PCF8523TK/1,118

NXP  PCF8523TK/1,118  芯片, 实时时钟

The is a CMOS Real-time Clock RTC and Calendar optimized for low power consumption. It provides year, month, day, weekday, hours, minutes and seconds based on a 32.768kHz quartz crystal. Data is transferred serially via the I²C-bus with a maximum data rate of 1000kbps. 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.

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Seconds to years resolution

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Battery backup input pin and switch-over circuit

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Freely programmable timer and alarm with interrupt capability

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Oscillator stop detection function

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Internal power-ON Reset POR

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Open-drain interrupt or clock output pins

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Programmable offset register for frequency adjustment

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Selectable integrated oscillator load capacitors for CL=7pF or CL=12.5pF