NXP Semiconductors PCA85073A CMOS Real-Time Clock/Calendar

NXP Semiconductors 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 NXP PCA85073A features a maximum data rate of up to 400kbit/s. The register address is incremented automatically after each written or read data byte.

Features

AEC-Q100 grade 2 compliant for automotive applications
Provides year, month, day, weekday, hours, minutes, and seconds based on a 32.768kHz quartz crystal
0.25µA typical low current at V_DD = 3.0V and T_amb = +25°C
Programmable clock output for peripheral devices (32.768kHz, 16.384kHz, 8.192kHz, 4.096kHz, 2.048kHz, 1.024kHz, and 1.0Hz)
Alarm function
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 V_DD = 1.8V to 5.5V)
Selectable integrated oscillator load capacitors for CL = 7pF or CL = 12.5pF
Countdown timer
Oscillator stop detection function
Programmable offset register for frequency adjustment
Latch-up performance exceeds 100mA per JESD 78, Class II
ESD protection exceeds JESD 22
- 4000V Human-Body Model (A114-A)
- 1000V Charged-Device Model (C101)
TSSOP-8 package