RX8010-SJ Datasheet, PDF (1/2 Pages) Epson Company – REAL TIME CLOCK MODULE (I2C-Bus)

Real time clock module
REAL TIME CLOCK MODULE (I²C-Bus)
Low current consumption
RX8010SJ
Built in frequency adjusted 32.768 kHz crystal unit.
Interface Type
: I²C-Bus interface (400 kHz)
Operating voltage range
: 1.6Vto5.5V
Wide Timekeeper voltage range : 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 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
Actual size
Block diagram
Overview
Product Number (Please contact us)
RX8010SJ : X1B000242xxxx00
BUILT-IN XTAL
( 32.768 kHz )
OSC
DIVIDER
/ IRQ1
/ IRQ2
ALARM,TIMER,FOUT
TIMER, FOUT
INTERRUPTS
CONTROLLER
SCL
SDA
BUS
INTERFACE
CIRCUIT
CLOCK
and
CALENDR
TIMER REGISTER
ALARM REGISTER
CONTROL
REGISTER
and
SYSTEM
CONTROLLER
USER RAM 128 bit
 Interface Type
• I²C-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)
RX8010SJ
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
/ IRQ2
Output
Output
This pin outputs interrupt signals ("L" level) for alarm, timer, time update,
and 32.768kHz. This is an N-ch open-drain output.
This pin outputs interrupt signals ("L" level) for timer and FOUT. 
This is a C-MOS output.
VDD
Supply
This is a power-supply pin.
GND
Supply
This pin is connected to a ground.
1.N.C.
2.N.C.
3./IRQ2
4.GND
3.9  0.1
2.65 Max.
8.VDD
7./IRQ1
6.SCL
5.SDA
6.0  0.2
SOP-8 pin
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.
Specifications (characteristics)
 Recommended Operating Conditions
Item
Symbol Conditions
Min.
Power voltage
VDD
-
1.6
Clock voltage
VCLK
-
1.1
Operating
temperature
TOPR
-
-40
 Frequency characteristics
Item
Symbol
Conditions
Frequency
tolerance
f/f
Ta=+25C
VDD=3.0V
Ta=+25C
Oscillation
Start-up time
tSTA
VDD=1.6V5.5V
Ta=-40Cto+85C
VDD= 1.6V  5.5V
*Equivalent to 1 minute of monthly deviation
Typ. Max.
3.0 5.5
3.0 5.5
+25 +85
Rating
B: 523*
1Max.
3Max.
Unit
V
V
C
Unit
10^6
s
s
 Refer to application manual for details.
 Current consumption characteristics
Ta=-40Cto+85C
Item
Symbol
Conditions
Min. Typ. Max. Unit
Current
Input pins are "L"
VDD
=5V
-
IBK
fCLK = 0 Hz,
/IRQ1,2 = OFF
- 350
nA
TSEL2=”1”
VDD
=3V
-
160 320
Consumption
fCLK = 0 Hz,
VDD
=5V
-
0.60 1.10
I32k /IRQ1: 32.768kHz ON,
µA
/IRQ2: OFF
VDD
=3V
-
0.52 0.90