PCF8523T/1,118

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The PCF8523T/1,118 is a 32.768khZ timed real-time clock/calendar optimized for extremely low power consumption. It offers an advanced time and alarm structure, capable of storing all necessary timekeeping parameters in a low-power SRAM on the chip that is powered by an external capacitor, from which the device drops data on demand. It operates off a 3V lithium battery, even when the primary power is lost.

The PCF8523T/1,118 integrates an advanced time and alarm structure that can store all necessary timekeeping parameters in a low-power SRAM on the chip that is powered by an external capacitor. The device calculates the date and time once every second, with no external components being required and it can operate in either 24-hour or 12-hour format, depending on user selection. Additionally, it offers an absolute time-of-day alarm, allowing system wake-up to occur at a selected exact time, and an interval alarm, allowing the device to wake up at any interval up to 24 hours.

The PCF8523T/1,118 has digital control logic to enable the user to control timekeeping functions from directly from the system\'s microcontroller or central processor. The device provides a serial interface for transferring data and which is compatible with most commonly used data buses.

The PCF8523T/1,118 also offers a number of features that enable it to be used in a multitude of different applications. For instance, it has a built-in oscillator which provides it a clock accuracy of ±5 ppm maximum, or ±70 ppb over the temperature range of -40 to +85°C. Further, it is compliant with the ISO 8601 standard timekeeping format and conforms to the I2C slave protocol before v2.0. It also has an auto-sleeping function where it puts itself into a low-power mode when idle, allowing it to operate with a current consumption as low as 0.33uA.

The most common application for a PCF8523T/1,118 is for timekeeping and alarm management applications. It can be used to provide accurate timekeeping in any application that requires a timekeeping function, from controlling process systems to providing time and alarm data for medical devices. Additionally, the device can be used in other applications such as power monitoring and control since it can be used to provide an accurate timestamp for logging power consumption data.

In terms of its working principle, the PCF8523T/1,118 uses a crystal oscillator that runs at 32.768khz, providing an accurate clock signal. Its integrated real-time clock (RTC) then uses this signal to precisely keep time. The device also has dedicated registers for calculating date and time, as well as a RAM memory for storing timekeeping parameters in a low-power format. The device can also be programmed by an I2C serial interface, allowing data to be taken from and stored on the device.

Overall, the PCF8523T/1,118 is a highly-accurate, low-power real-time clock/calendar suitable for a variety of timekeeping and alarm management applications. It is easy to program, supports easy data transfer, and comes with an array of features to help meet any specific application needs. It is a versatile timekeeping device that is sure to meet the requirements of any modern system.

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