ADM800:  µP Supervisor , Adjustable Reset and Watchdog Periods

The ADM691A/ADM693A/ADM800L/ADM800M family of supervisory circuits offers complete single chip solutions for power supply monitoring and battery control functions in microprocessor systems. These ...More

ADM800:  µP Supervisor , Adjustable Reset and Watchdog Periods

Product Description

The ADM691A/ADM693A/ADM800L/ADM800M 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, CMOS RAM write protection, and power-failure warning. The family of products provides an upgrade for the MAX691A/93A/800M family of products.

All parts are available in 16-pin DIP and SO packages. The ADM691A is also available in a space-saving TSSOP package. The following functionality is provided:

  • Power-on reset output during power-up, power-down and brownout conditions. The circuitry remains operational with VCC as low as 1 V.
  • Battery backup switching for CMOS RAM, CMOS micro-processor or other low power logic.
  • A reset pulse if the optional watchdog timer has not been toggled within a specified time.
  • A 1.25 V threshold detector for power fail warning, low battery detection, or to monitor a power supply other than +5 V.

    • Features

    • Low Power Consumption
    • Precision Voltage Monitor
    • ±2% Tolerance on ADM800L/M
    • Reset Time Delay—200 ms, or Adjustable
    • 1 µA Standby Current
    • Automatic Battery Backup Power Switching
    • Fast Onboard Gating of Chip Enable Signals
    • Also Available in TSSOP Package (ADM691A)

    Diagrams

    ADM800 Diagram
    Functional Block Diagram for ADM800

    Specifications

    Typ Watchdog Timeout (ms) 100,1600,adj.
    Batt-Backup-Flg Yes
    Chip Enable Gating Yes
    Package DIP,SOIC
    Reset Threshold Summary 4.4V & 4.65V
    Reset Output-Stage Active-High/Open-Drain,Active-Low/Push-Pull
    Min Reset Timeout (ms) 140 (Adjustable)
    Backup-Battery Switch Yes

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    Part# Reset Threshold Summary Min Reset Timeout (ms) Reset Output-Stage Backup-Battery Switch Chip Enable Gating Typ Watchdog Timeout (ms) Package Product Description Price* (1000-4999)
    ADM8696 1.3V 35 (Adjustable) Active-High/Push-Pull, Active-Low/Push-Pull Yes --- 100, 1,600, adj. DIP, SOIC, SOP µP Supv w/ Backup Batt Switch, Adj Low Line V Monitor, Adj Watchdog Timer, Pwr Fail& Watchdog Status $2.72
    ADM8697 1.3V 35 (Adjustable) Active-High/Push-Pull, Active-Low/Push-Pull No Yes 100, 1,600, adj. DIP, SOIC, SOP µP Supv w/ CE Inputs, Adj Low Line V Monitor, Adj Watchdog Timer; Low Line, Pwr Fail&Watchdog Status $2.72
    ADM696 1.3V (Adjustable) 35 Active-High/Push-Pull, Active-Low/Push-Pull Yes --- 100, 1,600, adj. DIP, SOIC µP Supv w/ Backup Battery Switchover, Adj Low Line V Monitor, Adj Watchdog Timer, 100 mA Iout $2.63
    ADM697 1.3V (Adjustable) 35 Active-High/Push-Pull, Active-Low/Push-Pull No Yes 100, 1,600, adj. DIP, SOIC µP Supv with CE Inputs, Adj Low Line V Monitor, Adj W-dog Timer, Low Line, Pwr Fail & W-dog Status $2.63
    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
    ADM692A 4.4V 140 Active-Low/Push-Pull Yes --- 1,600 DIP, SOIC µP Supervisor w/ Battery Steering, Watchdog, Pwr Fail Warning, Active Low Reset, 250mA Iout $1.68
    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
    ADM693A 4.4V 140 (Adjustable) Active-High/Open-Drain, Active-Low/Push-Pull Yes Yes 100, 1,600, adj. DIP, SOIC µP Supervisor w/ Backup Battery Switchover, Watchdog, Pwr Fail Warning, 4.4V Threshold, 250mA Iout $1.85
    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
    ADM800 4.4V & 4.65V 140 (Adjustable) Active-High/Open-Drain, Active-Low/Push-Pull Yes Yes 100, 1,600, adj. DIP, SOIC µP Supv w/ Backup Battery Switchover, Adj Reset &Watchdog Periods, CE Inputs, 4.4V/4.65V Threshold $2.33
    ADM802 4.4V & 4.65V 140 Active-Low/Push-Pull Yes --- 1,600 DIP, SOIC µP Supv w/ Backup Battery Switchover, Power Fail Flag, 4.4V/4.65V Threshold, 250mA Output Current $2.23
    ADM805 4.4V & 4.65V 140 Active-High/Push-Pull Yes --- 1,600 DIP, SOIC µP Supv w/ Backup Battery Switchover, Watchdog, Power Fail Flag, 4.4V/4.65V Threshold, 250mA Iout $2.23
    ADM690 4.65V 35 Active-Low/Push-Pull Yes --- 100, 1,600 DIP Supervisory Circuit w/ 4.65V Reset, Battery Switchover, Watchdog Timer, Power Fail Input $2.42
    ADM690A 4.65V 140 Active-Low/Push-Pull Yes --- 1,600 DIP, SOIC, SOP µP Supervisor with Backup-Battery Switchover, Watchdog Feature, Power-Fail Warning, 4.65V Threshold $1.52
    ADM691 4.65V 35 (Adjustable) Active-High/Push-Pull, Active-Low/Push-Pull