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Maxim > Products > Supervisors, Voltage Monitors, Sequencers 
DS1832
3.3 Volt MicroMonitor Chip


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Data Sheet
FULL DATA SHEET (PDF, 120kB)
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Description
The DS1832 3.3-volt MicroMonitor Chip is pin-compatible with the industry-standard DS1232 and operates in both 3.0- and 3.3-volt environments. Like the DS1232, the DS1832 monitors power supply, software execution, and an external pushbutton override. It is designed with CMOS outputs and is capable of maintaining a valid output on the active low reset to 0 volts with a 100kΩ pull-down resistor. On power-up, the DS1832 holds reset for 250ms to allow the system to stabilize.

Moving a design from 5 volts to 3.3 volts can be as simple as substituting the DS1832 for the DS1232 and removing the pull-up resistor on the active low reset. This makes it a versatile, space- and cost-saving monitor for any processor-driven system requiring reliable operation.

Key Features
  • Power-fail detection
  • Pushbutton reset
  • Watchdog timer
  • Active high and low resets
  • Quiescent current less than 35µA
  • Operating ranges:
    • -40°C to +85°C
    • 3.0V with 20% tolerance or
    • 3.3V with 10% or 20% tolerance

Key Specifications:   Supervisors (1 Monitored Voltage)
Part Number Reset Threshold Range (V) Active-Low Reset Output Active-High Reset Output Min. Reset Timeout Range Watchdog Feature Nom. Watchdog Timeout Range Supervisor Features Reset Thresh. Acc. (% @+25°C) Max. ICC (µA) RoHS Available Package Operating Temp. Range (°C) Price**
DS1832  2.5 to 3.3 Push-Pull Push-Pull 85ms to 300ms No Watchdog 1s to 2s
<1s 		Manual Reset 2.5 35 Yes PDIP/8
SOIC/8
uSOP/8 		-40 to +85
0 to +70 		$1.17 @ 1k
See All Supervisors (1 Monitored Voltage) (268)
Notes:
**This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

Application Notes
  		• Application Note 3316: Dallas Semiconductor Microprocessor Supervisor Selection Guide - DS1832

    Evaluation Kits
    none

    Design Guides
  		• MICROPROCESSOR SUPERVISORY (PDF)

    Reliability Reports
  		• Reliability Report: DS1832.pdf

    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: 1-10 of 10

    DS1832 Notes Free
    Sample    		 Buy
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    DS1832+  
    		PDIP;8 pin;
    Dwg: 56-G5005-000
    Use pkgcode/variation: P8+6*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    DS1832  
    		PDIP;8 pin;
    Dwg: 56-G5005-000
    Use pkgcode/variation: P8-6*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    DS1832S/T&R   3.3V 2500/Reel
    		SOIC;8 pin;
    Dwg: 21-0041B (PDF)
    Use pkgcode/variation: S8-2*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    DS1832S  
    		SOIC;8 pin;
    Dwg: 21-0041B (PDF)
    Use pkgcode/variation: S8-2*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    DS1832S+  
    		SOIC;8 pin;
    Dwg: 21-0041B (PDF)
    Use pkgcode/variation: S8+2*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    DS1832S+T&R   3.3V 2500/Reel
    		SOIC;8 pin;
    Dwg: 21-0041B (PDF)
    Use pkgcode/variation: S8+2*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    DS1832U+  
    		uMAX;8 pin;
    Dwg: 21-0036K (PDF)
    Use pkgcode/variation: U8+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    DS1832U  
    		uMAX;8 pin;
    Dwg: 21-0036K (PDF)
    Use pkgcode/variation: U8-1*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    DS1832U/T&R   3.3V 3000/Reel
    		uMAX;8 pin;
    Dwg: 21-0036K (PDF)
    Use pkgcode/variation: U8-1*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    DS1832U+T&R   3.3V 3000/Reel
    		uMAX;8 pin;
    Dwg: 21-0036K (PDF)
    Use pkgcode/variation: U8+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis

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    1999-11-20
    This page last modified: 2007-07-25




             


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