Datasheet

Actual size
Real time clock module
Real time clock moduleReal time clock module
Real time clock module
Block diagram
Overview
INTERRUPTS
CONTROLLER
ALARM REGISTER
/ IRQ1
BUS
INTERFACE
CIRCUIT
CONTROL
REGISTER
and
SYSTEM
CONTROLLER
DIVIDER
CLOCK
and
SDA
USER RAM 128 bit
SCL
CALENDR
TIMER REGISTER
ALARM,TIMER,FOUT
BUILT-IN XTAL
( 32.768 kHz )
/ IRQ2
OSC
TIMER, FOUT
•
••
• Interface Type
• I
2
C-Bus high-speed bus specifications. (400 kHz)
•
••
• Frequency output function
• It may select a CMOS or open drain output
• Output frequency can be selected as 32.768kHz, 1024Hz, 1Hz.
•
••
• Timer function
 Timer function can be set up between
1/4096 second and 65535 hours.
 Timing period are 1hour, 1min, 64Hz, 4096Hz.
 It is recorded automatic to TF-bit at the time of event occurrence,
and possible to output with /IRQ1 or /IRQ2 pin.
•
••
• Alarm function
 Alarm function can be set to day of week,
day, hour, and minute.
 It is recorded automatic to AF-bit at the time of event occurrence,
and possible to output with /IRQ1 pin.
•
••
• User RAM
 128 bit (8 bit x 16, SRAM)
Pin Function
Terminal connection
/
External dimensions
(
Unit
:mm
)
Signal Name Input / Output Function
SCL Input This is a shift clock input pin for serial data transmission.
SDA Input/Output This is the data input/output pin for serial data transfer.
/ IRQ1 Output
This pin outputs interrupt signals ("L" level) for alarm, timer, time update,
and 32.768kHz. This is an N-ch open-drain output.
/ IRQ2 Output
This pin outputs interrupt signals ("L" level) for timer and FOUT.
This is a C-MOS output.
V DD Supply This is a power-supply pin.
GND Supply This pin is connected to a ground.
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.
Specifications (characteristics)
∗
Refer to application manual for details.



Recommended Operating Conditions
Item Symbol Conditions Min. Typ. Max. Unit
Power voltage
V
DD
-
1.
6
3.0
5.5
V
Clock voltage V CLK - 1.1 3.0 5.5 V
Operating
temperature
T OPR - -40 +25 +85
°C


 Frequency characteristics
Item Symbol Conditions Rating Unit
Frequency
tolerance
∆ f / f
T a = +25
°
C
V DD = 3.0 V
B: 5 ± 23 * × 10
−
6
Oscillation
Start-up time
t STA
T a = +25
°
C
V DD = 1.6 V ∼ 5.5 V
1 Max. s
T a = -40
°
C to +85
°
C
V DD = 1.6V ∼ 5.5V
3 Max. s
*Equivalent to 1 minute of monthly deviation


 Current consumption characteristics
Ta = -40 °C to +85 °C
Item Symbol Conditions Min. Typ. Max. Unit
Current
Consumption
I BK
Input pins are "L"
fCLK = 0 Hz,
/IRQ1,2 = OFF
TSEL2=”1”
V DD
= 5 V
- - 350
nA
V DD
= 3 V
- 160 320
I 32k
fCLK = 0 Hz,
/IRQ1: 32.768 kHz ON,
/IRQ2: OFF
V DD
= 5 V
- 0.60 1.10
µA
V DD
= 3 V
- 0.52 0.90
REAL TIME CLOCK MODULE (I
2
C-Bus)
Low current consumption
RX8010 SJ
•Built in frequency adjusted 32.768 kHz crystal unit.
•Interface Type : I
2
C-Bus interface (400 kHz)
•Operating voltage range : 1.6 V to 5.5 V
•Wide voltage for time keeping. : 1.1 V to 5.5 V
•Low backup current : 160 nA / 3 V (Typ.)
•Frequency output function : C-MOS or Open-Drain output
•Built-in user RAM : 128 bit (8 bit x 16, SRAM)
•The various functions include full calendar, alarm, timer, etc.
•This product is conform to industrial standard SOP8 package,
and it can be mounted to the common land pattern.
Epson prepared Linux driver for development.
(http://www5.epsondevice.com/en/information/support/linux_rtc/)
The registered trademark Linux® is used pursuant to a sublicense from LMI(Linux Mark Institute)
The I
2
C-Bus is a trademark of NXP Semiconductors
Product Number (Please contact us)
RX8010SJ : X1B000242000100
SOP-8 pin
RX8010SJ
1.27
7
.0 ± 0.2
3.9 ± 0.1
6.0 ± 0.2
2.65 Max.
Unit: mm
1.N.C.
2.N.C.
3./IRQ2
4.GND
8.V DD
7./IRQ1
6.SCL
5.SDA