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Maxim > Products > Supervisors, Voltage Monitors, Sequencers 
MAX6841, MAX6842, MAX6843, MAX6844, MAX6845
Ultra-Low-Voltage µP Reset Circuits and Voltage Detectors

Ultra-Low-Voltage SC70 µP Supervisors Monitor Supplies Down to 0.9V with No External Components


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Data Sheet
FULL DATA SHEET (PDF, 584kB)
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Description
The MAX6841–MAX6845 microprocessor (µP) supervisory circuits monitor ultra-low-voltage power supplies in µP and digital systems. They provide excellent circuit reliability at low cost by eliminating external components and adjustments when used with +0.9V to +1.5V systems. Factory-trimmed reset thresholds are available for the MAX6841/MAX6842. The MAX6843/MAX6844/MAX6845 provide a RESET IN input, allowing the user to externally adjust the reset threshold. The MAX6841–MAX6845 family features a debounced manual reset input (active-low MR). The reset comparator is designed to ignore fast transients on VCC.

The MAX6841–MAX6845 assert a reset signal whenever the VCC supply voltage declines below a preset or adjustable threshold or whenever manual reset (active-low MR) is asserted. Reset remains asserted for a fixed timeout delay after VCC has risen above the reset threshold and when manual reset is deasserted. Five timeout periods are available for each part: 150µs (voltage detector version), 1.5ms, 30ms, 210ms, and 1.68s (typ).

The MAX6841/MAX6843 have an active-low push-pull reset output. The MAX6841/MAX6842/MAX6844 have an active-high push-pull reset output, and the MAX6842/MAX6845 have an active-low open-drain reset output. The active-low open-drain reset output requires a pullup resistor that can be connected to a voltage from 0 to VCC.

The low supply current (5.7µA) and small package (SOT23-5) make the MAX6841–MAX6845 ideal for use in portable equipment.

Key Features   Applications/Uses
  • Factory-Set Reset Threshold Voltages for Monitoring Supplies from 0.9V to 1.5V (MAX6841/MAX6842)
  • Adjustable Threshold RESET IN (MAX6843/MAX6844/MAX6845)
  • Low Power Consumption: 5.7µA (typ)
  • ±2.5% Reset Threshold Accuracy Over Temperature
  • Five Timeout Periods: 150µs (Voltage Detector Version), 1.5ms, 30ms, 210ms, and 1.68s
  • Available in Three Output Configurations
    • Push-Pull active-low RESET
    • Push-Pull RESET
    • Open-Drain active-low RESET
  • Guaranteed Reset Valid to VCC = 0.55V (Active Low)
  • Manual Reset Input
  • Immune to Short VCC Transients
  • Space-Saving 5-Pin SOT23 Package

 
  		• Computers
  		• Controllers
  		• Critical µP and µC Power Monitoring
  		• Intelligent Instruments
  		• Portable Battery-Powered Equipment
  		• Servers and Workstations
  		• Telecom/Networking Equipment
  		• Wireless Base Stations

    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 Supervisor Features Reset Thresh. Acc. (% @+25°C) Max. ICC (µA) Price**
    MAX6841  0 to 1.2
    1.2 to 1.8     		Push-Pull Push-Pull 15ms to 85ms
    1ms to 15ms
    85ms to 300ms
    <1ms
    >1s     		No Watchdog Manual Reset 2.5 20 $1.16 @ 1k
    MAX6842  0 to 1.2
    1.2 to 1.8     		Open Drain Push-Pull Manual Reset $1.16 @ 1k
    MAX6843  0 to 1.2
    1.2 to 1.8
    1.8 to 2.5
    2.5 to 3.3
    3.3 to 5.5     		Push-Pull  -  Adjustable Reset Input
    Manual Reset     		$1.16 @ 1k
    MAX6844  0 to 1.2
    1.2 to 1.8
    1.8 to 2.5
    2.5 to 3.3
    3.3 to 5.5     		 -  Push-Pull Adjustable Reset Input
    Manual Reset     		$1.16 @ 1k
    MAX6845  0 to 1.2
    1.2 to 1.8
    1.8 to 2.5
    2.5 to 3.3
    3.3 to 5.5     		Open Drain  -  Adjustable Reset Input
    Manual Reset     		$1.16 @ 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.

