BQ4850YMA-85N

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BQ4850YMA-85N is a Real-Time Clock (RTC) integrated circuit. It has a very wide range of application fields and is used in various types of electronic systems to ensure accurate timekeeping. This article will discuss the application fields of this RTC and its working principle.

Application Fields of BQ4850YMA-85N

The BQ4850YMA-85N is an RTC utilizing design for accurate timekeeping. It has numerous application fields, majorly including but not limited to servers and computers, timer-based systems, point-of-sale terminals, clocks, relay control systems, and medical device applications.

In servers and computers, this RTC is used to maintain the system clock and record the absolute time for each transaction. It also synchronizes the system from time to time so as to prevent drift between the system clock and real-time clock.

In timer-based systems, this RTC is used to maintain accurate timekeeping while powering off the system. This ensures that the system resumes at the right time after the power outage is over.

In point-of-sale terminals, this RTC is used to store and update the time information of each transaction in a log file, which is later used for accounting and other clerical tasks.

In clocks, this RTC is used to ensure accurate timekeeping and also display time and date information.

In relay control systems, this RTC is used to switch on and off the relay at the predetermined intervals, thereby controlling the system accordingly.

Finally, in medical device applications, this RTC is used to control the working of certain medical devices in an automated fashion.

Working Principle of BQ4850YMA-85N

The BQ4850YMA-85N RTC is based on “MEMS resonator” technology, which is more advanced and accurate than the traditional quartz crystal. The embedded oscillator works in a frequency range of 32.768 kHz and converts it into a digital clock signal, which helps in precise timekeeping.

Power to the RTC is supplied using an external battery, and a backup circuit is used to provide power even in case of power interrupt. The external battery also safeguards the timekeeping functionality, even if the main power to the system is lost.

The RTC also has an alarm system, which mainly consists of a timer-counter with an alarm enable bit. When the timer-counter reaches the preset alarm time, it triggers an interrupt which can be used for applications like control the clock output and reset the system.

Apart from all the above-mentioned features, BQ4850YMA-85N also has several peripheral functions such as SPI serial interface, temperature sensing, and 32-bit counter to ensure accurate timekeeping. This RTC consumes very low power, has a high level of accuracy, and supports various voltage supply levels.

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