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Maxim > Products > Supervisors, Voltage Monitors, Sequencers 
MAX16016, MAX16020, MAX16021
Low-Power μP Supervisory Circuits with Battery-Backup Circuit and Chip-Enable Gating

Industry's Most Sophisticated Battery-Backup Supervisory Circuits with Chip-Enable Gating and Power-Supply Monitoring


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Data Sheet
FULL DATA SHEET (PDF, 216kB)
Download this datasheet in PDF formatDownload   Send this datasheet to any email addressE-Mail

Description
The MAX16016/MAX16020/MAX16021 supervisory circuits monitor power supplies, provide battery-backup control, and chip-enable (CE) gating to write protect memory in microprocessor (µP)-based systems. These low-power devices improve system reliability by providing several supervisory functions in a small, single integrated solution.

The MAX16016/MAX16020/MAX16021 perform four basic system functions:
  1. Provide a µP reset output during VCC supply powerup, power-down, and brownout conditions.
  2. Control VCC to battery-backup switching internally to maintain data or low-power operation for memories, real-time clocks (RTCs), and other digital logic when the main power is removed.
  3. Provide memory write protection through internal chip-enable gating during brownout.
  4. Provide a combination of additional supervisory functions listed in the Features section in the full data sheet.
The MAX16016/MAX16020/MAX16021 operate from a 1.53V to 5.5V supply voltage and offer fixed reset thresholds for monitoring 5V, 3.3V, 3V, 2.5V, and 1.8V systems. Each device is available with either a pushpull or open-drain reset output.

The MAX16016/MAX16020/MAX16021 are available in small TDFN/TQFN packages and are fully specified for an operating temperature range of -40°C to +85°C.

Key Features   Applications/Uses
  • System Monitoring for 5V, 3.3V, 3V, 2.5V, or 1.8V Power-Supply Voltages
  • 1.53V to 5.5V Operating Voltage Range
  • Low 1.2µA Supply Current (0.25µA in Battery-Backup Mode)
  • 145ms (min) Reset Timeout Period
  • Battery Freshness Seal
  • On-Board Gating of CE Signals, 1.5ns Propagation Delay (MAX16020/MAX16021)
  • Debounced Manual Reset Input
  • Watchdog Timer, 1.2s (typ) Timeout
  • Power-Fail Comparator and Low-Line Indicator for Monitoring Voltages Down to 0.6V
  • Battery-On, Battery-OK, and Battery Test Indicators
  • Small 10-Pin TDFN or 16-Pin TQFN Packages
  • UL®-Certified to Conform to IEC60950-1
  • Underwriters Laboratories (UL®) Recognized

  
  		• GPS Systems
  		• Industrial Control
  		• Main/Backup Power for RTCs, CMOS Memories
  		• Point-of-Sale Equipment
  		• Portable/Battery Equipment
  		• Set-Top Boxes

    Key Specifications:   Battery Backup Circuits
    Part Number Reset Threshold Range (V) Active-Low Reset Output Active-High Reset Output Max. ICC (µA) Features RoHS Available Package Operating Temp. Range (°C) Price**
    MAX16016  NEW! 1.2 to 1.8
    1.8 to 2.5
    2.5 to 3.3
    3.3 to 5.5     		Open Drain
    Push-Pull     		 -  5
    •Batt Freshness Seal
    •Battery On
    •Manual Reset
    •Power Fail Comparator
    •Watchdog
    		 Yes THIN QFN (Dual)/10 -40 to +85 $2.48 @ 1k
    MAX16020  NEW!  - 
    •Batt Freshness Seal
    •Battery On
    •Chip Enable Gate
    •Low Line
    •Manual Reset
    •Power Fail Comparator
    •Watchdog
    		 THIN QFN/16 $3.05 @ 1k
    MAX16021  NEW! Open Drain
    Push-Pull
    •Batt Freshness Seal
    •Battery On
    •Chip Enable Gate
    •Low Line
    •Manual Reset
    •Power Fail Comparator
    •Watchdog
    		 THIN QFN/16 $2.97 @ 1k
    See All Battery Backup Circuits (92)
    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
    MAX16016, MAX16020, MAX16021: Typical Application Circuit
    Typical Application Circuit

