Real-Time Clock (PCF8523)

Keep accurate time even when your project powers down with this battery-backed RTC module. Built around the PCF8523, it maintains date and time with a coin cell backup so you never lose track of when events happen. Perfect for data logging, scheduling tasks, timestamping sensor readings, or any project that needs to know the current time. The module includes STEMMA QT connectors for easy I²C daisy-chaining and generates an interrupt signal for alarm functions or periodic timing events. The onboard crystal provides accurate timekeeping, while the battery ensures your clock keeps running through power cycles. Drop it into any backplane and access reliable timekeeping with Arduino IDE, MicroPython, or MicroBlocks. Use it standalone with any microcontroller, or snap it into the Genesis Modular system from Axiometa for plug-and-play integration. Works with Arduino IDE, MicroPython, or MicroBlocks.

- 22 mm × 22 mm Board
- 4× ⌀2.7 mm Mounting Holes
- PCF8523 RTC
- Battery-Backed Timekeeping
- I²C Interface
- 1.8 V, 3.3 V, 5.0 V Compatible
- Arduino IDE Compatible
- MicroPython Compatible
- MicroBlocks Compatible

Material Datasheet
Circuit Schematic
3D Model (STEP)
Pinout Diagram