MINI RTC MODULE (raspberry pi b/b+/Arduino) DS1307ZN+

The DS1307ZN+ Real-Time Clock (RTC) module is a compact solution for maintaining accurate time and date on your Raspberry Pi or Arduino-based projects, even when the main power supply is disconnected. Using the I2C bus, it integrates seamlessly with the Raspberry Pi's dedicated GPIO pins (GPIO 2/3) or any compatible microcontroller board via two digital lines.

The circuit features the Maxim Integrated DS1307ZN+ chip and a holder for a CR1220 coin cell battery. It counts seconds, minutes, hours, days, dates, months, and years, with leap-year compensation valid until 2100. A programmable square-wave output allows you to generate external interrupt or clock signals at selectable frequencies.

Specifications

• Chip: Maxim Integrated DS1307ZN+
• Interface: I2C bus (2-wire)
• Operating Voltage: 5 V DC
• Backup Power: CR1220 coin cell battery (not included)
• Battery-Backup Current Consumption: < 500 nA
• Accuracy: ±2 ppm from -40 °C to +85 °C
• Features: Automatic power-fail detection, programmable square-wave output (1 Hz, 4 kHz, 8 kHz, 32 kHz)
• Calendar: Full count with leap-year compensation valid until 2100
• Operating Temperature: -40 °C to +85 °C