PCF2127AT/2Y

NXP  PCF2127AT/2Y  芯片, 实时时钟/日历, I2C/SPI, SOIC-20

The is an accurate Real Time Clock with an integrated temperature compensated crystal Xtal oscillator TCXO and a 32.768kHz quartz crystal optimized for very high accuracy and very low power consumption. This has 512bytes of general-purpose static RAM, a selectable I²C-bus or SPI-bus, a backup battery switch-over circuit, a programmable watchdog function and a timestamp function.

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Timestamp function with interrupt capability

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3 Line SPI-bus with separate data input and output

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Battery backup input pin and switch-over circuitry

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Extra power fail detection function with input and output pins

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Oscillator stop detection function

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Open-drain interrupt output

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Programmable countdown timer with interrupt