    Diagram
    MAX6841, MAX6842, MAX6843, MAX6844, MAX6845: Typical Operating Circuit
    Typical Operating Circuit

    Evaluation Kits
    none

    Design Guides
  		• Microprocessor Supervisory (PDF)

    Reliability Reports
  		• Show FIT data for:
  		• Reliability Report: MAX6841xUKDx.pdf MAX6842xUKDx.pdf MAX6843UKDx.pdf MAX6844UKDx.pdf MAX6845UKDx.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.


    Filter:

    Devices: 1-100 of 284

    1 2 3  --->

    MAX6841 Free
    Sample    		 Buy
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX6841IUKD4+  



    		-40°C to +85°C See data sheet
    MAX6841GUKD2+T  



    		-40°C to +85°C See data sheet
    MAX6841GUKD4+  



    		-40°C to +85°C See data sheet
    MAX6841GUKD4+T  



    		-40°C to +85°C See data sheet
    MAX6841FUKD4+T  



    		-40°C to +85°C See data sheet
    MAX6841HUKD1+  



    		-40°C to +85°C See data sheet
    MAX6841HUKD1+T  



    		-40°C to +85°C See data sheet
    MAX6841HUKD2+  



    		-40°C to +85°C See data sheet
    MAX6841HUKD2+T  



    		-40°C to +85°C See data sheet
    MAX6841HUKD4+  



    		-40°C to +85°C See data sheet
    MAX6841HUKD4+T  



    		-40°C to +85°C See data sheet
    MAX6841IUKD0+  



    		-40°C to +85°C See data sheet
    MAX6841IUKD0+T  



    		-40°C to +85°C See data sheet
    MAX6841IUKD1+  



    		-40°C to +85°C See data sheet
    MAX6841IUKD1+T  



    		-40°C to +85°C See data sheet
    MAX6841IUKD2+  



    		-40°C to +85°C See data sheet
    MAX6841IUKD4+T  



    		-40°C to +85°C See data sheet
    MAX6841IUKD2+T  



    		-40°C to +85°C See data sheet
    MAX6841GUKD2+  



    		-40°C to +85°C See data sheet
    MAX6841GUKD1+T  



    		-40°C to +85°C See data sheet
    MAX6841EUKD2+T  



    		-40°C to +85°C See data sheet
    MAX6841EUKD2+  



    		-40°C to +85°C See data sheet
    MAX6841DUKD1+  



    		-40°C to +85°C See data sheet
    MAX6841DUKD1+T  



    		-40°C to +85°C See data sheet
    MAX6841DUKD2+  



    		-40°C to +85°C See data sheet
    MAX6841EUKD1+T  



    		-40°C to +85°C See data sheet
    MAX6841EUKD1+  



    		-40°C to +85°C See data sheet
    MAX6841DUKD2+T  



    		-40°C to +85°C See data sheet
    MAX6841EUKD4+  



    		-40°C to +85°C See data sheet
    MAX6841EUKD4+T  



    		-40°C to +85°C See data sheet
    MAX6841GUKD1+  



    		-40°C to +85°C See data sheet
    MAX6841GUKD0+T  



    		-40°C to +85°C See data sheet
    MAX6841GUKD0+  



    		-40°C to +85°C See data sheet
    MAX6841FUKD4+  



    		-40°C to +85°C See data sheet
    MAX6841FUKD2+T  



    		-40°C to +85°C See data sheet
    MAX6841FUKD2+  



    		-40°C to +85°C See data sheet
    MAX6841FUKD1+T  



    		-40°C to +85°C See data sheet
    MAX6841FUKD1+  



    		-40°C to +85°C See data sheet
    MAX6841DUKD2  



    		See data sheet
    MAX6841IUKD1  



    		See data sheet
    MAX6841DUKD1  



    		-40°C to +85°C See data sheet
    MAX6841EUKD1  



    		-40°C to +85°C See data sheet
    MAX6841EUKD2  



    		-40°C to +85°C See data sheet
    MAX6841EUKD4  



    		-40°C to +85°C See data sheet
    MAX6841FUKD1  



    		-40°C to +85°C See data sheet
    MAX6841FUKD2  



    		-40°C to +85°C See data sheet
    MAX6841FUKD4  



    		-40°C to +85°C See data sheet
    MAX6841GUKD0  



    		-40°C to +85°C See data sheet
    MAX6841IUKD4  



    		-40°C to +85°C See data sheet
    MAX6841IUKD2  



    		-40°C to +85°C See data sheet
    MAX6841IUKD0  



    		-40°C to +85°C See data sheet
