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RA-8565SA (for Automotive I2C-Bus Interface Real Time Clock Module)
- Interface Type
I2C-Bus Interface(400kHz)
- Wide operating voltage range
1.8V to 5.5V
- Wide Timekeeper voltage range
1.7V to 5.5VTa=-40°C to +125°C
- Extended operating temperature range
-40°C to +125°C
- 32.768kHz frequency output function
N-ch Open drain outputWith Control Pin
- The various functions include full calendar, alarm, timer,etc.
- Applications : Car audio, Car navigation system, Clock, ECU sub clock
- AEC-Q200 compliant
- Built in frequency adjusted 32.768kHz crystal unit.
Application Manual
(ETM22E-01) (370kB)
Design Support Data Download
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.
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 |
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
(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).