MAX802L:Microprocessor Supervisory Circuits

Industry-Standard, Full-Function uP Supervisor

The MAX690A/MAX692A/MAX802L/MAX802M/MAX805L reduce the complexity and number of components required for power-supply monitoring and battery-control functions in microprocessor (µP) systems. They significantly improve system reliability and accuracy compared to separate ICs or discrete components. These parts provide four functions: 1) A reset output during power-up, power-down, and brownout conditions. 2) Battery-backup switching for CMOS RAM, CMOS µP, or other low-power logic. 3) A reset pulse if the optional watchdog timer has not been toggled within 1.6sec. 4) A 1.25V threshold detector for power-fail warning or low-battery detection, or to monitor a power supply other than +5V. The parts differ in their reset-voltage threshold levels and reset outputs. The MAX690A/MAX802L/MAX805L generate a reset pulse when the supply voltage drops below 4.65V, and the MAX692A/MAX802M generate a reset below 4.40V. The MAX802L/MAX802M guarantee power-fail accuracies to ±2%. The MAX805L is the same as the MAX690A except that RESET is provided instead of active-low RESET. All parts are available in 8-pin DIP and SO packages. The MAX690A/MAX802L are pin compatible with the MAX690 and MAX694. The MAX692A/MAX802M are pin compatible with the MAX692.

Key Features
  • Precision Supply Voltage Monitor:
    • 4.65V for MAX690A/MAX802L/MAX805L
    • 4.40V for MAX692A/MAX802M
  • Reset Time Delay: 200ms
  • Watchdog Timer: 1.6s Timeout
  • Battery-Backup Power Switching
  • 200µA Quiescent Supply Current
  • 50nA Quiescent Supply Current in Battery-Backup Mode
  • Voltage Monitor for Power-Fail or Low-Battery Warning
  • Power-Fail Accuracy Guaranteed to ±2% (MAX802L/M)
  • Guaranteed Active-Low RESET Assertion to VCC = 1V
  • 8-Pin SO and DIP Packages
MAX690A, MAX692A, MAX802L, MAX802M, MAX805L: Typical Operating Circuit
MAX690A, MAX692A, MAX802L, MAX802M, MAX805L: Typical Operating Circuit
Applications/Uses
  • Battery-Powered Computers/Controllers
  • Critical µP Monitoring
  • Intelligent Instruments
DataSheet
titleDownload file
MAX690A-MAX805L Data SheetMAX690A-MAX805L.pdf
Parametrics
Part NumberReset Thresh.
(V)
Reset OutICC
(µA)
Oper. Temp.
(°C)
Package/PinsBudgetary
Price
maxSee Notes
MAX690A4.5 to 5.0Active Low
Push-Pull
350-55 to +125
-40 to +85
0 to +70
CDIP(N)/8
PDIP(N)/8
SOIC(N)/8
$3.88 @1k
MAX692A4.0 to 4.5Active Low
Push-Pull
-55 to +125
-40 to +85
0 to +70
CDIP(N)/8
PDIP(N)/8
SOIC(N)/8
$4.37 @1k
MAX802L4.5 to 5.0Active Low
Push-Pull
-40 to +85
0 to +70
PDIP(N)/8
SOIC(N)/8
$4.04 @1k
MAX802M4.0 to 4.5Active Low
Push-Pull
-40 to +85
0 to +70
PDIP(N)/8
SOIC(N)/8
$6.22 @1k
MAX805L4.5 to 5.0Active High
Push-Pull
-55 to +125
-40 to +85
0 to +70
CDIP(N)/8
PDIP(N)/8
SOIC(N)/8
$3.55 @1k
Ordering Information
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX802LCPANo Longer AvailableMAX802LCPA+PDIP(N),;8 pin;79.7 mm²0°C to +70°CNo
MAX802LCPA+ActivePDIP(N),;8 pin;79.7 mm²0°C to +70°CLead Free
MAX802LCSANo Longer AvailableMAX802LCSA+SOIC(N),;8 pin;30.9 mm²0°C to +70°CNo
MAX802LCSA+ActiveSOIC(N),;8 pin;30.9 mm²0°C to +70°CLead Free
MAX802LCSA+TActiveSOIC(N),;8 pin;30.9 mm²0°C to +70°CLead Free
MAX802LCSA-TNo Longer AvailableMAX802LCSA+TN.SO;8 pin0°C to +70°CSee data sheet
MAX802LEPANo Longer AvailableMAX802LEPA+PDIP(N),;8 pin;79.7 mm²-40°C to +85°CNo
MAX802LEPA+ActivePDIP(N),;8 pin;79.7 mm²-40°C to +85°CLead Free
MAX802LESANo Longer AvailableMAX802LESA+SOIC(N),;8 pin;30.9 mm²-40°C to +85°CNo
MAX802LESA+ActiveSOIC(N),;8 pin;30.9 mm²-40°C to +85°CLead Free
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX802LESA+TActiveSOIC(N),;8 pin;30.9 mm²-40°C to +85°CLead Free
MAX802LESA-TNo Longer AvailableMAX802LESA+TN.SO;8 pin-40°C to +85°CSee data sheet
MAX690A-MAX805L.pdf MAX805L