    MAX6841HUKD4  



    		-40°C to +85°C See data sheet
    MAX6841HUKD2  



    		-40°C to +85°C See data sheet
    MAX6841HUKD1  



    		-40°C to +85°C See data sheet
    MAX6841GUKD2  



    		-40°C to +85°C See data sheet
    MAX6841GUKD1  



    		-40°C to +85°C See data sheet
    MAX6841GUKD4  



    		-40°C to +85°C See data sheet
    MAX6841IUKD3+  
    		SOT-23;5 pin;
    Dwg: 21-0057 (PDF)
    Use pkgcode/variation: U5+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX6841IUKD3+T  
    		SOT-23;5 pin;
    Dwg: 21-0057 (PDF)
    Use pkgcode/variation: U5+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX6841EUKD0+T  
    		SOT-23;5 pin;
    Dwg: 21-0057 (PDF)
    Use pkgcode/variation: U5+1*
    		-40°C to +85°C See data sheet
    Materials Analysis
    MAX6841EUKD0+  
    		SOT-23;5 pin;
    Dwg: 21-0057 (PDF)
    Use pkgcode/variation: U5+1*
    		-40°C to +85°C See data sheet
    Materials Analysis
    MAX6841DUKD4+T  
    		SOT-23;5 pin;
    Dwg: 21-0057 (PDF)
    Use pkgcode/variation: U5+1*
    		-40°C to +85°C See data sheet
    Materials Analysis
    MAX6841DUKD4+  
    		SOT-23;5 pin;
    Dwg: 21-0057 (PDF)
    Use pkgcode/variation: U5+1*
    		-40°C to +85°C See data sheet
    Materials Analysis
    MAX6841HUKD3  
    		SOT-23;5 pin;
    Dwg: 21-0057 (PDF)
    Use pkgcode/variation: U5-1*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX6841DUKD3+  
    		SOT-23;5 pin;
    Dwg: 21-0057 (PDF)
    Use pkgcode/variation: U5+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX6841EUKD0  
    		SOT-23;5 pin;
    Dwg: 21-0057 (PDF)
    Use pkgcode/variation: U5-1*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX6841DUKD4  
    		SOT-23;5 pin;
    Dwg: 21-0057 (PDF)
    Use pkgcode/variation: U5-1*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX6841DUKD3  
    		SOT-23;5 pin;
    Dwg: 21-0057 (PDF)
    Use pkgcode/variation: U5-1*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX6841FUKD3+  
    		SOT-23;5 pin;
    Dwg: 21-0057 (PDF)
    Use pkgcode/variation: U5+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX6841FUKD0  
    		SOT-23;5 pin;
    Dwg: 21-0057 (PDF)
    Use pkgcode/variation: U5-1*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX6841HUKD3+  
    		SOT-23;5 pin;
    Dwg: 21-0057 (PDF)
    Use pkgcode/variation: U5+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX6841FUKD3  
    		SOT-23;5 pin;
    Dwg: 21-0057 (PDF)
    Use pkgcode/variation: U5-1*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX6841FUKD0+  
    		SOT-23;5 pin;
    Dwg: 21-0057 (PDF)
    Use pkgcode/variation: U5+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX6841HUKD0+  
    		SOT-23;5 pin;
    Dwg: 21-0057 (PDF)
    Use pkgcode/variation: U5+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX6841HUKD0  
    		SOT-23;5 pin;
    Dwg: 21-0057 (PDF)
    Use pkgcode/variation: U5-1*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX6841DUKD0+  
    		SOT-23;5 pin;
    Dwg: 21-0057 (PDF)
    Use pkgcode/variation: U5+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX6841DUKD0  
    		SOT-23;5 pin;
    Dwg: 21-0057 (PDF)
    Use pkgcode/variation: U5-1*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX6841IUKD3  
    		SOT-23;5 pin;
    Dwg: 21-0057 (PDF)
    Use pkgcode/variation: U5-1*
    		-40°C to +85°C See data sheet
    Materials Analysis
    MAX6841DUKD2-T  
    		SOT-23;5 pin;
    Dwg: 21-0057 (PDF)
    Use pkgcode/variation: U5-1*
    		See data sheet
    Materials Analysis
