PCF2123TS/1
Ultra-low power real-time clock ICs with calendar and SPI interface
Manufacturer： nxp
series introduction
# Introduction to the PCF2123TS/1 Product Series
## 1. Overview
The PCF2123TS/1 is a highly advanced and reliable product series that belongs to the category of real - time clock (RTC) modules. RTCs are essential components in a wide range of electronic devices as they provide accurate timekeeping functionality, even when the main power source is interrupted. The PCF2123TS/1 series is designed to meet the demanding requirements of various applications, offering a combination of precision, low power consumption, and rich features.
## 2. Key Features
### 2.1 High - Precision Timekeeping
- The PCF2123TS/1 is equipped with a highly accurate oscillator circuit that ensures precise timekeeping. It can maintain an accuracy of up to a few parts per million (ppm), which means that the time error is extremely small over long periods. This high precision is crucial in applications such as industrial control systems, data loggers, and communication devices where accurate time stamps are required for proper operation and data analysis.
- It supports a wide range of time formats, including seconds, minutes, hours, days, months, and years. This allows for seamless integration into different systems that may have specific time - representation requirements.
### 2.2 Low Power Consumption
- One of the standout features of the PCF2123TS/1 series is its extremely low power consumption. In standby mode, the power consumption is minimized, making it ideal for battery - powered devices. This low power design helps to extend the battery life of the end - product, reducing the frequency of battery replacements and improving the overall user experience.
- The module can operate on a very low supply voltage, typically in the range of 1.2V to 5.5V. This wide voltage range provides flexibility in power supply options, allowing it to be used in a variety of electronic systems with different power requirements.
### 2.3 Alarm and Timer Functions
- The PCF2123TS/1 offers multiple alarm and timer functions. Users can set up to two independent alarms, which can be configured to trigger at specific times or intervals. These alarms can be used to wake up a system from a low - power state, initiate a specific task, or provide a time - based reminder.
- The timer function can be used for various purposes, such as measuring elapsed time, controlling the duration of a process, or implementing periodic tasks. The timer can be programmed with different time intervals, providing flexibility for different application scenarios.
### 2.4 I2C Interface
- It features an I2C (Inter - Integrated Circuit) interface, which is a widely used serial communication protocol in the electronics industry. The I2C interface allows for easy connection to microcontrollers, processors, and other digital devices. It simplifies the integration process and reduces the number of pins required for communication, making the PCF2123TS/1 suitable for compact and space - constrained designs.
- The I2C interface also supports high - speed data transfer, enabling quick and efficient communication between the RTC module and the host device.
### 2.5 Battery Backup
- The PCF2123TS/1 series is designed to support battery backup. When the main power supply fails, a backup battery can be connected to the module to ensure continuous timekeeping. This feature is essential in applications where uninterrupted timekeeping is critical, such as in security systems, medical devices, and automotive electronics.
- The module has a built - in battery switchover mechanism that automatically switches to the backup battery when the main power supply voltage drops below a certain threshold.
## 3. Applications
### 3.1 Consumer Electronics
- In smartwatches and fitness trackers, the PCF2123
Images for reference
14-TSSOP
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