PCF8563T/5 I2C Real-Time Clock/Calendar IC is a low-power CMOS real-time clock and calendar IC designed for accurate time and datekeeping in electronic systems. It communicates through a two-wire I²C interface and provides seconds, minutes, hours, day, weekday, month, and year information. The IC also includes alarm and timer functions, a programmable clock output, interrupt output, voltage-low detection, and an integrated oscillator capacitor, making it suitable for embedded systems, digital clocks, meters, data loggers, and battery-powered applications.
| Parameter | Value |
|---|---|
| Product Type | Real-Time Clock / Calendar IC |
| Model | PCF8563T/5 |
| Brand | NXP |
| Interface | I²C |
| Maximum I²C Bus Speed | 400 kHz |
| Clock Frequency | 32.768 kHz |
| Clock Operating Voltage | 1.0 V to 5.5 V |
| I²C Operating Voltage | 1.8 V to 5.5 V |
| Typical Backup Current | 0.25 µA |
| Clock Output Frequencies | 32.768 kHz, 1.024 kHz, 32 Hz, 1 Hz |
| Time Format | 24-Hour |
| Date Format | Year, Month, Day, Weekday |
| Interrupt Output | Open-Drain, Active LOW |
| Package | SOIC-8 / SOP-8 |
| Mounting Type | Surface Mount |
| Operating Temperature | -40°C to +85°C |

| Pin No. | Pin Name | Description |
|---|---|---|
| 1 | OSCI | Oscillator Input |
| 2 | OSCO | Oscillator Output |
| 3 | INT | Interrupt Output, Open-Drain Active LOW |
| 4 | VSS | Ground |
| 5 | SDA | I²C Serial Data Input/Output |
| 6 | SCL | I²C Serial Clock Input |
| 7 | CLKOUT | Programmable Clock Output, Open-Drain |
| 8 | VDD | Supply Voltage |
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1 × PCF8563T/5 I2C Real-Time Clock/Calendar IC - SOP-8 Package
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