    MAX6841IUKD1-T  
    		SOT-23;5 pin;
    Dwg: 21-0057 (PDF)
    Use pkgcode/variation: U5-1*
    		See data sheet
    Materials Analysis
    MAX6841DUKD0+T  
    		SOT-23;5 pin;
    Dwg: 21-0057 (PDF)
    Use pkgcode/variation: U5+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX6841IUKD3-T  
    		SOT-23;5 pin;
    Dwg: 21-0057 (PDF)
    Use pkgcode/variation: U5-1*
    		-40°C to +85°C See data sheet
    Materials Analysis
    MAX6841IUKD2-T  
    		SOT-23;5 pin;
    Dwg: 21-0057 (PDF)
    Use pkgcode/variation: U5-1*
    		-40°C to +85°C See data sheet
    Materials Analysis
    MAX6841HUKD4-T  
    		SOT-23;5 pin;
    Dwg: 21-0057 (PDF)
    Use pkgcode/variation: U5-1*
    		-40°C to +85°C See data sheet
    Materials Analysis
    MAX6841FUKD0+T  
    		SOT-23;5 pin;
    Dwg: 21-0057 (PDF)
    Use pkgcode/variation: U5+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX6841HUKD3-T  
    		SOT-23;5 pin;
    Dwg: 21-0057 (PDF)
    Use pkgcode/variation: U5-1*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX6841HUKD2-T  
    		SOT-23;5 pin;
    Dwg: 21-0057 (PDF)
    Use pkgcode/variation: U5-1*
    		-40°C to +85°C See data sheet
    Materials Analysis
    MAX6841HUKD1-T  
    		SOT-23;5 pin;
    Dwg: 21-0057 (PDF)
    Use pkgcode/variation: U5-1*
    		-40°C to +85°C See data sheet
    Materials Analysis
    MAX6841DUKD3+T  
    		SOT-23;5 pin;
    Dwg: 21-0057 (PDF)
    Use pkgcode/variation: U5+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX6841HUKD0-T  
    		SOT-23;5 pin;
    Dwg: 21-0057 (PDF)
    Use pkgcode/variation: U5-1*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX6841GUKD4-T  
    		SOT-23;5 pin;
    Dwg: 21-0057 (PDF)
    Use pkgcode/variation: U5-1*
    		-40°C to +85°C See data sheet
    Materials Analysis
    MAX6841IUKD4-T  
    		SOT-23;5 pin;
    Dwg: 21-0057 (PDF)
    Use pkgcode/variation: U5-1*
    		-40°C to +85°C See data sheet
    Materials Analysis
    MAX6841FUKD3+T  
    		SOT-23;5 pin;
    Dwg: 21-0057 (PDF)
    Use pkgcode/variation: U5+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX6841HUKD0+T  
    		SOT-23;5 pin;
    Dwg: 21-0057 (PDF)
    Use pkgcode/variation: U5+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX6841EUKD4-T  
    		SOT-23;5 pin;
    Dwg: 21-0057 (PDF)
    Use pkgcode/variation: U5-1*
    		-40°C to +85°C See data sheet
    Materials Analysis
    MAX6841EUKD2-T  
    		SOT-23;5 pin;
    Dwg: 21-0057 (PDF)
    Use pkgcode/variation: U5-1*
    		-40°C to +85°C See data sheet
    Materials Analysis
    MAX6841EUKD1-T  
    		SOT-23;5 pin;
    Dwg: 21-0057 (PDF)
    Use pkgcode/variation: U5-1*
    		-40°C to +85°C See data sheet
    Materials Analysis
    MAX6841EUKD0-T  
    		SOT-23;5 pin;
    Dwg: 21-0057 (PDF)
    Use pkgcode/variation: U5-1*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX6841DUKD4-T  
    		SOT-23;5 pin;
    Dwg: 21-0057 (PDF)
    Use pkgcode/variation: U5-1*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX6841DUKD3-T  
    		SOT-23;5 pin;
    Dwg: 21-0057 (PDF)
    Use pkgcode/variation: U5-1*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis

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    More Information
  		• Topmark Coding: MAX6841 MAX6842 MAX6843 MAX6844 MAX6845
  		• New Product Press Release 2002-11-19 

    Related Products
    MAX6832, MAX6833, MAX6834, MAX6835, MAX6836, MAX6837, MAX6838, MAX6839, MAX6840 Ultra-Low-Voltage SC70 Voltage Detectors and µP Reset Circuits

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