ADM698 Microprocessor Supervisory Circuit

The ADM698/ADM699 supervisory circuits provide power supply monitoring and watchdog timing for microprocessor systems.

The ADM698 monitors the 5 V VCC power supply and generates a RESET pulse during power up, power down and during low voltage "Brown Out" conditions. The RESET output is guaranteed to be functional (logic low) with VCC as low as 1 V.

The ADM699 features an identical monitoring circuit as in the ADM698 plus an additional watchdog timer input to monitor microprocessor activity. The RESET output is forced low if the watchdog input is not toggled within the 1 second watchdog timeout period.

Both parts are available in 8-pin plastic DIP and 16-lead SOIC packages. The 16-lead SOIC contains additional outputs RESET (without inversion) and Watchdog Output WDO (ADM699 only).

Features and Benefits
  • Superior Upgrade for MAX698/MAX699
  • Guaranteed RESET Assertion with
    VCC = 1 V
  • Low 0.6 mA Supply Current
  • Precision 4.65 V Voltage Monitor
  • Power OK/Reset Time Delay
  • Watchdog Timer
  • Minimum Component Count
  • Performance Specified over Temperature
Power Management
Data Sheets
Documentnote
ADM698/ADM699: Microprocessor Supervisory Circuits Data Sheet (Rev. 0)PDF 256 kB
Order Information
Part NumberPackagePacking QtyTemp RangePrice 100-499Price 1000+RoHS
ADM698AN Production8 ld PDIPOTH 50-40 to 85C1.871.59N
ADM698ANZ Production8 ld PDIPOTH 50-40 to 85C1.621.37Y
ADM698ARZ Last Time Buy16 ld SOIC - WideOTH 47-40 to 85C1.771.52Y
ADM698ARZ-REEL Last Time Buy16 ld SOIC - WideREEL 1000-40 to 85C01.52Y
Reference Materials
ADM698/ADM699: Microprocessor Supervisory Circuits Data Sheet (Rev. 0) adm699
Supervisory Devices Complementary Parts Guide for Altera FPGAs adm690
Supervisory Devices Complementary Parts Guide for Xilinx FPGAs adm690
Voltage Monitoring Products Applications Guide adm6317