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PCF8563
PCF8563; Real-time clock/calendar
The PCF8563 is a CMOS real-time clock/calendar optimized for low power consumption. A programmable
clock output, interrupt output and voltage-low detector are also provided. All address and data are transferred
serially via a two-line bidirectional IC-bus. Maximum bus speed is 400 kbits/s. The built
register is incremented automatically after each written or read data byte.
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Provides year, month, day, weekday, hours, minutes and seconds based on 32.768 kHz quartz crystal
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Century flag
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Wide operating supply voltage range: 1.0 to 5.5 V
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Low back-up current; typical 0.25 A at V
DD = 3.0 V and Tamb =25°C
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400 kHz two-wire IC-bus interface (at V
DD = 1.8 to 5.5 V)
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Programmable clock output for peripheral devices: 32.768 kHz, 1024 Hz, 32 Hz and 1 Hz
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Alarm and timer functions
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Voltage-low detector
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Integrated oscillator capacitor
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Internal power-on reset
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IC-bus slave address: read A3H; write A2H
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Open drain interrupt pin.
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Mobile telephones
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Portable instruments
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Fax machines
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Battery powered products.
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