Description
DS1307 Real-Time Clock (RTC) IC
The DS1307 RTC IC is a widely used low-power Real-Time Clock (RTC) designed to keep accurate time and calendar information even when the main system power is turned off. By using a 3V backup battery (CR2032), the DS1307 continues operating during power interruptions, making it ideal for applications requiring continuous timekeeping.
The IC communicates through a simple I²C (Two-Wire) interface, allowing seamless integration with microcontrollers such as Arduino, STM32, ESP32, ESP8266, Raspberry Pi, and other embedded platforms.
The DS1307 tracks seconds, minutes, hours (12/24-hour format), day, date, month, and year, with automatic leap-year compensation up to the year 2100. It also includes 56 bytes of battery-backed SRAM for storing user data and provides a programmable square-wave output for timing applications.
The device requires an external 32.768 kHz crystal oscillator for accurate clock generation and is commonly available in an 8-pin DIP package, making it suitable for breadboards, development boards, and PCB prototyping.
Applications
- Real-Time Clock Modules
- Arduino Projects
- STM32 Development Boards
- ESP32 & ESP8266 Projects
- Raspberry Pi Interfaces
- Embedded Systems
- IoT Devices
- Data Logging Systems
- Industrial Automation
- Digital Clocks
- Home Automation
- Battery-Backed Timekeeping
Technical Specifications
| Specification | Details |
|---|---|
| Product Name | DS1307 RTC IC |
| Device Type | Real-Time Clock (RTC) IC |
| Package Type | 8-Pin DIP |
| Communication Interface | I²C (Two-Wire) |
| Operating Voltage (VCC) | 4.5V – 5.5V DC |
| Backup Supply | 3V Battery (VBAT) |
| Oscillator | External 32.768 kHz Crystal |
| Time Format | 12-Hour / 24-Hour |
| SRAM | 56 Bytes Battery-Backed |
| Square Wave Output | 1Hz, 4.096kHz, 8.192kHz, 32.768kHz |
| Battery Backup Current | <500 nA (Typical) |
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