MAX805R, MAX805S, MAX805T:3.0V/3.3V Microprocessor Supervisory Circuits

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

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: Part Active-Low Reset Active-High Reset Watchdog Input Manual Reset Input Backup-Battery Switch Power-Fail Threshold Accuracy Power-Fail Comparator Reset Window MAX690 √   √   √ ±4% √ ±75mV MAX704 √     √ √ ±4% √ ±75mV MAX802 √   √   √ ±2% √ ±2% MAX804   √ √   √ ±2% √ ±2% MAX805   √ √   √ ±4% √ ±75mV MAX806 √     √ √ ±2% √ ±2%

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
MAX690T: Typical Operating Circuit
 MAX690T: Typical Operating Circuit
Applications/Uses
  • Battery-Powered Computers/Controllers
  • Critical µP Monitoring
  • Embedded Controllers
  • Intelligent Instruments
  • Portable Equipment
DataSheet
titleDownload file
MAX690R-MAX806T Data SheetMAX690R-MAX806T.pdf
Parametrics
Part NumberReset Thresh.
(V)
Reset OutICC
(µA)
Oper. Temp.
(°C)
Package/PinsBudgetary
Price
maxSee Notes
MAX690R2.5 to 3.0Active Low
Push-Pull
50-55 to +125
-40 to +85
0 to +70
CDIP(N)/8
PDIP(N)/8
SOIC(N)/8
$3.88 @1k
MAX690S2.5 to 3.0Active Low
Push-Pull
CDIP(N)/8
PDIP(N)/8
SOIC(N)/8
$3.01 @1k
MAX690T3.0 to 3.5Active Low
Push-Pull
CDIP(N)/8
PDIP(N)/8
SOIC(N)/8
$3.88 @1k
MAX704R2.5 to 3.0Active Low
Push-Pull
CDIP(N)/8
PDIP(N)/8
SOIC(N)/8
$5.23 @1k
MAX704S2.5 to 3.0Active Low
Push-Pull
CDIP(N)/8
PDIP(N)/8
SOIC(N)/8
$4.88 @1k
MAX704T3.0 to 3.5Active Low
Push-Pull
CDIP(N)/8
PDIP(N)/8
SOIC(N)/8
$3.47 @1k
MAX802R2.5 to 3.0Active Low
Push-Pull
CDIP(N)/8
PDIP(N)/8
SOIC(N)/8
$7.21 @1k
MAX802S2.5 to 3.0Active Low
Push-Pull
CDIP(N)/8
PDIP(N)/8
SOIC(N)/8
$5.95 @1k
MAX802T3.0 to 3.5Active Low
Push-Pull
CDIP(N)/8
PDIP(N)/8
SOIC(N)/8
$4.88 @1k
MAX8042.5 to 3.3Active High
Active Low
Open Drain
CDIP(N)/8
PDIP(N)/8
SOIC(N)/8
$7.21 @1k
MAX805R2.5 to 3.0Active High
Open Drain
CDIP(N)/8
PDIP(N)/8
SOIC(N)/8
$7.21 @1k
MAX805S2.5 to 3.0Active High
Open Drain
CDIP(N)/8
PDIP(N)/8
SOIC(N)/8
$4.55 @1k
MAX805T3.0 to 3.5Active High
Open Drain
CDIP(N)/8
PDIP(N)/8
SOIC(N)/8
$4.55 @1k
MAX8062.5 to 3.3Active Low
Push-Pull
CDIP(N)/8
PDIP(N)/8
SOIC(N)/8
$5.45 @1k
Ordering Information
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX805RC/DActiveDICE SALES,;NA pin;DICE;See data sheet
MAX805RCPANo Longer AvailableMAX805RCPA+PDIP(N),;8 pin;79.7 mm²0°C to +70°CNo
MAX805RCPA+ActivePDIP(N),;8 pin;79.7 mm²0°C to +70°CLead Free
MAX805RCSANo Longer AvailableMAX805RCSA+SOIC(N),;8 pin;30.9 mm²0°C to +70°CNo
MAX805RCSA+ActiveSOIC(N),;8 pin;30.9 mm²0°C to +70°CLead Free
MAX805RCSA+TActiveN.SO;8 pin0°C to +70°CSee data sheet
MAX805RCSA-TNo Longer AvailableN.SO;8 pin0°C to +70°CSee data sheet
MAX805REPANo Longer AvailableMAX805REPA+PDIP(N),;8 pin;79.7 mm²-40°C to +85°CNo
MAX805REPA+ActivePDIP(N),;8 pin;79.7 mm²-40°C to +85°CLead Free
MAX805RESANo Longer AvailableMAX805RESA+SOIC(N),;8 pin;30.9 mm²-40°C to +85°CNo
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX805RESA+ActiveSOIC(N),;8 pin;30.9 mm²-40°C to +85°CLead Free
MAX805RESA+TActiveSOIC(N),;8 pin;30.9 mm²-40°C to +85°CLead Free
MAX805RESA-TNo Longer AvailableMAX805RESA+TN.SO;8 pin-40°C to +85°CSee data sheet
MAX805RMJANo Longer AvailableCDIP(N),;8 pin;82.6 mm²-55°C to +125°CNo
MAX690R-MAX806T.pdf MAX806T
MAX690R-MAX806T.pdf MAX805T