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General description

The PCA8565 is a CMOS1 real time clock and 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 I2C-bus. Maximum bus speed is 400 kbit/s. The built-in word address register is incremented automatically after each written or read data byte.

AEC-Q100 compliant (PCA8565TS) for automotive applications.

Features

Provides year, month, day, weekday, hours, minutes and seconds based on a 32.768 kHz quartz crystal

Century flag

Clock operating voltage: 1.8 V to 5.5 V

Extended operating temperature range:?40°C to +125°C

Low backup current; typical 0.65μA at VDD= 3.0 V and Tamb=25°C

400 kHz two-wire I2C-bus interface (at VDD= 1.8 V to 5.5 V)

Programmable clock output for peripheral devices (32.768 kHz, 1.024 kHz, 32 Hz and 1 Hz)

Alarm and timer functions

Internal power-on reset

I2C-bus slave address: read A3h and write A2h

Open-drain interrupt pin

One integrated oscillator capacitor

Applications

Automotive

Industrial

Other applications that require a wide operating temperature range