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 ...More

ADM698:  Microprocessor Supervisory Circuit

Product Description

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

  • 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

Diagrams

ADM698 Diagram
Functional Block Diagram for ADM698

Характеристики

# of Monitored Voltages 1
Backup-Battery Switch No
Manual Reset Capability No
Package DIP,SOIC
Reset Threshold Summary 4.65V
Reset Output-Stage Active-High/Push-Pull,Active-Low/Push-Pull
Min Reset Timeout (ms) 140
Watchdog Timer No

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Получать уведомление о новинках
Part# Reset Threshold Summary Min Reset Timeout (ms) Reset Output-Stage Manual Reset Capability Package Price* (1000-4999)
ADM1810 4.35V & 4.62V 100 Active-Low/Push-Pull No SC70, SOT $0.46
ADM1811 4.35V & 4.62V 100 Active-Low/Int-Pullup No SC70, SOT $0.46
ADM1812 4.35V & 4.62V 100 Active-High/Push-Pull No SC70, SOT $0.46
ADM1813 4.35V & 4.62V 100 Active-Low/Int-Pullup Yes SC70, SOT $0.39
ADM1815 5 Options--2.18 to 3.06V 100 Active-High/Push-Pull No SC70, SOT $0.39
ADM1816 5 Options--2.18 to 3.06V 100 Active-Low/Int-Pullup No SC70, SOT $0.46
ADM1817 5 Options--2.18 to 3.06V 100 Active-High/Push-Pull No SC70, SOT $0.46
ADM1818 5 Options--2.18 to 3.06V 100 Active-Low/Int-Pullup Yes SC70, SOT $0.45
ADM6315 6 Options--2.63 to 4.63V 1, 1,120, 140, 20 Active-Low/Open-Drain Yes SOT $0.81
ADM6319 26 Options--2.5 to 5V 1, 1,120, 140, 20 Active-High/Push-Pull, Active-Low/Push-Pull Yes SOT $0.50
ADM6322 26 Options--2.5 to 5V 1, 1,200, 140, 20 Active-High/Push-Pull, Active-Low/Open-Drain Yes SOT $0.51
ADM6384 31 Options--1.58 to 5.0V 1, 1,120, 140, 20 Active-Low/Push-Pull Yes SC70 $0.95
ADM6711 6 Options--2.32 to 4.63V 140 Active-Low/Push-Pull Yes SC70 $0.26
ADM6713 6 Options--2.32 to 4.63V 140 Active-Low/Open-Drain Yes SC70 $0.28
ADM6825 9 Options--1.58 to 4.63V 140 Active-High/Push-Pull, Active-Low/Push-Pull Yes SOT -
ADM698 4.65V 140 Active-High/Push-Pull, Active-Low/Push-Pull No DIP, SOIC $1.37
ADM707 4.65V 160 Active-High/Push-Pull, Active-Low/Push-Pull Yes DIP, SOIC $0.97
ADM708 4 Options--2.63 to 4.4V 160 Active-High/Push-Pull, Active-Low/Push-Pull Yes DIP, SOIC, SOP $0.85
ADM709 5 Options--2.63 to 4.65V 140 Active-Low/Push-Pull No DIP, SOIC