R8359 Series
Watchdog Timer Equipped with 2-Clock Monitoring with VD

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  • Description

    The R8359 Series are CMOS-based system power ICs with a voltage detector (VD) and watchdog timer (WDT) integrated in a single chip.

    R8359 monitors the power system of devices equipped with microprocessors and prevents system runaway with a reset signal when a malfunction occurs. The output delay time of the VD and watchdog timeout period/reset time can be adjusted by an external capacitor with a high degree of accuracy. R8359 is equipped with the function that inhibits clock monitoring of the WDT (INH) and the function to supervise two different clocks.

  • Spec
    Input Voltage Range 0.9 V to 6.0 V (7.0 V)
    Operating Temperature Range -40°C to 125°C (150°C)
    Supply Current Typ. 11.5 µA
    Timeout Period Typ. 310 ms (CTW = 0.1 µF)
    Timeout Period Accuracy ±33% (-40°C ≤ Ta ≤ 110°C)
    Reset Time Typ. 34 ms (CTW = 0.1 µF)
    Package SSOP-8G
    VD Detector Threshold Range 1.5 V to 5.5 V (0.1 V step)
    VD Detector Threshold Accuracy ±1.0%
    VD Detector Threshold Temperature Coefficient Typ. ±100 ppm/°C (-40°C ≤ Ta ≤ 110°C)
    VD Release Output Delay Time Typ. 350 ms (CD = 0.1 µF)
    VD Release Delay Time Accuracy ±16% (-40°C ≤ Ta ≤ 110°C)
  • Technical
    • Typical Appliation

      Typical Application

  • Quality &
    • Refer to the datasheets for the details on the product.
    • The package file or the datasheet includes package dimensions, taping specifications, taping reels dimensions, power dissipations, and recommended land pattern.

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Functional Description

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Category:Watchdog Timers

Features +VD,2 Clock Input
min (V)
max (V)