Tiny Real-Time Clock/Calendar with
Alarm Function and I²C-Bus
PCF85063A
Last Updated: Apr 9, 2022
The PCF85063ATL is a CMOS Real-Time Clock (RTC) and calendar optimized for low power
consumption. An offset register allows fine-tuning of the clock. All addresses and data are
transferred serially via the two-line bidirectional I²C-bus. Maximum data rate is 400 kbit/s. The
register address is incremented automatically after each written or read data byte.
PCF85063A Block Diagram Block Diagram
aaa-004429
PCF85063A
CLKOUT
CLKOEOSCO
VDD
VSS
SDA
SCL
OSCI
INT
DIVIDER
32 kHz
OSCILLATOR
POWER-ON
RESET
l
2
C-BUS
INTERFACE
CLOCK OUT
INTERRUPT
CONTROL
REAL-TIME
CLOCK
SYSTEM
CONTROL
ALARM AND
TIMER
CONTROL
CLOCK
CALIBRATION
OFFSET
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