| Price | $2 |
|---|---|
| Category | Others |
| Availability | Currently unavailable |
| Delivery | Shipped across Lebanon, or collect from the lab |
A real-time clock board built round the DS1302, with a 32.768 kHz crystal and a CR2032 holder already on it. The chip counts seconds through to years with leap-year correction to 2100 and keeps going on the coin cell when the project is unplugged, drawing under 300 nA while it does. Five pins - VCC, GND, CLK, DAT, RST - carry the simple 3-wire serial link, and there are 31 spare bytes of battery-backed RAM you can use for settings.
Key features
- DS1302 chip - seconds to years, leap year to 2100
- 3-wire serial interface on 5 pins: VCC, GND, CLK, DAT, RST
- CR2032 holder keeps time with the power off
- Under 300 nA in timekeeping mode at 2V
- 31 bytes of battery-backed RAM for your own data
- 32.768 kHz crystal fitted, 4 mounting holes
Details
Specifications
| Chipset | DS1302 |
|---|---|
| Function | Real-time clock / calendar |
| Operating voltage | 2.0-5.5V |
| Interface | 3-wire serial (CE/RST, I/O, SCLK) |
| Backup | CR2032 coin cell holder on board |
| Timekeeping current | Under 300 nA at 2.0V |
| RAM | 31 x 8 bytes, battery-backed |
| Crystal | 32.768 kHz |
| Pins | VCC, GND, CLK, DAT, RST (2.54 mm header) |
