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
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