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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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Status
Active: In Production.

Data Sheet
FULL DATA SHEET (PDF, 212kB)
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 power-up, 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 push-pull 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
  • 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 Thresh.
    (V)    		 Reset Out Reset Out ICC
    (µA)    		 Features Package/Pins Smallest Available Pckg.
    (mm2)    		 Oper. Temp.
    (°C)    		 Price
    Active Low Active High max max w/pins See Notes
    MAX16016 
    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
    TDFN-EP/10
    		 10 -40 to +85 $2.48 @1k
    MAX16020  -
    Batt Freshness Seal
    Battery On
    Chip Enable Gate
    Low Line
    Manual Reset
    Power Fail Comparator
    Watchdog
    TQFN/16
    		 17 $3.05 @1k
    MAX16021 
    Open Drain
    Push-Pull
    Batt Freshness Seal
    Battery On
    Chip Enable Gate
    Low Line
    Manual Reset
    Power Fail Comparator
    Watchdog
    TQFN/16
    		 17 $2.97 @1k
    See All Battery Backup Circuits (86)

    Diagram
    MAX16016, MAX16020, MAX16021: Typical Application Circuit
    Typical Application Circuit

    Design Guides
  		• Battery Management (PDF)

    Reliability Reports
  		• Reliability Report: MAX16016.pdf MAX16020.pdf MAX16021.pdf
  		• Show FIT data 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 Status
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX16016PTBS+T    
    		Active

    Land Pattern: Not Available

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

    Land Pattern: Not Available

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

    Land Pattern: Not Available

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

    Land Pattern: Not Available

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

    Land Pattern: Not Available

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

    Land Pattern: Not Available

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

    Land Pattern: Not Available

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

    Land Pattern: Not Available

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

    Land Pattern: Not Available

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

    Land Pattern: Not Available

    		-40°C to +85°C See data sheet
    MAX16016PTBM+T    
    		Active

    Land Pattern: Not Available

    		-40°C to +85°C See data sheet
    MAX16016PTBZ+    
    		Active TDFN-EP;10 pin;10 mm²
    Outline Drawing: 21-0137 (PDF)
    Land Pattern: 90-0003 (PDF)
    Use pkgcode/variation: T1033+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX16016PTBZ+T    
    		Active TDFN-EP;10 pin;10 mm²
    Outline Drawing: 21-0137 (PDF)
    Land Pattern: 90-0003 (PDF)
    Use pkgcode/variation: T1033+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX16016PTBT+  
    		Active TDFN-EP;10 pin;10 mm²
    Outline Drawing: 21-0137 (PDF)
    Land Pattern: 90-0003 (PDF)
    Use pkgcode/variation: T1033+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX16016PTBV+    
    		Active TDFN-EP;10 pin;10 mm²
    Outline Drawing: 21-0137 (PDF)
    Land Pattern: 90-0003 (PDF)
    Use pkgcode/variation: T1033+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX16016LTBL+  
    		Active TDFN-EP;10 pin;10 mm²
    Outline Drawing: 21-0137 (PDF)
    Land Pattern: 90-0003 (PDF)
    Use pkgcode/variation: T1033+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX16016LTBL+T    
    		Active TDFN-EP;10 pin;10 mm²
    Outline Drawing: 21-0137 (PDF)
    Land Pattern: 90-0003 (PDF)
    Use pkgcode/variation: T1033+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX16016LTBM+T    
    		Active TDFN-EP;10 pin;10 mm²
    Outline Drawing: 21-0137 (PDF)
    Land Pattern: 90-0003 (PDF)
    Use pkgcode/variation: T1033+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX16016LTBR+    
    		Active TDFN-EP;10 pin;10 mm²
    Outline Drawing: 21-0137 (PDF)
    Land Pattern: 90-0003 (PDF)
    Use pkgcode/variation: T1033+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX16016LTBR+T    
    		Active TDFN-EP;10 pin;10 mm²
    Outline Drawing: 21-0137 (PDF)
    Land Pattern: 90-0003 (PDF)
    Use pkgcode/variation: T1033+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX16016LTBS+  
    		Active TDFN-EP;10 pin;10 mm²
    Outline Drawing: 21-0137 (PDF)
    Land Pattern: 90-0003 (PDF)
    Use pkgcode/variation: T1033+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX16016LTBS+T    
    		Active TDFN-EP;10 pin;10 mm²
    Outline Drawing: 21-0137 (PDF)
    Land Pattern: 90-0003 (PDF)
    Use pkgcode/variation: T1033+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX16016PTBV+T    
    		Active TDFN-EP;10 pin;10 mm²
    Outline Drawing: 21-0137 (PDF)
    Land Pattern: 90-0003 (PDF)
    Use pkgcode/variation: T1033+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX16016PTBT+T    
    		Active TDFN-EP;10 pin;10 mm²
    Outline Drawing: 21-0137 (PDF)
    Land Pattern: 90-0003 (PDF)
    Use pkgcode/variation: T1033+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX16020 Free
    Sample    		 Buy Status
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX16020PTET+T    
    		Active