    Evaluation Kits
    none

    Design Guides
  		• Battery Management (PDF)

    Reliability Reports
  		• Show FIT data for:
  		• Request Reliability Report for:
  		• Underwriters Laboratories (UL®) Recognized

    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: 1-78 of 78

    MAX16016 Free
    Sample    		 Buy
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX16016PTBM+T  



    		-40°C to +85°C See data sheet
    MAX16016PTBR+T  



    		-40°C to +85°C See data sheet
    MAX16016PTBS+T  



    		-40°C to +85°C See data sheet
    MAX16016PTBL+T  



    		-40°C to +85°C See data sheet
    MAX16016LTBZ+T  



    		-40°C to +85°C See data sheet
    MAX16016LTBY+T  



    		-40°C to +85°C See data sheet
    MAX16016LTBW+T  



    		-40°C to +85°C See data sheet
    MAX16016PTBW+T  



    		-40°C to +85°C See data sheet
    MAX16016PTBY+T  



    		-40°C to +85°C See data sheet
    MAX16016LTBM+T  



    		-40°C to +85°C See data sheet
    MAX16016LTBV+T  



    		-40°C to +85°C See data sheet
    MAX16016LTBT+T  



    		-40°C to +85°C See data sheet
    MAX16016PTBT+  
    		TDFN;10 pin;
    Dwg: 21-0137 (PDF)
    Use pkgcode/variation: T1033+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX16016PTBZ+T  
    		TDFN;10 pin;
    Dwg: 21-0137 (PDF)
    Use pkgcode/variation: T1033+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX16016PTBZ+  
    		TDFN;10 pin;
    Dwg: 21-0137 (PDF)
    Use pkgcode/variation: T1033+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX16016PTBT+T  
    		TDFN;10 pin;
    Dwg: 21-0137 (PDF)
    Use pkgcode/variation: T1033+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX16016LTBS+T  
    		TDFN;10 pin;
    Dwg: 21-0137 (PDF)
    Use pkgcode/variation: T1033+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX16016PTBV+T  
    		TDFN;10 pin;
    Dwg: 21-0137 (PDF)
    Use pkgcode/variation: T1033+1*
    		-40°C to +85°C See data sheet
    Materials Analysis
    MAX16016LTBS+  
    		TDFN;10 pin;
    Dwg: 21-0137 (PDF)
    Use pkgcode/variation: T1033+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX16016PTBV+  
    		TDFN;10 pin;
    Dwg: 21-0137 (PDF)
    Use pkgcode/variation: T1033+1*
    		-40°C to +85°C See data sheet
    Materials Analysis
    MAX16016LTBR+T  
    		TDFN;10 pin;
    Dwg: 21-0137 (PDF)
    Use pkgcode/variation: T1033+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX16016LTBR+  
    		TDFN;10 pin;
    Dwg: 21-0137 (PDF)
    Use pkgcode/variation: T1033+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX16016LTBL+T  
    		TDFN;10 pin;
    Dwg: 21-0137 (PDF)
    Use pkgcode/variation: T1033+1*
    		-40°C to +85°C See data sheet
    Materials Analysis
    MAX16016LTBL+  
    		TDFN;10 pin;
    Dwg: 21-0137 (PDF)
    Use pkgcode/variation: T1033+1*
    		-40°C to +85°C See data sheet
    Materials Analysis
    MAX16020 Free
    Sample    		 Buy
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX16020PTER+T  



