Mikroe RTC 27 Click Add-On Board
Mikroe RTC 27 Click Add-On Board provides low-power real-time clock and calendar functions for embedded systems that need accurate time tracking, alarm events, watchdog timing, and timestamp capture. This board is based on the NXP PCF8525 nano-power CMOS RTC and communicates through an I2C interface, making it suitable for host systems that support the mikroBUS™ standard. The device supports calendar and time data down to 1/100-second resolution, programmable alarm and watchdog interrupt functions, battery backup with automatic switch-over circuitry, and two interrupt outputs with onboard jumper routing options. The RTC 27 Click also includes ClickID for automatic board identification and Click Snap for reduced-size implementation during later prototyping stages. Mikroe RTC 27 Click Add-On Board targets portable instruments, wearable devices, industrial systems, and IoT applications that require reliable timekeeping with low power use.
Features
- Based on the NXP PCF8525 nano-power CMOS RTC and calendar IC
- Integrated temperature compensation engine with aging offset adjustment
- Programmable alarm function, watchdog timer, and timestamp function with interrupt support
- Battery backup input with automatic switch-over circuitry
- Two configurable interrupt outputs with onboard jumper selection
- ClickID support
- Click Snap support
- mikroBUS compatibility
Applications
- Portable instruments
- Wearable devices
- Industrial systems
- IoT timekeeping applications
- Battery-powered and always-on designs
Specifications
- 64nA typical current consumption in timekeeping mode at VDD = 3.3V
- Typical ±30ppm timekeeping accuracy across temperature
- I2C interface
- 57.15mm x 25.4mm dimensions
- 3.3V or 5V input voltage
- -40°C to +85°C PCF8525 operating temperature range
Layout
