Real time clock module
REAL TIME CLOCK MODULE (I2C-Bus)
Low current consumption
Product Number (Please contact us)
RX8010SJ : X1B000242xxxx00
RX8010SJ
Built in frequency adjusted 32.768 kHz crystal unit.
Interface Type
: I2C-Bus interface (400 kHz)
: 1.6Vto5.5V
Operating voltage range
Wide Timekeeper voltage range : 1.1Vto5.5V
Low backup current
: 160nA/3V(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.
Actual size
Epson is prepared Linux driver for this product.
(http://www5.epsondevice.com/en/quartz/tech/linux_for_rtc/index.html)
The registered trademark Linux® is used pursuant to a sublicense from LMI(Linux Mark Institute)
The I2C-Bus is a trademark of NXP Semiconductors
Block diagram
Overview
BUILT-IN XTAL
Interface Type
• I2C-Bus high-speed bus specifications. (400 kHz)
( 32.768 kHz )
CLOCK
and
OSC
DIVIDER
CALENDR
Frequency output function
• It may select a CMOS or open drain output
• Output frequency can be selected as 32.768kHz, 1024Hz, 1Hz.
TIMER REGISTER
ALARM REGISTER
Timer function
ALARM,TIMER,FOUT
TIMER, FOUT
INTERRUPTS
CONTROLLER
/ IRQ1
/ IRQ2
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.
CONTROL
REGISTER
BUS
INTERFACE
CIRCUIT
and
SCL
SDA
Alarm function
Alarm function can be set to day of week,
day, hour, and minute.
SYSTEM
CONTROLLER
It is recorded automatic to AF-bit at the time of event occurrence,
and possible to output with /IRQ1 pin.
User RAM
USER RAM 128 bit
128 bit (8 bit x 16, SRAM)
Pin Function
Terminal connection/External dimensions
(Unit:mm)
RX8010SJ
8.VDD
1.N.C.
2.N.C.
3./IRQ2
Signal Name Input / Output
Function
SCL
SDA
Input
This is a shift clock input pin for serial data transmission.
This is the data input/output pin for serial data transfer.
7./IRQ1
6.SCL
5.SDA
Input/Output
This pin outputs interrupt signals ("L" level) for alarm, timer, time update,
and 32.768kHz. This is an N-ch open-drain output.
/ IRQ1
/ IRQ2
Output
Output
4.GND
3.9 0.1
This pin outputs interrupt signals ("L" level) for timer and FOUT.
This is a C-MOS output.
2.65 Max.
VDD
Supply
Supply
This is a power-supply pin.
GND
This pin is connected to a ground.
6.0 0.2
Unit: mm
SOP-8 pin
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
Ta=-40Cto+85C
Current consumption characteristics
Item
Symbol
Conditions
Min.
Typ.
Max.
Unit
Item
Symbol
Conditions
Min.
-
Typ.
-
Max.
350
Unit
nA
Power voltage
Clock voltage
Operating
VDD
VCLK
1.6
1.1
3.0
3.0
5.5
5.5
V
V
VDD
Input pins are "L"
=5V
=3V
=5V
=3V
TOPR
-40
+25
+85
C
fCLK = 0 Hz,
/IRQ1,2 = OFF
TSEL2=”1”
temperature
IBK
VDD
VDD
VDD
-
-
-
160 320
0.60 1.10
0.52 0.90
Frequency characteristics
Current
Consumption
Item
Symbol
Conditions
Rating
Unit
Ta=+25C
VDD=3.0V
Ta=+25C
Frequency
tolerance
6
fCLK = 0 Hz,
/IRQ1: 32.768kHz ON,
/IRQ2: OFF
f/f
B: 523*
1Max.
10
µA
I32k
s
s
Oscillation
Start-up time
VDD=1.6V5.5V
Ta=-40Cto+85C
VDD= 1.6V 5.5V
tSTA
3Max.
*Equivalent to 1 minute of monthly deviation
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