    		-40°C to +85°C See data sheet
    MAX16020LTEV+T  



    		-40°C to +85°C See data sheet
    MAX16020PTET+T  



    		-40°C to +85°C See data sheet
    MAX16020PTEZ+T  



    		-40°C to +85°C See data sheet
    MAX16020PTEM+T  



    		-40°C to +85°C See data sheet
    MAX16020PTEY+T  



    		-40°C to +85°C See data sheet
    MAX16020PTEL+T  



    		-40°C to +85°C See data sheet
    MAX16020PTES+T  



    		-40°C to +85°C See data sheet
    MAX16020LTEZ+T  



    		-40°C to +85°C See data sheet
    MAX16020PTEV+T  



    		-40°C to +85°C See data sheet
    MAX16020PTEW+T  



    		-40°C to +85°C See data sheet
    MAX16020LTEW+T  



    		-40°C to +85°C See data sheet
    MAX16020LTEY+T  



    		-40°C to +85°C See data sheet
    MAX16020LTET+T  



    		-40°C to +85°C See data sheet
    MAX16020LTEM+T  



    		-40°C to +85°C See data sheet
    MAX16020LTES+T  
    		THIN QFN;16 pin;
    Dwg: 21-0139 (PDF)
    Use pkgcode/variation: T1644+4*
    		-40°C to +85°C See data sheet
    Materials Analysis
    MAX16020LTEL+T  
    		THIN QFN;16 pin;
    Dwg: 21-0139 (PDF)
    Use pkgcode/variation: T1644+4*
    		-40°C to +85°C See data sheet
    Materials Analysis
    MAX16020LTER+T  
    		THIN QFN;16 pin;
    Dwg: 21-0139 (PDF)
    Use pkgcode/variation: T1644+4*
    		-40°C to +85°C See data sheet
    Materials Analysis
    MAX16021 Free
    Sample    		 Buy
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX16021LTEW+T  



