Real Time Clock DS1307 RTC I2C Module AT24C32 with CR2032 Coin Battery

The Real Time Clock (RTC) DS1307 I2C Module with AT24C32 EEPROM and CR2032 Coin Battery is a precise and reliable timekeeping solution for embedded systems and electronic projects. The DS1307 RTC is a low-power, I2C interface real-time clock that provides accurate time tracking with a 32.768 kHz crystal oscillator. This module also includes a built-in AT24C32 EEPROM (32Kb), which allows for storing data that needs to be preserved even when the system is powered off. The included CR2032 coin battery ensures that the clock continues to keep time even when the primary power supply is turned off, providing reliable backup power. The I2C interface makes it easy to integrate the RTC module into projects, using only two data pins for communication, making it a perfect fit for Arduino, Raspberry Pi, and other microcontroller-based systems. Whether you're working on time-sensitive applications, data logging, or low-power systems, this module provides a simple and effective solution for real-time timekeeping.

Pin Description of DS1307:

Pin 1, 2: Connections for standard 32.768 kHz quartz crystal. The internal oscillator circuitry is intended for operation with a crystal having a specified load capacitance of 12.5pF. X1 is the input to the oscillator and can alternatively be connected to an external 32.768 kHz oscillator. The output of the internal oscillator, X2 is drifted if an external oscillator is connected to X1.

Pin 3: Battery input for any standard 3V lithium cell or another energy source. Battery voltage should be between 2V and 3.5V for suitable operation. The nominal write-protect trip point voltage at which access to the RTC and user RAM is denied is set by the internal circuitry as 1.25 x VBAT nominal. A lithium battery with 48mAhr or greater will backup the DS1307 for more than 10 years in the absence of power at 25ºC. UL recognized to ensure against reverse charging current when utilized as a part of conjunction with a lithium battery.

Pin 4: Ground.

Pin 5: Serial data input/output. The input/output for the I2C serial interface is the SDA, which is the open drain and requires a pull-up resistor, allowing a pull-up voltage to 5.5V. Regardless of the voltage on VCC.

Pin 6: Serial clock input. It is the I2C interface clock input and is used in data synchronization.

Pin 7: Square wave/output driver. When enabled, the SQWE bit set to 1, the SQW/OUT pin outputs one of four square-wave frequencies (1Hz, 4 kHz, 8 kHz, and 32 kHz). This is also an open drain and requires an external pull-up resistor. It requires the application of either Vcc or Vb at to operate SQW/OUT, with an allowable pull-up voltage of 5.5V and can be left floating, if not used.

Pin 8: Primary power supply. When the voltage is applied within normal limits, the device is fully accessible and data can be written and read. When a backup supply is connected to the device and VCC is below VTP, read and writes are inhibited. However, at low voltages, the timekeeping function still functions.

Features :

1. This is the DS1307 Real Time Clock developed by one of our designers.
2. Two-wire I2C interface.
3. Hour: Minutes: Seconds AM/PM.
4. Day Month, Date – Year.
5. DS1307 based RTC with LIR2032 battery (Battery include).
6. 1Hz output pin.
7. Consumes less than 500nA in battery backup mode with oscillator running
8. Available in 8-pin DIP or SOIC
9. Underwriters Laboratory (UL) recognized
10. Real-time clock (RTC) counts seconds, minutes, hours, date of the month, month, day of the week, and year with leap-year compensation valid up to 2100
11. 56-byte non-volatile RAM for data storage
12. 56 Bytes of Non-volatile memory available to the user.
13. The DS1307 is accessed via the I2C protocol.
14. The module comes fully assembled and pre-programmed with the current time.

Specification:-

Package Includes :

1 x RTC DS1307 24C32 Real-Time Clock Module