    Land Pattern: Not Available

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

    Land Pattern: Not Available

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

    Land Pattern: Not Available

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

    Land Pattern: Not Available

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

    Land Pattern: Not Available

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

    Land Pattern: Not Available

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

    Land Pattern: Not Available

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

    Land Pattern: Not Available

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

    Land Pattern: Not Available

    		-40°C to +85°C See data sheet
    MAX16020PTER+T    
    		Active

    Land Pattern: Not Available

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

    Land Pattern: Not Available

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

    Land Pattern: Not Available

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

    Land Pattern: Not Available

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

    Land Pattern: Not Available

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

    Land Pattern: Not Available

    		-40°C to +85°C See data sheet
    MAX16020LTER+T    
    		Active TQFN;16 pin;17 mm²
    Outline Drawing: 21-0139 (PDF)
    Land Pattern: 90-0070 (PDF)
    Use pkgcode/variation: T1644+4*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX16020LTEL+T    
    		Active TQFN;16 pin;17 mm²
    Outline Drawing: 21-0139 (PDF)
    Land Pattern: 90-0070 (PDF)
    Use pkgcode/variation: T1644+4*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX16020LTES+T    
    		Active TQFN;16 pin;17 mm²
    Outline Drawing: 21-0139 (PDF)
    Land Pattern: 90-0070 (PDF)
    Use pkgcode/variation: T1644+4*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX16021 Free
    Sample    		 Buy Status
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX16021LTEM+T    
    		Active

