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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 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 ...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%.

    RESOURCES & TOOLS

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    • 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)
    • 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

    Functional Block Diagram for ADM692A

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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.