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ADM707:  Low Cost Microprocessor Supervisory Circuit

The ADM705/ADM706/ADM707/ADM708 are low cost microprocessor supervisory circuits. They are suitable for monitoring the 5 V power supply/battery and can also monitor microprocessor activity.

The ADM705/ADM706 provide the following functions:

  • Power-on reset output during power-up, power-down, and brownout conditions. The RESET output ...More

    • ADM707:  Low Cost Microprocessor Supervisory Circuit

    Product Description

    The ADM705/ADM706/ADM707/ADM708 are low cost microprocessor supervisory circuits. They are suitable for monitoring the 5 V power supply/battery and can also monitor microprocessor activity.

    The ADM705/ADM706 provide the following functions:

  • Power-on reset output during power-up, power-down, and brownout conditions. The RESET output remains operational with VCC as low as 1 V.
  • Independent watchdog timeout, WDO, that goes low if the watchdog input has not been toggled within 1.6 seconds.
  • A 1.25 V threshold detector for power-fail warning, low battery detection, or to monitor a power supply other than 5 V.
  • An active low debounced manual reset input (MR).

    The ADM707/ADM708 differ in that

  • A watchdog timer function is not available.
  • An active high reset output is available in addition to the active low output.

    Two supply voltage monitor levels are available. The ADM705/ADM707 generate a reset when the supply voltage falls below 4.65 V, while the ADM706/ADM708 require that the supply fall below 4.40 V before a reset is issued.

    All parts are available in 8-lead PDIP (N-8) and SOIC (R-8) packages, with the ADM708 also available in an MSOP (RM-8) package.

    Applications

  • Microprocessor systems
  • Computers
  • Controllers
  • Intelligent instruments
  • Automotive systems
  • Critical microprocessor supply monitoring

    • Data Sheet, Rev. F, 2/07

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    • Guaranteed RESET valid with VCC = 1 V
    • 190 μA quiescent current
    • Precision supply voltage monitor
      4.65 V (ADM705/ADM707)
      4.40 V (ADM706/ADM708)
    • 200 ms reset pulse width
    • Debounced TTL/CMOS manual reset input (MR)
    • Independent watchdog timer (ADM705/ADM706)
    • 1.6 sec timeout (ADM705/ADM706)
    • Active high reset output (ADM707/ADM708)
    • Voltage monitor for power-fail or low battery warning
    • Superior upgrade for MAX705 to MAX708
    • Watchdog Timer: No
    • # of Monitored Voltages: 1
    • Backup-Battery Switch: No
    • Manual Reset Capability: Yes
    • Package: DIP,SOIC
    • Reset Threshold Summary: 4.65V
    • Reset Output-Stage: Active-High/Push-Pull,Active-Low/Push-Pull
    • Min Reset Timeout (ms): 160

    Functional Block Diagram for ADM707

    Similar Products

    arrow View Full Interactive Product Selection Table
    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 $0.71
    ADM803 6 Options--2.32 to 4.63V 140 Active-Low/Open-Drain No SC70 $0.26
    ADM809 7 Options--2.32 to 4.63V 140 Active-Low/Push-Pull No SC70, SOT $0.62
    ADM810 7 Options--2.32 to 4.63V 140 Active-High/Push-Pull No SC70, SOT $0.61
    ADM811 6 Options--2.32 to 4.63V 140 Active-Low/Push-Pull Yes SOT $0.46
    ADM812 6 Options--2.32 to 4.63V 140 Active-High/Push-Pull Yes SOT $0.46
    ADM825 7 Options--2.19 to 4.63V 140 Active-High/Push-Pull, Active-Low/Push-Pull Yes SC70, SOT $0.51
    ADM8698 4.65V 140 Active-High/Push-Pull, Active-Low/Push-Pull No DIP, SOIC $2.01
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    *The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.
    **Sample availability may be better than production availability. Please enter samples into your cart to check sample availability.