    		-40°C to +85°C See data sheet
    MAX16021LTEY+T  



    		-40°C to +85°C See data sheet
    MAX16021LTEZ+T  



    		-40°C to +85°C See data sheet
    MAX16021PTEL+T  



    		-40°C to +85°C See data sheet
    MAX16021PTER+T  



    		-40°C to +85°C See data sheet
    MAX16021PTES+T  



    		-40°C to +85°C See data sheet
    MAX16021PTEZ+T  



    		-40°C to +85°C See data sheet
    MAX16021PTEW+T  



    		-40°C to +85°C See data sheet
    MAX16021PTEY+T  



    		-40°C to +85°C See data sheet
    MAX16021LTEV+T  



    		-40°C to +85°C See data sheet
    MAX16021LTET+T  



    		-40°C to +85°C See data sheet
    MAX16021LTEM+T  



    		-40°C to +85°C See data sheet
    MAX16021LTEV+  
    		THIN QFN;16 pin;
    Dwg: 21-0139 (PDF)
    Use pkgcode/variation: T1644+4*
    		-40°C to +85°C See data sheet
    Materials Analysis
    MAX16021LTEM+  
    		THIN QFN;16 pin;
    Dwg: 21-0139 (PDF)
    Use pkgcode/variation: T1644+4*
    		-40°C to +85°C See data sheet
    Materials Analysis
    MAX16021PTET+T  
    		THIN QFN;16 pin;
    Dwg: 21-0139 (PDF)
    Use pkgcode/variation: T1644+4*
    		-40°C to +85°C See data sheet
    Materials Analysis
    MAX16021PTEV+  
    		THIN QFN;16 pin;
    Dwg: 21-0139 (PDF)
    Use pkgcode/variation: T1644+4*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX16021PTEV+T  
    		THIN QFN;16 pin;
    Dwg: 21-0139 (PDF)
    Use pkgcode/variation: T1644+4*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX16021PTEW+  
    		THIN QFN;16 pin;
    Dwg: 21-0139 (PDF)
    Use pkgcode/variation: T1644+4*
    		-40°C to +85°C See data sheet
    Materials Analysis
    MAX16021LTEL+T  
    		THIN QFN;16 pin;
    Dwg: 21-0139 (PDF)
    Use pkgcode/variation: T1644+4*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX16021PTEY+  
    		THIN QFN;16 pin;
    Dwg: 21-0139 (PDF)
    Use pkgcode/variation: T1644+4*
    		-40°C to +85°C See data sheet
    Materials Analysis
    MAX16021LTEL+  
    		THIN QFN;16 pin;
    Dwg: 21-0139 (PDF)
    Use pkgcode/variation: T1644+4*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX16021PTEZ+  
    		THIN QFN;16 pin;
    Dwg: 21-0139 (PDF)
    Use pkgcode/variation: T1644+4*
    		-40°C to +85°C See data sheet
    Materials Analysis
    MAX16021PTES+  
    		THIN QFN;16 pin;
    Dwg: 21-0139 (PDF)
    Use pkgcode/variation: T1644+4*
    		-40°C to +85°C See data sheet
    Materials Analysis
    MAX16021LTER+  
    		THIN QFN;16 pin;
    Dwg: 21-0139 (PDF)
    Use pkgcode/variation: T1644+4*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX16021PTER+  
    		THIN QFN;16 pin;
    Dwg: 21-0139 (PDF)
    Use pkgcode/variation: T1644+4*
    		-40°C to +85°C See data sheet
    Materials Analysis
    MAX16021LTEW+  
    		THIN QFN;16 pin;
    Dwg: 21-0139 (PDF)
    Use pkgcode/variation: T1644+4*
    		-40°C to +85°C See data sheet
    Materials Analysis
    MAX16021LTET+  
    		THIN QFN;16 pin;
    Dwg: 21-0139 (PDF)
    Use pkgcode/variation: T1644+4*
    		-40°C to +85°C See data sheet
    Materials Analysis
    MAX16021LTEY+  
    		THIN QFN;16 pin;
    Dwg: 21-0139 (PDF)
    Use pkgcode/variation: T1644+4*
    		-40°C to +85°C See data sheet
    Materials Analysis
    MAX16021LTES+T  
    		THIN QFN;16 pin;
    Dwg: 21-0139 (PDF)
    Use pkgcode/variation: T1644+4*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX16021LTEZ+  
    		THIN QFN;16 pin;
    Dwg: 21-0139 (PDF)
    Use pkgcode/variation: T1644+4*
    		-40°C to +85°C See data sheet
    Materials Analysis
    MAX16021LTES+  
    		THIN QFN;16 pin;
    Dwg: 21-0139 (PDF)
    Use pkgcode/variation: T1644+4*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX16021PTEL+  
    		THIN QFN;16 pin;
    Dwg: 21-0139 (PDF)
    Use pkgcode/variation: T1644+4*
    		-40°C to +85°C See data sheet
    Materials Analysis
    MAX16021LTER+T  
    		THIN QFN;16 pin;
    Dwg: 21-0139 (PDF)
    Use pkgcode/variation: T1644+4*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX16021PTEM+  
    		THIN QFN;16 pin;
    Dwg: 21-0139 (PDF)
    Use pkgcode/variation: T1644+4*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX16021PTEM+T  
    		THIN QFN;16 pin;
    Dwg: 21-0139 (PDF)
    Use pkgcode/variation: T1644+4*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX16021PTET+  
    		THIN QFN;16 pin;
    Dwg: 21-0139 (PDF)
    Use pkgcode/variation: T1644+4*
    		-40°C to +85°C See data sheet
    Materials Analysis

    Related Products
    MAX16033, MAX16034, MAX16035, MAX16036, MAX16037, MAX16038, MAX16039, MAX16040 Low-Power Battery Backup Circuits in Small µDFN Packages

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    Document Ref.: 19-4145; Rev 2; 2008-10-09
    This page last modified: 2008-10-09




             


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