丝印：263A；Tiny Real-Time Clock/calendar with alarm function, battery switch-over, time stamp input, and I2C-bus

1. General description The PCF85263A is a CMOS1 Real-Time Clock (RTC) and calendar optimized for low power consumption and with automatic switching to battery on main power loss. The RTC can also be configured as a stop-watch (elapsed time counter). Three time log registers triggered from batt

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