PCF8523 Datasheet | NXP Semiconductors

Real-Time Clock (RTC) and calendar Rev. 7 - 28 April 2015 Product data sheet 1. General description The PCF8523 is a CMOS1 Real-Time Clock (RTC) and calendar optimized for low power consumption. Data is transferred serially via the I2C-bus with a maximum data rate of 1000 kbit/s. Alarm and timer functions are available with the possibility to generate a wake-up signal on an interrupt pin. An offset register allows fine-tuning of the clock. The PCF8523 has a backup battery switch-over circuit, which detects power failures and automatically switches to the battery supply when a power failure occurs. For a selection of NXP Real-Time Clocks, see Table 56 on page 68 2. Features and...