcode/variation: S8-2*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    DS1834AS+T&R   Open Drain, Active Low, 2500/Reel  
    		Active SOIC(N);8 pin;30.9 mm²
    Outline Drawing: 21-0041 (PDF)
    Land Pattern: 90-0096 (PDF)
    Use pkgcode/variation: S8+2*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    DS1834AS+  
    		Active SOIC(N);8 pin;30.9 mm²
    Outline Drawing: 21-0041 (PDF)
    Land Pattern: 90-0096 (PDF)
    Use pkgcode/variation: S8+2*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    DS1834AU   Open Drain Active Low  
    		Active µMAX;8 pin;16.2 mm²
    Outline Drawing: 21-0036 (PDF)
    Land Pattern: 90-0092 (PDF)
    Use pkgcode/variation: U8-1*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    DS1834AU/T&R   Open Drain Active Low 3000/Reel  
    		Active µMAX;8 pin;16.2 mm²
    Outline Drawing: 21-0036 (PDF)
    Land Pattern: 90-0092 (PDF)
    Use pkgcode/variation: U8-1*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    DS1834AU+T&R   Open Drain, Active Low 3000/Reel  
    		Active µMAX;8 pin;16.2 mm²
    Outline Drawing: 21-0036 (PDF)
    Land Pattern: 90-0092 (PDF)
    Use pkgcode/variation: U8+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    DS1834AU+  
    		Active µMAX;8 pin;16.2 mm²
    Outline Drawing: 21-0036 (PDF)
    Land Pattern: 90-0092 (PDF)
    Use pkgcode/variation: U8+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    DS1834D Notes Free
    Sample    		 Buy Status
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    DS1834D+    
    		Active PDIP(N);8 pin;79.7 mm²
    Outline Drawing: 21-0043 (PDF)
    Land Pattern: Not Applicable
    Use pkgcode/variation: P8+2*
    		0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    DS1834D   CMOS, Active High  
    		Active PDIP(N);8 pin;79.7 mm²
    Outline Drawing: 21-0043 (PDF)
    Land Pattern: Not Applicable
    Use pkgcode/variation: P8-2*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    DS1834DS+    
    		Active SOIC(N);8 pin;30.9 mm²
    Outline Drawing: 21-0041 (PDF)
    Land Pattern: 90-0096 (PDF)
    Use pkgcode/variation: S8+2*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    DS1834DS   CMOS, Active High  
    		Active SOIC(N);8 pin;30.9 mm²
    Outline Drawing: 21-0041 (PDF)
    Land Pattern: 90-0096 (PDF)
    Use pkgcode/variation: S8-2*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    DS1834DS/T&R   CMOS Active High 2500/Reel  
    		Active SOIC(N);8 pin;30.9 mm²
    Outline Drawing: 21-0041 (PDF)
    Land Pattern: 90-0096 (PDF)
    Use pkgcode/variation: S8-2*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    DS1834DS+T&R   CMOS, Active High 2500/Reel  
    		Active SOIC(N);8 pin;30.9 mm²
    Outline Drawing: 21-0041 (PDF)
    Land Pattern: 90-0096 (PDF)
    Use pkgcode/variation: S8+2*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    DS1834DU+    
    		Active µMAX;8 pin;16.2 mm²
    Outline Drawing: 21-0036 (PDF)
    Land Pattern: 90-0092 (PDF)
    Use pkgcode/variation: U8+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    DS1834DU   CMOS, Active High  
    		Active µMAX;8 pin;16.2 mm²
    Outline Drawing: 21-0036 (PDF)
    Land Pattern: 90-0092 (PDF)
    Use pkgcode/variation: U8-1*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    DS1834DU/T&R   CMOS Active High 3000/Reel  
    		Active µMAX;8 pin;16.2 mm²
    Outline Drawing: 21-0036 (PDF)
    Land Pattern: 90-0092 (PDF)
    Use pkgcode/variation: U8-1*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    DS1834DU+T&R   CMOS, Active High 3000/Reel  
    		Active µMAX;8 pin;16.2 mm²
    Outline Drawing: 21-0036 (PDF)
    Land Pattern: 90-0092 (PDF)
    Use pkgcode/variation: U8+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis

    More Information
  		• New Product Press Release 2001-04-30 

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    2000-07-17
    This page last modified: 2009-10-23


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