The PCF2127AT is a CMOS Real Time Clock (RTC) and calendar with an integrated Temperature Compensated Crystal (Xtal) Oscillator (TCXO) and a 32.768 kHz quartz crystal optimized for very high accuracy ...
The temperature dependent characteristics of quartz crystals prevent time keeping also with state-of-the-art real time clocks from being highly accurate over a wide temperature range, unless ...
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