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PCA85073A CMOS Real-Time Clock/Calendar is an automotive-grade RTC, 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. The PCA85073A features a maximum data rate of up to 400kbit/s. The register address is incremented automatically after each written or read data byte.
AEC-Q100 grade 2 compliant for automotive applications
Provides year, month, day, weekday, hours, minutes, and seconds based on a 32.768kHz quartz crystal
Low current; typical 0.25µA at VDD = 3.0V and Tamb = +25°C
Programmable clock output for peripheral devices (32.768kHz, 16.384kHz, 8.192kHz, 4.096kHz, 2.048kHz, 1.024kHz, and 1.0Hz)
Minute and half minute interrupt
Internal Power-On Reset (POR)
-40°C to +105°C operating temperature range
0.9V to 5.5V clock operating voltage
400kHz two-line I2C-bus interface (at VDD = 1.8V to 5.5V)
Selectable integrated oscillator load capacitors for CL = 7pF or CL = 12.5pF
Oscillator stop detection function
Programmable offset register for frequency adjustment
Latch-up performance exceeds 100mA per JESD 78, Class II