PCF8523T/1,118
Real-time clock and calendar ICs in compact 8-pin SOIC format
Manufacturer： nxp
series introduction
# Introduction to the PCF8523T/1,118 Product Series
## 1. Overview
The PCF8523T/1,118 is a highly advanced and reliable real - time clock (RTC) product series offered by NXP Semiconductors. Real - time clocks are essential components in a wide range of electronic devices as they provide accurate timekeeping functionality, which is crucial for various applications such as data logging, event scheduling, and system synchronization.
## 2. Key Features
### 2.1 High Accuracy
- The PCF8523T/1,118 features an extremely low power consumption 32.768 kHz crystal oscillator. This oscillator provides high - precision timekeeping with an accuracy that can be maintained over a wide temperature range. The internal temperature compensation mechanism helps to minimize the effects of temperature variations on the clock's accuracy, ensuring that the time remains accurate even in challenging environmental conditions.
- It has a typical accuracy of ±5 ppm at 25°C, which means that the clock will deviate by only 5 parts per million from the ideal time. This high level of accuracy makes it suitable for applications where precise timekeeping is required, such as in industrial control systems and scientific instruments.
### 2.2 Low Power Consumption
- One of the most significant advantages of the PCF8523T/1,118 is its ultra - low power consumption. In standby mode, the current consumption is as low as a few microamperes. This makes it an ideal choice for battery - powered devices, such as wearable devices, wireless sensors, and portable medical equipment.
- The low power design helps to extend the battery life of the device, reducing the frequency of battery replacements and improving the overall user experience.
### 2.3 Multiple Timekeeping Modes
- The product series supports multiple timekeeping modes, including 24 - hour and 12 - hour formats. It can also keep track of seconds, minutes, hours, days, weekdays, months, and years. This flexibility allows it to be easily integrated into different types of applications with varying timekeeping requirements.
- Additionally, it has an alarm function that can be set to trigger at a specific time or date. The alarm can be used to wake up the system from a low - power state, enabling energy - efficient operation.
### 2.4 I²C Interface
- The PCF8523T/1,118 uses the widely adopted I²C (Inter - Integrated Circuit) interface for communication with the host microcontroller. The I²C interface is a simple and efficient serial communication protocol that requires only two wires (SDA and SCL) for data transfer.
- This makes it easy to integrate the RTC into existing systems, as most microcontrollers support the I²C interface. The I²C interface also allows for easy configuration of the RTC's registers, such as setting the time, date, and alarm parameters.
### 2.5 Power Management Features
- The product series includes built - in power management features. It can automatically switch to a backup power source, such as a coin - cell battery, when the main power supply fails. This ensures that the timekeeping function continues uninterrupted, even during power outages.
- The power switchover is seamless, and the RTC can maintain its accuracy and functionality without any loss of data.
## 3. Applications
### 3.1 Consumer Electronics
- In smartphones, tablets, and smartwatches, the PCF8523T/1,118 can be used to provide accurate time and date information. It can also be used for scheduling alarms, reminders, and other time - sensitive events.
- In digital cameras, the RTC can be used to
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8-SOIC
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