The R5105N Series are CMOS-based con supervisory circuit, or 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 con, the reset output is generated. The voltage detector circuit is used for the system reset, etc. The detector threshold is fixed internally, and the tolerance 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. When the supply voltage becomes the released voltage, the reset state will be maintained during the delay time. The time out period of the watchdog timer can be also set with an external capacitor. The output type of the reset is selectable, Nch open-drain, or CMOS. The package is small SOT-23-6.