S-80828CNY-B2-U

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PMIC-Supervisors are designed to satisfy power management needs such as detecting wake-up logic and preventing faults in digital applications, and the S-80828CNY-B2-U IC In particular is a highly integrated three-terminal supervisor IC with fixed voltage threshold and an active-low manual reset input. A 32 kHz crystal oscillator generates an accurate reference signal for an internal frequency divider and generates a watchdog timer with a time-out ranging from 1.6 seconds to 140 seconds, allowing flexibility design.

Application Field

The S-80828CNY-B2-U is capable of automotive applications and general purpose because of its wide operating voltage range (1.6 V ~ 5.5 V) and temperature range (-40 °C ~ +85 °C), Additionally, it is ideal for fail-safe in a high-reliability system, such as a server, disk drive, wide area network, and life-support system. Also, it is available to connect a digital bus such as I²C or SPI for communication.

Working PrincipleAnd Features

The S-80828CNY-B2-U is mainly composed of a Voltage Detector, Blanking circuit , Reset Timer and Edge Detector with manual reset and control logic. When the VDD (system voltage) is lower than the VRTO voltage, the voltage detector converts to Low state, and the reset signal (RESET#) brings high for the active-low manual reset input. With the Edge Detector and the control logic, it can perform a rapid reset. When the system voltage is higher than the Vrto voltage, the supervisor stops resetting until the manual reset is triggered. With the alternating signal output, RESET# and RESET, it is maintained in a signal low logic level and will automatically reset the system in the case of a malfunction.

The watchdog timer of the S-80828CNY-B2-U can be used in the control program of the microcontroller to monitor the system. When the execution of the program is too slow or not normal, the watchdog will be released. The manual reset can be triggered by a push button or Li-Ion battery, and the reset signal is enable when the system is rebooted or coming out of a low power state. Besides, the S-80828CNY-B2-U also provides an output signal with a low voltage detector, which can be used for monitoring and protecting the operating voltage for the system.

Conclusion

The S-80828CNY-B2-U excels in various applications thanks to its highly integrated functions and additional features. The S-80828CNY-B2-U can serve as an important safety component in automotive and general purpose applications to ensure reliable performance, to protect the system and to ensure fail-safety condition. By providing accurate reference voltage and clock signals, monitoring and reset capability, and features such as batteries check, the S-80828CNY-B2-U can bring substantial improvement to the system.

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