MAX704S: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
Quality and Environmental Data
Ordering Information
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX704SC/DActiveDICE SALES,;NA pin;DICE;See data sheet
MAX704SCPANo Longer AvailableMAX704SCPA+PDIP(N),;8 pin;79.7 mm²0°C to +70°CNo
MAX704SCPA+ActivePDIP(N),;8 pin;79.7 mm²0°C to +70°CLead Free
MAX704SCSANo Longer AvailableMAX704SCSA+SOIC(N),;8 pin;30.9 mm²0°C to +70°CNo
MAX704SCSA+ActiveSOIC(N),;8 pin;30.9 mm²0°C to +70°CLead Free
MAX704SCSA+TActiveSOIC(N),;8 pin;30.9 mm²0°C to +70°CLead Free
MAX704SCSA-TNo Longer AvailableMAX704SCSA+TN.SO;8 pin0°C to +70°CSee data sheet
MAX704SEPANo Longer AvailableMAX704SEPA+PDIP(N),;8 pin;79.7 mm²-40°C to +85°CNo
MAX704SEPA+ActivePDIP(N),;8 pin;79.7 mm²-40°C to +85°CLead Free
MAX704SESANo Longer AvailableMAX704SESA+SOIC(N),;8 pin;30.9 mm²-40°C to +85°CNo
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX704SESA+ActiveSOIC(N),;8 pin;30.9 mm²-40°C to +85°CLead Free
MAX704SESA+TActiveSOIC(N),;8 pin;30.9 mm²-40°C to +85°CLead Free
MAX704SESA-TNo Longer AvailableMAX704SESA+TSOIC(N),;8 pin;30.9 mm²-40°C to +85°CNo
MAX704SMJAActiveCDIP(N),;8 pin;82.6 mm²-55°C to +125°CNo
MAX690R-MAX806T.pdf MAX806T
MAX704S.pdf MAX704S
MAX690R-MAX806T.pdf MAX805T