New from NXP Semiconductors is the PCF85063 family of tiny real-time clocks operating at very low voltages down to 0,9 V. With a size of 2 x 3 x 0,75 mm and a pin pitch of 0,5 mm, the PCF85063TP tracks time and date from seconds to years, and is one of the smallest RTCs in the world. In addition to electronic frequency tuning, the RTCs can also be programmed to generate an interrupt every 30 or 60 seconds, communicating via a Fast-mode I²C bus operating up to 400 kHz. Measuring 2,6 x 2,6 x 0,5 mm, the PCF85063ATL and PCF85063BTL are similarly tiny, with additional features including an alarm facility and a countdown timer controlled via an I²C or SPI bus.
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