From Makers Electronics's description

The DS1307 is a low power Full Binary (BCD) Real Time Clock (RTC) IC with 56 bytes of SVRAM that communicates through I2C Protocol. The IC can work from directly supply on Vcc and switch to Battery automatically when required. Pin Configuration Pin Number Pin Name Description 1,2 X1 , X2 Crystal Oscillator should be connected to these pins 3 V-Bat Connected to Positive terminal of the battery 4 Ground Ground pin of the IC 5,6 SCL and SDA Pins for I2C communication with CPU 7 SQW / Out Square wave output driver pin to obtain square wave frequencies. 8 Vcc Powers the IC typically 5V DS1307 Specifications I2C Interface RTC IC Operating Voltage: 5V Less than 500nA current when operating with battery 56bytes SVRAM Operates in power or battery mode Programmable square wave output pin Available in PDIP and SO package How to use DS1307 The DS1307 is a 8-pin IC which operates on 5V and communicates with CPU though I2C protocol. A typical application circuit for the DS1307 from DS1307 datasheet is shown below. As you can see the IC has SCL (Serial Clock) and SDA (Serial Data) pins using which it communicates to the CPU, both these pins has to be pulled high using a resistor. The IC can be powered by providing 5V on the Vcc pin, when the power fails it will automatically switch to battery operated mode in which it will obtain power with Lithium cell connected to pin Vbat and ground. The pins X1 and X2 are used to connect the crystal oscillator; typically a 32.7KHz Quartz crystal is used. The SQW pin is used to provide a PWM square wave of programmable frequencies in the range of 1Hz, 4KHz, 8KHZ or 32KHz. This pin also requires a pull up resistor. Data between the CPU and RTC IC is exchanged only though the I2C protocol. Both Read and write happens through this communication. The IC can provide details like Real-Time Clock Counts Seconds, Minutes, Hours, Date of the Month, Month, Day of the Week, and Year with Leap-Year Compensation Valid Up to 2100. Applications · Robotics · Gaming · Servers · Computer Peripherals · GPS · Utility power meters 2D-Model (PDIP 8-pin) DS1307 Datasheet

From Makers Electronics's description

DS1307 Real Time Clock (RTC) Module The DS1307 Real Time Clock (RTC) Module is a popular timekeeping module designed to maintain accurate time and calendar information even when the main system power is removed. Based on the DS1307 RTC IC, it communicates via the I2C interface, making it easy to connect with Arduino, Raspberry Pi, ESP32, STM32, PIC, AVR, and many other development platforms. A backup coin cell battery ensures that the clock continues running during power outages, preserving the current time and date. This module is ideal for applications requiring reliable timekeeping, such as data logging, automation systems, clocks, alarms, timers, and IoT devices. Many versions also include an onboard 32.768kHz crystal oscillator and AT24C32 EEPROM for additional non-volatile data storage, making the module a versatile solution for embedded electronics projects. Features: Accurate real-time clock and calendar functions. Battery backup for continuous timekeeping during power loss. Simple I2C communication interface. Supports seconds, minutes, hours, day, date, month, and year. Automatic leap year compensation. Low power consumption. Onboard crystal oscillator for stable operation. Easy interface with popular microcontrollers. Compatible with Arduino, Raspberry Pi, ESP32, STM32, AVR, and PIC. Compact PCB for embedded applications. Optional onboard EEPROM on many module versions. Specification: Parameter Value RTC IC DS1307 Communication Interface I2C Operating Voltage 5V DC Backup Battery CR2032 Coin Cell (not always included) Clock Accuracy Depends on crystal accuracy Time Format 12-hour / 24-hour Calendar Year, Month, Date, Day Time Data Hours, Minutes, Seconds Leap Year Compensation Supported Crystal Frequency 32.768kHz EEPROM AT24C32 (available on many versions) Pinout: Applications: Digital clocks. Alarm systems. Data logging projects. Home automation. Industrial controllers. IoT devices. Scheduling systems. Attendance systems. Time-stamping applications. Embedded control systems. Package Includes: 1x DS1307 Real Time Clock (RTC) Module.

From Future Electronics Egypt's description

The DS1307N+ is a 64 x 8, serial, I2C real-time clock (RTC) in 8 pin DIP package. It is a low power, full binary coded decimal (BCD) clock/calendar with 56bytes of NV SRAM. It has a supply voltage range from 4.5V to 5.5V, active supply current of 1.5mA and standby current of 200µA. Address and data are transferred serially through an I2C bidirectional bus. The clock/calendar provides seconds, minutes, hours, day, date, month and year information. The end of the month date is automatically adjusted for months with fewer than 31 days including leap year compensation valid up to 2100. The clock operates in either 24 hours or 12-hour format with AM/PM indicator. The DS1307 has built-in power sense circuit that detects power failures and automatically switches to backup supply. Timekeeping operation continues while the device operates from the backup supply. Features: UL recognized Operating temperature range from -40°C to 85°C Automatic power fail to detect and switch circuitry Timekeeping current of 300nA Completely manages all timekeeping functions 56byte, battery backed, general purpose RAM with unlimited writes A programmable square wave output signal Simple serial port interfaces to most microcontrollers Low power operation extends battery backup runtime Consumes less than 500nA in battery backup mode with oscillator running Applications: Clock & Timing

From Ampere Electronics's description

DS1307 Real Time Clock Module (RTC) Real-time clocks (RTC), as the name recommends are clock modules. The DS1307 real-time clock (RTC) IC is an 8 pin device using an I2C interface. The DS1307 is a low-power clock/calendar with 56 bytes of battery backup SRAM. The clock/calendar provides seconds, minutes, hours, day, date, month and year qualified data. The end date of each month is automatically adjusted, especially for months with less than 31 days. Pin Configurations: Pin Number Pin ?Name Description 1,2 X1 , X2 Crystal Oscillator should be connected to these pins 3 V-Bat Connected to Positive terminal of the battery 4 Ground Ground pin of the IC 5,6 SCL and SDA Pins for I2C communication with CPU 7 SQW / Out Square wave output driver pin to obtain square wave frequencies. 8 Vcc Powers the IC typically 5V Features: I2C Interface RTC IC Operating Voltage: 5V Less than 500nA current when operating with battery 56bytes SVRAM Operates in power or battery mode Programmable square wave output pin Available in PDIP and SO package Applications: Robotics Gaming Servers Computer Peripherals GPS Utility power meters Package Includes: 1x RTC DS1307 Real-Time Clock Module 1x CR2032 Battery Datasheet: DS1307 Real Time Clock Module Related Products: SENSORS | MODULES

From Micro Ohm's description

Description: The DS1307 I2C Real Time Clock chips (RTC) I2C EEPROM Memory 24C32 32K Adopt LIR2032 rechargeable lithium battery, with the charging circuit Solved the problem of DS1307 with battery backup can not read and write. Fully charged, can provide the DS1307 timing for 1 year . Compact design, 27mm * 28mm * 8.4mm Lead off clock pin of DS1307? to provide clock signal for MCU . Can be cascaded to other I2C devices