    Land Pattern: Not Available

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

    Land Pattern: Not Available

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

    Land Pattern: Not Available

    		-40°C to +85°C See data sheet
    MAX16021LTEW+T    
    		Active

    Land Pattern: Not Available

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

    Land Pattern: Not Available

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

    Land Pattern: Not Available

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

    Land Pattern: Not Available

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

    Land Pattern: Not Available

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

    Land Pattern: Not Available

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

    Land Pattern: Not Available

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

    Land Pattern: Not Available

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

    Land Pattern: Not Available

    		-40°C to +85°C See data sheet
    MAX16021LTEL+  
    		Active TQFN;16 pin;17 mm²
    Outline Drawing: 21-0139 (PDF)
    Land Pattern: 90-0070 (PDF)
    Use pkgcode/variation: T1644+4*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX16021LTEL+T    
    		Active TQFN;16 pin;17 mm²
    Outline Drawing: 21-0139 (PDF)
    Land Pattern: 90-0070 (PDF)
    Use pkgcode/variation: T1644+4*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX16021LTEM+    
    		Active TQFN;16 pin;17 mm²
    Outline Drawing: 21-0139 (PDF)
    Land Pattern: 90-0070 (PDF)
    Use pkgcode/variation: T1644+4*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX16021LTER+  
    		Active TQFN;16 pin;17 mm²
    Outline Drawing: 21-0139 (PDF)
    Land Pattern: 90-0070 (PDF)
    Use pkgcode/variation: T1644+4*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX16021LTER+T    
    		Active TQFN;16 pin;17 mm²
    Outline Drawing: 21-0139 (PDF)
    Land Pattern: 90-0070 (PDF)
    Use pkgcode/variation: T1644+4*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX16021LTES+  
    		Active TQFN;16 pin;17 mm²
    Outline Drawing: 21-0139 (PDF)
    Land Pattern: 90-0070 (PDF)
    Use pkgcode/variation: T1644+4*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX16021LTES+T    
    		Active TQFN;16 pin;17 mm²
    Outline Drawing: 21-0139 (PDF)
    Land Pattern: 90-0070 (PDF)
    Use pkgcode/variation: T1644+4*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX16021LTET+    
    		Active TQFN;16 pin;17 mm²
    Outline Drawing: 21-0139 (PDF)
    Land Pattern: 90-0070 (PDF)
    Use pkgcode/variation: T1644+4*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX16021LTEV+    
    		Active TQFN;16 pin;17 mm²
    Outline Drawing: 21-0139 (PDF)
    Land Pattern: 90-0070 (PDF)
    Use pkgcode/variation: T1644+4*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX16021LTEW+    
    		Active TQFN;16 pin;17 mm²
    Outline Drawing: 21-0139 (PDF)
    Land Pattern: 90-0070 (PDF)
    Use pkgcode/variation: T1644+4*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX16021LTEY+    
    		Active TQFN;16 pin;17 mm²
    Outline Drawing: 21-0139 (PDF)
    Land Pattern: 90-0070 (PDF)
    Use pkgcode/variation: T1644+4*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX16021LTEZ+    
    		Active TQFN;16 pin;17 mm²
    Outline Drawing: 21-0139 (PDF)
    Land Pattern: 90-0070 (PDF)
    Use pkgcode/variation: T1644+4*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX16021PTEL+  
    		Active TQFN;16 pin;17 mm²
    Outline Drawing: 21-0139 (PDF)
    Land Pattern: 90-0070 (PDF)
    Use pkgcode/variation: T1644+4*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX16021PTEM+  
    		Active TQFN;16 pin;17 mm²
    Outline Drawing: 21-0139 (PDF)
    Land Pattern: 90-0070 (PDF)
    Use pkgcode/variation: T1644+4*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX16021PTEM+T    
    		Active TQFN;16 pin;17 mm²
    Outline Drawing: 21-0139 (PDF)
    Land Pattern: 90-0070 (PDF)
    Use pkgcode/variation: T1644+4*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX16021PTER+    
    		Active TQFN;16 pin;17 mm²
    Outline Drawing: 21-0139 (PDF)
    Land Pattern: 90-0070 (PDF)
    Use pkgcode/variation: T1644+4*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX16021PTES+  
    		Active TQFN;16 pin;17 mm²
    Outline Drawing: 21-0139 (PDF)
    Land Pattern: 90-0070 (PDF)
    Use pkgcode/variation: T1644+4*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX16021PTET+    
    		Active TQFN;16 pin;17 mm²
    Outline Drawing: 21-0139 (PDF)
    Land Pattern: 90-0070 (PDF)
    Use pkgcode/variation: T1644+4*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX16021PTET+T    
    		Active TQFN;16 pin;17 mm²
    Outline Drawing: 21-0139 (PDF)
    Land Pattern: 90-0070 (PDF)
    Use pkgcode/variation: T1644+4*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX16021PTEV+    
    		Active TQFN;16 pin;17 mm²
    Outline Drawing: 21-0139 (PDF)
    Land Pattern: 90-0070 (PDF)
    Use pkgcode/variation: T1644+4*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX16021PTEV+T    
    		Active TQFN;16 pin;17 mm²
    Outline Drawing: 21-0139 (PDF)
    Land Pattern: 90-0070 (PDF)
    Use pkgcode/variation: T1644+4*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX16021PTEW+    
    		Active TQFN;16 pin;17 mm²
    Outline Drawing: 21-0139 (PDF)
    Land Pattern: 90-0070 (PDF)
    Use pkgcode/variation: T1644+4*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX16021PTEY+    
    		Active TQFN;16 pin;17 mm²
    Outline Drawing: 21-0139 (PDF)
    Land Pattern: 90-0070 (PDF)
    Use pkgcode/variation: T1644+4*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX16021PTEZ+    
    		Active TQFN;16 pin;17 mm²
    Outline Drawing: 21-0139 (PDF)
    Land Pattern: 90-0070 (PDF)
    Use pkgcode/variation: T1644+4*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis

    More Information
  		• Topmark Coding: MAX16021
  		• New Product Press Release 2009-02-16 

    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 3; 2009-01-28
    This page last modified: 2009-04-10


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