DS1307 Real-Time Clock Module – HW-111 I²C
The DS1307 Real-Time Clock (RTC) Module keeps track of time and date, even when the main power is switched off, provided a suitable backup battery is installed.
Ideal for Arduino projects, digital clocks, timers, alarms and data logging applications.
Quick Specifications
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Feature
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Specification
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Model
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HW-111
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RTC IC
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DS1307
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Operating Voltage
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5V DC
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Interface
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I²C
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I²C Address
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0x68
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Time Format
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12-hour / 24-hour
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Calendar
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Seconds, minutes, hours, day, date, month and year
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Backup Battery
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3V CR2032 (not included unless supplied)
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Crystal
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32.768kHz
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Memory
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56 bytes battery-backed SRAM
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Square Wave Output
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Programmable
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Compatibility
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Arduino and other compatible microcontrollers
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Connections: VCC, GND, SDA and SCL, with additional connections depending on the module configuration.
Note: The DS1307 requires a 5V supply for normal operation and is not a precision temperature-compensated clock.
This product was added to our catalog on Saturday 24 October, 2026.
