DS1307N Original 64 x 8 Serial I2C Real-Time Clock DIP-8 (DS1307N IC)
The DS1307N is an original, high-performance real-time clock (RTC) from Maxim Integrated. Organized as a 64 x 8 serial BCD clock/calendar with 56 bytes of NV SRAM, it is housed in a standard 8-pin DIP package. This IC provides complete timekeeping functions, tracking seconds, minutes, hours, date, month, day of the week, and year with automatic leap-year compensation valid up to 2100.
Designed for professional industrial applications, the "N" suffix signifies an extended industrial temperature range of -40 to 85 degrees Celsius. It features an integrated power-sense circuit that detects primary power failures and automatically switches to a backup battery, ensuring uninterrupted timekeeping with ultra-low current consumption.
Key Features
- Industrial Temperature Support: Operates reliably from -40 to +85 degrees Celsius.
- NV SRAM: 56 bytes of nonvolatile, battery-backed RAM for user data storage.
- I2C Interface: Simple 2-wire serial bus for easy integration with microcontrollers.
- Power Management: Automatic switch-over to battery backup during power loss.
- Programmable Output: Built-in square-wave output driver with selectable frequencies.
- Low Power: Consumes less than 500nA in battery-backup mode.
Specifications
- IC Type: Real-Time Clock (RTC) / Calendar
- Supply Voltage (VCC): 4.5V to 5.5V
- Battery Voltage (VBAT): 2.0V to 3.5V
- Timekeeping Current: 200uA (Max)
- Oscillator Frequency: 32.768 kHz
- Load Capacitance: 12.5pF
- Package Type: PDIP-8 (300-mil)
- Mounting Type: Through-Hole
Interfaces
- Pin 1 (X1): 32.768 kHz Crystal Input
- Pin 2 (X2): 32.768 kHz Crystal Output
- Pin 3 (VBAT): +3V Lithium Battery Input
- Pin 4 (GND): Ground
- Pin 5 (SDA): Serial Data I/O (Open Drain)
- Pin 6 (SCL): Serial Clock Input
- Pin 7 (SQW/OUT): Square Wave/Output Driver
- Pin 8 (VCC): Primary +5V Power Supply
