PCA8565 Datasheet, PDF(1/39 Page) NXP Semiconductors

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PCA8565 Datasheet, PDF (1/39 Pages) NXP Semiconductors – Real time clock/calender

PCA8565

Real time clock/calendar

Rev. 02 â 16 June 2009

Product data sheet

1. 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.

2. Features

I Provides year, month, day, weekday, hours, minutes and seconds based on a

32.768 kHz quartz crystal

I Century ï¬ag

I Clock operating voltage: 1.8 V to 5.5 V

I Extended operating temperature range: â40 Â°C to +125 Â°C

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

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

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

1 Hz)

I Alarm and timer functions

I Internal power-on reset

I I2C-bus slave address: read A3h and write A2h

I Open-drain interrupt pin

I One integrated oscillator capacitor

3. Applications

I Automotive

I Industrial

I Other applications that require a wide operating temperature range

1. The deï¬nition of the abbreviations and acronyms used in this data sheet can be found in Section 16.

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