ADM692A:  µP Supervisor with Backup Battery Switchover, Watchdog Feature, Power Fail Warning, 4.4V Threshold Voltage, Active Low Reset and 250mA Output Current

The ADM690A/ADM692A/ADM802L/M/ADM805L/M family of supervisory circuits offers complete single chip solutions for power supply monitoring and battery control functions in microprocessor systems. These ...More

ADM692A:  µP Supervisor with Backup Battery Switchover, Watchdog Feature, Power Fail Warning, 4.4V Threshold Voltage, Active Low Reset and 250mA Output Current

Product Description

The ADM690A/ADM692A/ADM802L/M/ADM805L/M family of supervisory circuits offers complete single chip solutions for power supply monitoring and battery control functions in microprocessor systems. These functions include mP reset, backup battery switchover, watchdog timer, and power failure warning.

The ADM690A/ADM692A/ADM802L/M/ADM805L/M are available in 8-pin packages and provide:

  • Power-on reset output during power-up, power-down and brownout conditions. The RESET output remains opera-tional with VCC as low as 1 V.
  • Battery backup switching for CMOS RAM, CMOS microprocessor or other low power devices.
  • A reset pulse if the optional watchdog timer 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.

    • On the ADM690A/ADM802L/ADM805L the reset voltage threshold is 4.65 V. On the ADM692A/ADM802M/ ADM805M, the reset voltage threshold is 4.40 V.

    The ADM802L/ADM802M guarantee power fail accuracies to ±2%.

    Features

    • Precision Supply Voltage Monitor
    • 4.65 V ADM690A/ADM802L/ADM805L
    • 4.40 V ADM692A/ADM802M/ADM805M
    • Reset Assertion Down to 1 V VCC
    • Reset Timeout—200 ms
    • Watchdog Timer—1.6 s
    • 100 mA Quiescent Supply Current
    • Automatic Battery Backup Power Switching
    • Voltage Monitor for Power Fail
    • ±2% Power Fail Accuracy on ADM802L/M
    • Space-Saving MicroSOIC Package (ADM690A)

    Diagrams

    • Enlarge
    • Symbols and Footprints
    ADM692A Diagram
    Functional Block Diagram for ADM692A

    Specifications

    Backup-Battery Switch Yes
    Batt-Backup-Flg Yes
    Chip Enable Gating ---
    Package DIP,SOIC
    Reset Threshold (V) 4.4
    Reset Output-Stage Active-Low/Push-Pull
    Min Reset Timeout (ms) 140
    Typ Watchdog Timeout (ms) 1600

    Explore Other Products

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    ADM692 4.4V 35 Active-Low/Push-Pull Yes --- 100, 1,600, adj. DIP µP Supervisor with Backup Battery Switchover, Watchdog, Power Fail Warning, Reset Generator $2.42
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    ADM693 4.4V 35 (Adjustable) Active-High/Push-Pull, Active-Low/Push-Pull Yes Yes 100, 1,600, adj. DIP, SOIC µP Supervisor with Backup Battery Switchover, Watchdog, Pwr Fail Warning, 4.4V Threshold, 100mA $2.73
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    ADM8692 4.4V 35 Active-Low/Push-Pull Yes --- 100, 1,600 DIP, SOIC µP Supv w/ Backup Battery Switch, Watchdog, Power Fail Flag, 4.4V Vth, Active Low Reset, 100mA Iout $2.72
    ADM8693 4.4V 35 (Adjustable) Active-High/Push-Pull, Active-Low/Push-Pull Yes Yes 100, 1,600, adj. DIP, SOIC, SOP µP Supervisor w/ Backup Battery Switching, Watchdog, Pwr Fail Flag, 4.4V Vth, 100mA Iout $2.72
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