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Maxim > Products > [Supervisors, Voltage Monitors, Sequencers]  [Automotive] 
MAX690R, MAX690S, MAX690T, MAX704R, MAX704S, MAX704T, MAX802, MAX802R, MAX802S, MAX802T, MAX804, MAX804R, MAX804S, MAX804T, MAX805, MAX805R, MAX805S, MAX805T, MAX806, MAX806R, MAX806S, MAX806T
3.0V/3.3V Microprocessor Supervisory Circuits

Industry's-First Battery-Backup Supervisor for 3.3V/3.0V Systems


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Status
Active: In Production.

Description
FULL DATA SHEET (PDF, 288kB)
Download this datasheet in PDF formatDownload   Send this datasheet to any email addressE-Mail
These microprocessor (µP) supervisory circuits reduce the complexity and number of components required for power-supply monitoring and battery-control functions in µP systems. They significantly improve system reliability and accuracy compared to separate ICs or discrete components.

These devices are designed for use in systems powered by 3.0V or 3.3V supplies. See the selector guide in the back of this data sheet for similar devices designed for 5V systems. The suffixes denote different reset threshold voltages: 3.075V (T), 2.925V (S), and 2.625V (R) (see Reset Threshold section in the Detailed Description). All these parts are available in 8-pin DIP and SO packages. Functions offered in this series are as follows:

Key Features   Applications/Uses
  • Active-Low RESET and RESET Outputs
  • Manual Reset Input
  • Precision Supply-Voltage Monitor
  • 200ms Reset Time Delay
  • Watchdog Timer (1.6sec timeout)
  • Battery-Backup Power Switching-Battery Can Exceed VCC in Normal Operation
  • 40µA VCC Supply Current
  • 1µA Battery Supply Current
  • Voltage Monitor for Power-Fail or Low-Battery Warning
  • Guaranteed Active-Low RESET Assertion to VCC = 1V
  • 8-Pin DIP and SO Packages
  • Underwriters Laboratories (UL®) Recognized
  
  • Automotive Electronics
  • Battery-Powered Computers/Controllers
  • Critical µP Monitoring
  • Embedded Controllers
  • Intelligent Instruments
  • Portable Equipment

Key Specifications:  Battery Backup Circuits
Part Number Reset Thresh.
(V)		 Reset Out Reset Out ICC
(µA)		 Features Industry Qualified Oper. Temp.
(°C)		 Package/Pins Smallest Available Pckg.
(mm2)		 Price
Active Low Active High max max w/pins See Notes
MAX690R  2.5 to 3.0 Push-Pull - 50
Adjustable Reset Input
Power Fail Comparator
Watchdog
 -
-55 to +125
-40 to +85
0 to +70
CDIP(N)/8
PDIP(N)/8
SOIC(N)/8
 79.7 $3.23 @1k
MAX690S  2.5 to 3.0 Push-Pull -
Adjustable Reset Input
Power Fail Comparator
Watchdog
 -
CDIP(N)/8
PDIP(N)/8
SOIC(N)/8
 79.7 $3.23 @1k
MAX690T  3.0 to 3.5 Push-Pull -
Adjustable Reset Input
Power Fail Comparator
Watchdog
 -
CDIP(N)/8
PDIP(N)/8
SOIC(N)/8
 79.7 $3.23 @1k
MAX704R  2.5 to 3.0 Push-Pull -
Adjustable Reset Input
Manual Reset
Power Fail Comparator
 Automotive - General
CDIP(N)/8
PDIP(N)/8
SOIC(N)/8
 79.7 $2.93 @1k
MAX704S  2.5 to 3.0 Push-Pull -
Adjustable Reset Input
Manual Reset
Power Fail Comparator
 Automotive - General
CDIP(N)/8
PDIP(N)/8
SOIC(N)/8
 79.7 $2.93 @1k
MAX704T  3.0 to 3.5 Push-Pull -
Adjustable Reset Input
Manual Reset
Power Fail Comparator
 Automotive - General
CDIP(N)/8
PDIP(N)/8
SOIC(N)/8
 79.7 $2.93 @1k
MAX802R  2.5 to 3.0 Push-Pull -
Adjustable Reset Input
Power Fail Comparator
Watchdog
 Automotive - General
CDIP(N)/8
PDIP(N)/8
SOIC(N)/8
 30.9 $3.90 @1k
MAX802S  2.5 to 3.0 Push-Pull -
Adjustable Reset Input
Power Fail Comparator
Watchdog
 Automotive - General
CDIP(N)/8
PDIP(N)/8
SOIC(N)/8
 30.9 $3.90 @1k
MAX802T  3.0 to 3.5 Push-Pull -
Adjustable Reset Input
Power Fail Comparator
Watchdog
 Automotive - General
CDIP(N)/8
PDIP(N)/8
SOIC(N)/8
 30.9 $3.90 @1k
MAX804  2.5 to 3.3 Open Drain Open Drain
Adjustable Reset Input
Power Fail Comparator
Watchdog
 Automotive - General
CDIP(N)/8
PDIP(N)/8
SOIC(N)/8
 30.9 $3.66 @1k
MAX805R  2.5 to 3.0 - Open Drain
Adjustable Reset Input
Power Fail Comparator
Watchdog
 Automotive - General
CDIP(N)/8
PDIP(N)/8
SOIC(N)/8
 30.9 $3.23 @1k
MAX805S  2.5 to 3.0 - Open Drain
Adjustable Reset Input
Power Fail Comparator
Watchdog
 Automotive - General
CDIP(N)/8
PDIP(N)/8
SOIC(N)/8
 30.9 $3.23 @1k
MAX805T  3.0 to 3.5 - Open Drain
Adjustable Reset Input
Power Fail Comparator
Watchdog
 Automotive - General
CDIP(N)/8
PDIP(N)/8
SOIC(N)/8
 30.9 $3.23 @1k
MAX806  2.5 to 3.3 Push-Pull -
Adjustable Reset Input
Manual Reset
Power Fail Comparator
 Automotive - General
CDIP(N)/8
PDIP(N)/8
SOIC(N)/8
 79.7 $3.90 @1k
See All Battery Backup Circuits (86)

Diagram
MAX690R, MAX690S, MAX690T, MAX704R, MAX704S, MAX704T, MAX802, MAX802R, MAX802S, MAX802T, MAX804, MAX804R, MAX804S, MAX804T, MAX805, MAX805R, MAX805S, MAX805T, MAX806R, MAX806S, MAX806T: Typical Operating Circuit
Typical Operating Circuit

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    Document Ref.: 19-0243; Rev 2; 2006-06-06
    This page last modified: 2009-08-19


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