DS1302 Real Time Clock Module

The DS1302 is a trickle-charge clock chip containing a real-time clock/calendar and 31 bytes of static RAM. It communicates with a microcontroller via a simple serial interface.

Features

• 31 x 8 byte temporary data storage RAM
• Serial I/O port minimizes required pins
• Wide operating voltage range: 2.0V to 5.5V
• Low current consumption: less than 300nA at 2.0V
• Read/write clock or RAM data in single-byte or multi-byte transfer modes
• Available in 8-pin DIP or SOIC package
• Simple 3-wire interface
• TTL-compatible (Vcc = 5V)
• Optional industrial temperature range: -40°C to +85°C
• Dual power pins for main and backup power supply

Specifications

• PCB size: 42mm x 24mm x 12mm (max)
• Color: Green
• Battery: CR2032 (3V, 260mAh, non-rechargeable)
• Crystal: 32.768KHz, 6pF matching capacitance, 2mm x 6mm size
• Operating voltage: 3.3V or 5V
• Operating temperature: 0°C to 70°C

Wiring (Example for reference)

**Important Note:** VCC and GND must not be reversed to avoid damaging the chip.

• VCC → +5V/3.3V
• GND → GND
• CLK → P02 (Microcontroller Pin)
• DAT → P01 (Microcontroller Pin)
• RST → P00 (Microcontroller Pin)

**Note:** The specific microcontroller pin connections may vary. You might need to adjust these based on your program and microcontroller configuration.

Package Includes

• 1 x DS1302 Real Time Clock Module with battery
• Note: Color Might Be Blue Or Green