Maxim > Products > Automotive > MAX690R, MAX690S, MAX690T, ...
Maxim > Products > Supervisors, Voltage Monitors, Sequencers > MAX690R, MAX690S, MAX690T, ...

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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Active: In Production.

Description

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:

  

Data Sheet

Download this datasheet in PDF formatDownload Rev 2 (PDF, 288kB)
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Key Features

  • 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
  

Applications/Uses

  • 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 ICC
(µA)		 Features Industry Qualified Oper. Temp.
(°C)		 Package/Pins Smallest Available Pckg.
(mm2)		 Budgetary Price
max max w/pins See Notes
MAX690R  2.5 to 3.0
Active Low
Push-Pull
 50
Adjustable Reset Input
Power Fail Comparator
Watchdog
 Automotive - General
-55 to +125
-40 to +85
0 to +70
CDIP(N)/8
PDIP(N)/8
SOIC(N)/8
 30.9 $3.29 @1k
MAX690S  2.5 to 3.0
Active Low
Push-Pull
Adjustable Reset Input
Power Fail Comparator
Watchdog
CDIP(N)/8
PDIP(N)/8
SOIC(N)/8
 $3.29 @1k
MAX690T  3.0 to 3.5
Active Low
Push-Pull
Adjustable Reset Input
Power Fail Comparator
Watchdog
CDIP(N)/8
PDIP(N)/8
SOIC(N)/8
 $3.29 @1k
MAX704R  2.5 to 3.0
Active Low
Push-Pull
Adjustable Reset Input
Manual Reset
Power Fail Comparator
CDIP(N)/8
PDIP(N)/8
SOIC(N)/8
 $3.01 @1k
MAX704S  2.5 to 3.0
Active Low
Push-Pull
Adjustable Reset Input
Manual Reset
Power Fail Comparator
CDIP(N)/8
PDIP(N)/8
SOIC(N)/8
 $3.01 @1k
MAX704T  3.0 to 3.5
Active Low
Push-Pull
Adjustable Reset Input
Manual Reset
Power Fail Comparator
CDIP(N)/8
PDIP(N)/8
SOIC(N)/8
 $3.01 @1k
MAX802R  2.5 to 3.0
Active Low
Push-Pull
Adjustable Reset Input
Power Fail Comparator
Watchdog
CDIP(N)/8
PDIP(N)/8
SOIC(N)/8
 $4.54 @1k
MAX802S  2.5 to 3.0
Active Low
Push-Pull
Adjustable Reset Input
Power Fail Comparator
Watchdog
CDIP(N)/8
PDIP(N)/8
SOIC(N)/8
 $4.54 @1k
MAX802T  3.0 to 3.5
Active Low
Push-Pull
Adjustable Reset Input
Power Fail Comparator
Watchdog
CDIP(N)/8
PDIP(N)/8
SOIC(N)/8
 $4.54 @1k
MAX804  2.5 to 3.3
Active High
Active Low
Open Drain
Adjustable Reset Input
Power Fail Comparator
Watchdog
CDIP(N)/8
PDIP(N)/8
SOIC(N)/8
 $4.05 @1k
MAX805R  2.5 to 3.0
Active High
Open Drain
Adjustable Reset Input
Power Fail Comparator
Watchdog
CDIP(N)/8
PDIP(N)/8
SOIC(N)/8
 $3.54 @1k
MAX805S  2.5 to 3.0
Active High
Open Drain
Adjustable Reset Input
Power Fail Comparator
Watchdog
CDIP(N)/8
PDIP(N)/8
SOIC(N)/8
 $3.54 @1k
MAX805T  3.0 to 3.5
Active High
Open Drain
Adjustable Reset Input
Power Fail Comparator
Watchdog
CDIP(N)/8
PDIP(N)/8
SOIC(N)/8
 $3.54 @1k
MAX806  2.5 to 3.3
Active Low
Push-Pull
Adjustable Reset Input
Manual Reset
Power Fail Comparator
CDIP(N)/8
PDIP(N)/8
SOIC(N)/8
 $4.54 @1k
See All Battery Backup Circuits (86)
Pricing 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

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

Notes and Comments

Trip thresholds at 3.08V, 2.93V, or 2.63V

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



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