DS1339BU+T

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The DS1339BU+T is a highly accurate real-time clock (RTC) and temperature sensor chip that integrates both time-keeping and temperature measuring capabilities into a single device. It has been designed for applications such as timekeeping on wearable devices and in the automotive, medical, and industrial sectors.

The DS1339BU+T’s RTC circuit is based on a 32kHz low-power oscillator that is regulated by an internal voltage-controlled oscillator (VCO) to achieve an extremely stable frequency. This VCO’s output is then divided down to create a 1Hz output signal. This accurately generated signal is used to drive the RTC circuit, which counts seconds, minutes, hours, days, months, and years.

The DS1339BU+T also incorporates a temperature-sensing circuit which is a thermometer that is sensitive to ambient temperature variations. The thermometer has a resolution of 0.125°C and an accuracy of ±2°C (±1°C with calibration). It also features an automatic compensation algorithm which compensates for both voltage variations and temperature changes over time. This ensures the accuracy and reliability of the time-keeping performance.

In order to interface the DS1339BU+T with a microprocessor, the chip features an I2C serial digital interface to provide access to the real-time clock and temperature sensor data. This digital interface supports data rates of up to 400 kbps and is capable of sending and receiving data from the microprocessor. The I2C interface can also be used to perform time control and reset operations, allowing the microprocessor to control the real-time clock and temperature sensor directly.

The DS1339BU+T is an ideal choice for designers looking to develop a product with a reliable real-time clock and temperature sensor. Its highly accurate and stable performance make it suitable for a wide range of applications in the automotive, medical, and industrial sectors. Its versatile I2C interface also allows for easy integration into existing systems, making the DS1339BU+T a great choice for designers striving to meet their timekeeping and temperature sensing needs.

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