Analog I2C Real-Time Clocks (RTC) 

Real-time clocks (RTC) are used to keep track of time. Maintaining accurate time at the lowest power consumption is critical, especially when the main power is turned off to conserve battery power or in battery powered applications like smart meters. NXP® offers a wide variety of highly accurate, low-power, small-package and automotive qualified real-time clocks in both I2C and SPI serial interfaces to suit your needs.

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