RA-8565SA (For Automotive I2C-Bus Interface Real Time Clock Module)

RA-8565SARA-8565SA

Complies with EU RoHS directive. automotive
  • Built in frequency adjusted 32.768kHz crystal unit.
  • Interface Type
    I2C-Bus Interface(400kHz)
  • Wide operating voltage range
    1.8V to 5.5V
  • Wide voltage for timekeeping
    1.7V to 5.5V
    Ta=-40°C to +125°C
  • Extended operating temperature range
    -40°C to +125°C
  • 32.768kHz frequency output function
    N-ch Open drain output
    With Control Pin
  • The various functions include full calendar, alarm, timer,etc.
  • Conforms to AEC-Q200
  • *The I2C-Bus is a trademark of NXP Semiconductors

Block diagram

Block diagram


Overview

  • Wide operating temperature range for automotive
    • -40°C to +125°C
  • Clocking-status detection function
    • It can judge the validity of data after backup operation return by a status of VL-bit.
  • 32.768kHz frequency output function
    • CLKOUT pin output (N-ch Open Drain output )
    • Output frequency can be selected as 32.768kHz, 1024Hz, 32Hz, or 1Hz.
  • The various interrupt function
    • Timer function can be set up between 1/4096 second and 255 minutes.
    • Alarm function can be set to day of week, day, hour, or minute.

Pin function

Signal Name Input/Output Function
SCL Input Serial clock input.
SDA Bi-directional Data input and output.
CLKOUT Output The CLKOUT pin is a clock output (open drain output) pin
with control output. (Output frequency can be selected
as 32.768kHz, 1024Hz, 32Hz, or 1Hz.)
The CLKOE pin is an input pin used to control the output
mode of the CLKOUT output pin.
During the initial power-on (when power is applied from 0V),
if the CLKOE input pin is at high level ( = H),
the power-on reset function selects 32.768kHz as the frequency.
CLKOE Input
/INT Output Interrupts output by Alarm and Timer events. (Open drain output)
VDD - Connected to a positive power supply.
GND - Connected to a ground.

Terminal connection / External dimensions

Terminal connection External dimensions(Unit: mm)


Metal may be exposed on the top or bottom of this product. This will not affect any quality, reliability or electrical spec.


Specifications *Refer to application manual for details.

Recommend Operating Conditions

Item Symbol Condition Min. Typ. Max. Unit
Operating voltage VDD - 1.8 3.0 5.5 V
Timekeeper voltage VCLK - 1.7 3.0 5.5 V
Operating temperature TOPR - -40 +25 +125 °C

Frequency characteristics

Item Symbol Condition Rating Unit
Frequency stability Δ f/f Ta=+25°C
VDD=3.0V
5±23 *1 ×10-6
Oscillration start up time tSTA Ta=+25°C
VDD=1.8V
1.5Max. s
Ta=-40°C to +125°C
VDD=3.0V
3Max. s

*1) Equivalent to 1 minutes of monthly deviation.

Current consumption characteristics

Item Symbol Conditions Min. Typ. Max. Unit
Standby current. lBK fSCL=0Hz
CLKOE=LOW

VDD=5V
+125°C 1.10 1.8 µA
-40°C to +85°C 0.60 1.2
fSCL = 0Hz
CLKOE=LOW

VDD=3V
+125°C 1.00 1.6 µA
-40°C to +85°C 0.55 1.0
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