DS1302 SMD RTC Real-Time Clock IC ⏱️

The DS1302 is a compact, low-power Real-Time Clock (RTC) integrated circuit in a SOIC-8 SMD package, ideal for precise timekeeping in embedded systems, Arduino and Raspberry Pi projects, and other microcontroller-based designs. Engineered for reliability and efficiency, it delivers accurate time and date tracking while minimizing power consumption—perfect for battery-backed applications and compact electronics modules.

Key Features ✅

• Accurate real-time clock with seconds, minutes, hours, day, date, month, and year tracking.
• Integrated oscillator circuit for a standard 32.768 kHz watch crystal (external crystal required) for improved precision.
• Ultra-low power timekeeping, optimized for battery-powered designs.
• 3-wire serial I/O interface with a minimal pin count for easy integration with Arduino, Raspberry Pi, and other microcontrollers.
• Automatic power-fail detection and switching to maintain timekeeping during main power loss.
• Compact SOIC-8 SMD package for space-constrained electronics components and modules.

Technical Specifications ⚙️

• Operating Voltage: 2.0 V to 5.5 V
• Operating Temperature: -40°C to +85°C
• Timekeeping Current: Less than 300 nA
• Package Type: SOIC-8 SMD
• Interface: 3-wire serial (CE, I/O, SCLK)
• Oscillator: External 32.768 kHz crystal required

Compatibility and Integration 🔌

Works seamlessly with popular development platforms including Arduino, Raspberry Pi, ESP32, and other microcontroller boards. Its low voltage operation and simple serial interface make it easy to add precise timekeeping to embedded electronics projects.

Potential Applications 🎯

• Embedded systems
• Industrial control systems
• Security systems
• Home automation systems
• Portable electronics

Notes for Designers 🛠️

• An external 32.768 kHz crystal and optional backup battery are recommended for stable, continuous timekeeping.
• This device uses a 3-wire serial interface (not I2C); software bit-banging or a compatible SPI mode is commonly used.