The R5106N series is a CMOS-based microprocessor 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 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 higher than 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%*. There is a function to stop supervising clock by the watchdog timer (INH function). There are another 4 products by the difference of packages and the function of voltage detector and watchdog timer. The package of R5106N is SOT-23-6.
The Ricoh R5106N Series is a CMOS-based microprocessor supervisory circuit designed as a high-accuracy, ultra-low supply current voltage detector with a built-in delay circuit and watchdog timer. When the supply voltage drops below the threshold or the watchdog timer fails to detect the system clock, a reset output is generated. The circuit includes an inhibit function to stop clock supervision and offers selectable Nch open-drain or CMOS output types.
| Watchdog Timer Timeout Accuracy | +/-33% |
|---|---|
| Package Type | SOT-23-6 |
| Operating Temperature Range | -40 to 105 °C |
The INH pin allows the user to stop supervising the clock by the watchdog timer.
The timeout period can be set using an external capacitor connected to the Cr pin.
The output type is selectable between Nch open-drain and CMOS.