Nisshinbo Micro Devices Inc. R5109G301A-TR-FE

The R5109G is a microprocessor supervisory circuit and has high accuracy and ultra low supply current voltage detector with built - in delay circuit and watchdog timer. When the supply voltage is down across the threshold, or the watchdog timer does not detect the system clock from the microprocessor, the reset output is generated. The voltage detector circuit is used for the system reset, etc. The detector threshold is fixed internally, and the accuracy is ±1.0%. The released delay time (Power - on Reset Delay) circuit is built - in, and output delay time is adjustable with an external capacitor, and the accuracy is ±16%. When the supply voltage becomes the released voltage, the reset state will be maintained during the delay time. The output type of the reset is selectable, Nch open - drain, or CMOS. The time out period of the watchdog timer can be also set with an external capacitor, and the accuracy is ±33%. The function to stop supervising clock by the watchdog timer (INH function) and the function to supervise two different clocks are built in this IC. There are another 4 products by the difference of packages and the function of voltage detector and watchdog timer. The package of R5109G is SSOP - 8G.

• Operating Voltage Range (Maximum Rating): 0.9V to 6.0V (7.0V)
• Supply Current: Typ. 11.5µA
• Detector Threshold Range: 1.5V to 5.5V (0.1V steps)
• Detector Threshold Accuracy: ±1.0%
• Power - on Reset Delay Time accuracy: ±16% (-40°C ≤ Ta ≤ 105°C)
• Power - on reset delay time of the voltage detector: Typ. 370ms with an external capacitor: 0.1µF
• Built - in a watchdog timer's time out period accuracy: ±33% (-40°C ≤ Ta ≤ 105°C)
• Timeout period for watchdog timer: Typ. 310ms with an external capacitor: 0.1µF
• Reset timer for watchdog timer: Typ. 34ms with an external capacitor: 0.1µF
• With Inhibit pin (INH): Able to stop watchdog timer
• Dual clock input: Able to supervise two microprocessors
• Package: SSOP - 8G

• Supervisory circuit for equipment with using microprocessors.