BMT DS1307 Real Time Clock Module I2C 24C32 EEPROM

Features:
- Based on the DS1307 Real-Time Clock IC.
- Provides real-time seconds, minutes, hours and calendar information.
- Automatic adjustment for different month lengths.
- Includes leap-year compensation.
- 24-hour or 12-hour time format support.
- I2C two-wire serial communication.
- Includes 24C32 32K I2C EEPROM.
- Programmable square-wave clock output.
- Automatic power-failure detection and battery switching.
- Low-power battery backup operation.
- Onboard battery holder.
- Supports rechargeable LIR2032 battery according to the supplied specifications.
- Includes charging circuitry for the rechargeable backup battery.
- Battery not included.
- Compact module measuring approximately 27mm x 28mm x 8.4mm.
- Can be connected to other compatible I2C devices.
- Suitable for Arduino and microcontroller-based projects.

Specifications:

Module Specifications:
- Product Code: BMT REAL TIME CLOCK-DS1307
- Product Type: Real-Time Clock Module
- RTC IC: DS1307
- Memory IC: 24C32
- Memory Capacity: 32Kbit I2C EEPROM
- Communication Interface: I2C
- Clock Backup: Battery supported
- Battery Type: LIR2032 rechargeable lithium battery
- Battery Included: No
- Battery Charging Circuit: Included
- Module Dimensions: Approximately 27 x 28 x 8.4mm
- Weight: Approximately 8g
- I2C Device: Yes
- Square-Wave Output: Programmable
- DS1307 RTC Specifications
- Timekeeping: Seconds, minutes, hours, day, date, month and year
- Calendar: Automatic month/day adjustment
- Leap-Year Compensation: Supported
- Year Range: Supports calendar operation through 2100 according to the supplied specification
- Time Format: 12-hour / 24-hour
- Memory: 56 bytes of battery-backed RAM
- Communication: Two-wire bidirectional serial interface
- Square-Wave Output: Programmable
- Power-Failure Detection: Integrated
- Automatic Battery Switching: Integrated
- Backup Current: Less than 500nA according to the supplied specification
- DS1307 Real-Time Clock
- The DS1307 is designed to maintain time and calendar information independently of the main microcontroller program. It keeps track of multiple time and date parameters, including:

• Seconds
• Minutes
• Hours
• Day of the week
• Day of the month
• Month
• Year
• The device also provides automatic calendar adjustment and leap-year compensation, reducing the amount of timekeeping logic that needs to be handled by the host microcontroller.

24C32 EEPROM Memory:
- In addition to the RTC, this module includes a 24C32 32Kbit I2C EEPROM. This provides non-volatile memory that can be used to retain information even when the main system is powered down.

Depending on the application, the EEPROM can be used for storing:
- Configuration settings
- Calibration values
- Device parameters
- User preferences
- Small data records
- System information
- Project-specific settings
- The EEPROM communicates over the I2C bus, allowing it to share the same communication interface with the RTC and other compatible I2C devices.

Battery Backup:
- The DS1307 module incorporates a backup power system to maintain timekeeping when the primary power supply is unavailable. The supplied specifications identify a rechargeable LIR2032 battery as the intended battery type and state that the module includes a charging circuit.
- The battery is not included with this product.
- Only a suitable rechargeable battery should be used where the onboard charging circuit is active. Do not substitute a non-rechargeable CR2032 battery if the module's charging circuit is connected to the battery.

I2C Communication:
- The module uses a standard two-wire I2C interface, requiring only the appropriate SDA and SCL connections along with power and ground.
- This makes it easy to integrate the RTC into systems based on compatible development platforms and microcontrollers. Other I2C-compatible devices can also share the same bus when correctly configured.

• This makes it easy to integrate the RTC into systems based on compatible development platforms and microcontrollers. Other I2C-compatible devices can also share the same bus when correctly configured.

Applications:
- The BMT DS1307 RTC module is suitable for a wide range of electronics and embedded applications, including:

• Arduino projects
• Microcontroller projects
• Digital clocks
• Electronic calendars
• Data logging systems
• Time-stamped data recording
• Automation systems
• Access-control systems
• Programmable timers
• Alarm systems
• Industrial control projects
• Smart-home projects
• Embedded devices
• Robotics projects
• Monitoring equipment
• Battery-backed timekeeping applications
• Data Logging Applications

• When combined with a microcontroller and suitable storage system, the RTC can provide accurate timestamps for recorded events and sensor measurements.

• For example, a data logger can use the DS1307 to record the time and date at which a temperature, humidity or other sensor measurement was taken. The additional 24C32 EEPROM can also be used to retain configuration values or other small amounts of important system data.

Compact Design:
- The compact 27mm x 28mm x 8.4mm module is suitable for integration into development projects, prototype enclosures and embedded systems where PCB space is limited.

• Its combination of an RTC, EEPROM and backup-battery circuitry provides multiple useful functions on a single module, reducing the need for separate boards.
• Battery is not included

Important Battery Note:
- The supplied specifications identify the intended backup battery as a rechargeable LIR2032 and state that the module includes a charging circuit. Use the correct rechargeable battery type when using the charging function. A standard non-rechargeable CR2032 should not be connected to a charging circuit.

What's in the box
1 x BMT DS1307 Real Time Clock Module I2C 24C32 EEPROM