ADM805:  µP Supervisor with Backup Battery Switchover, Watchdog Feature, Power Fail Warning, 4.4V/4.65V Threshold Voltage, Active High 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

ADM805:  µP Supervisor with Backup Battery Switchover, Watchdog Feature, Power Fail Warning, 4.4V/4.65V Threshold Voltage, Active High 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 operational 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
    • 原理图符号和PCB封装
    ADM805 Diagram
    Functional Block Diagram for ADM805

    技术指标

    Backup-Battery Switch Yes
    Batt-Backup-Flg Yes
    Chip Enable Gating ---
    Package DIP,SOIC
    Reset Threshold (V) 4.4,4.65
    Reset Output-Stage Active-High/Push-Pull
    Min Reset Timeout (ms) 140
    Typ Watchdog Timeout (ms) 1600

    浏览其他的产品

    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