RA-4565SA (for Automotive Serial Interface Real Time Clock Module)

  • Built in frequency adjusted 32.768 kHz crystal unit.
  • Interface Type
    4-wire serial interface
  • Wide operating voltage range
    1.6V to 5.5V
  • Wide Timekeeper voltage range
    1.5V to 5.5V
    Ta=-40°C to +125°C
  • Extended operating temperature range
    -40°C to +125°C
  • 32.768 kHz Clock/calendar function, auto leap year correction function
  • Applications : Car audio, Car navigation system, Clock, ECU sub clock
  • AEC-Q200 compliant


Complies with EU RoHS directive.


Block diagram

Block diagram


  • Wide operating temperature range
    • -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.
  • 32.768 kHz frequency output function
    • CLKOUT pin output (Open Drain output )
    • Output frequency can be selected as 32.768 kHz, 1024 Hz, 32 Hz, or 1 Hz.
  • The various interrupt function
    • Timer function can be set up between 1/4096 second and 255 minutes.

Specifications *Refer to application manual for details.

Recommend Operating Conditions

Item Symbol Conditions Min. Typ. Max. Unit
Operating voltage VDD - 1.6 3.0 5.5 V
Timekeeper voltage VCLK - 1.5 3.0 5.5 V
Operating temperature TOPR - -40 +25 +125 °C

Frequency characteristics

Item Symbol Conditions Rating Unit
Frequency stability Δ f/f Ta=+25°C VDD=3.0V 5±23 *1 ×10-6
Oscillation start up time tSTA Ta=+25°C VDD=1.6V 1.5 Max. s
Ta = -40°C to +125°C VDD=3.0V 3.0 Max. s

*1 ) ;Equivalent to ±1 minutes of monthly deviation.

Current consumption under backup mode.

Item Symbol Conditions Min. Typ. Max. Unit
Standby current. lBK fSCL = 0 Hz
VDD = 5 V
+125°C   1.0 2.0 µA
-40 to +85°C   0.6 1.2
fSCL = 0 Hz
VDD = 3 V
+125°C   0.8 1.6 µA
-40 to +85°C   0.5 1.0


Pin function

Terminal Directions Functions
CE Input Chip enabled input.
CLK Input Serial clock input.
Dl Input Data input.
DO Output Data 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.
/INT Output Interrupts output by Alarm and Timer events. (Open drain output)

Terminal connection / External dimensions

Terminal connection External dimensions

(Unit: mm)

The metal case inside of the molding compound may be exposed on the top or bottom of this product.
This purely cosmetic and does not have any effect on quality, reliability or electrical specs.

Footprint (Recommended)


(Unit: mm)

To maintain stable operation, provide a 0.1uF by-pass capacitor
at a location as near as possible to the power source terminal of the crystal product (between Vcc - GND).

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