Type RTC Applications Ideal for power-sensitive embedded systems such as medical devices, utility meters, data loggers, consumer electronics, and communication equipment On-board modules AM1815AQ - ultra-low power real-time clock IC from Ambiq Key Features Ultra-low power consumption, on-chip oscillator with ±2ppm digital calibration, integrated power management, rechargeable battery for standalone operation, SPI interface, Interrupts and watchdog, and more Interface SPI Feature ClickID Compatibility mikroBUS™ Click board size M (42.9 x 25.4 mm) Input Voltage 3.3V