PCA8565 Datasheet, PDF (1/26 Pages) NXP Semiconductors – Real time clock/calender

PCA8565
Real time clock/calender
Rev. 01 — 31 March 2003
Product data
1. General description
The PCA8565 is a CMOS real time clock/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.
2. Features
s Provides year, month, day, weekday, hours, minutes and seconds based on
32.768 kHz quartz crystal
s Century flag
s Clock operating voltage: 1.8 to 5.5 V
s Extended operating temperature range: −40 to +125 °C
s Low backup current; typical 0.5 µA at V_DD = 3.0 V and T_amb = 25 °C
s 400 kHz two-wire I²C-bus interface (at V_DD = 1.8 to 5.5 V)
s Programmable clock output for peripheral devices (32.768 kHz, 1024 Hz,
32 Hz and 1 Hz)
s Alarm and timer functions
s Integrated oscillator capacitor
s Internal power-on reset
s I²C-bus slave address: read A3H and write A2H
s Open-drain interrupt pin.
3. Applications
s Automotive
s Industrial
s Other applications that require a wide operating temperature range.
4. Quick reference data
Table 1:
Symbol
V_DD
Quick reference data
Parameter
supply voltage
I_DD
T_amb
supply current
ambient temperature
Conditions
I²C-bus active; f_SCL = 400 kHz;
T_amb = −40 to +125 °C
f_SCL = 400 kHz
Min Typ Max Unit
1.8 -
5.5 V
-
-
−40 -
820 µA
+125 °C