Real time clock module
REAL TIME CLOCK MODULE (I2C-Bus)
Low current consumption
Product Number (Please contact us)
RX-8571SA : X1B000072xxxx00
RX-8571NB : X1B000062xxxx00
RX-8571LC : X1B000052xxxx00
RX - 8571SA/NB/LC
Built-in frequency adjusted 32.768kHz crystal unit.
Interface Type
Operating voltage range
: I2C-Bus Interface(400kHz)
: 1.6V to5.5V
Wide Timekeeper voltage range : 1.3Vto5.5V
Low backup current
: 220nA/3V(Typ.)
32.768 kHz frequency output function : C-MOS output With Control Pin
Actual size
RX-8571SA
User RAM
: 128 bit
The various functions include full calendar, alarm, timer,etc.
(Long-running timer : 65535 hours)
RX-8571NB
RX-8571LC
* The I2C-Bus is a trademark of NXP Semiconductors
Block diagram
Overview
( 32.768 kHz )
32.768 kHz frequency output function
FOE pin enable output on/off control.
Output frequency can be selected
as 32.768 kHz, 1024 Hz, 1 Hz.
XG
XD
OSC
DIVIDER
CLOCK
and
CALENDAR
FOE
FOUT
CONTROLLER
FOUT
Timer Function
TIMER REGISTER
ALARM REGISTER
Timer function can be set up between
1/4096 second and 65535 hours.
Timing period are 1 h, 1 min, 64 Hz, 4096 Hz.
It is recorded automatically to TF-bit at the time of
event occurs, and possible to output with /IRQ pin
output.
INTERRUPTS
CONTROLLER
/ IRQ
CONTROL
REGISTER
/BM
and
INTERFACE
CIRCUIT
DAS
SDA
SCL
Alarm function
SYSTEM
Alarm function can be set to day of week,
day, hour, or minute.
CONTROLLER
It is recorded automatically to AF-bit at the time of
event occurs, and possible to output with /IRQ pin
output.
USER REGISTER
128 bit (16 word x 8 bit)
Built-in RAM
128 bit (16 word x 8 bit)
Terminal connection/External dimensions
(Unit:mm)
RX8571LC
RX8571NB
RX8571SA
1. FOE
2. /BM
3. (GND)
4. SDA
5. SCL
6. DAS
7. GND
8. N.C.
9. FOUT
10. /IRQ
DD
22. N.C.
1. GND
2. N.C.
3. DAS
4. SCL
5. SDA
6. /BM
7. FOE
14. FOUT
13. N.C.
12. N.C.
11. N.C.
1. FOE
2. /BM
3. SDA
4. SCL
5. DAS
6. GND
12. VDD
11. N.C.
10. N.C.
9. N.C.
8. /IRQ
7. FOUT
21. N.C.
20. N.C.
19. N.C.
18. N.C.
17. N.C.
16. N.C.
15. N.C.
14. N.C.
5.0
2.4
4.8
10.
/IRQ
1.30.1
9. N.C.
8. VDD
13.
12.
0.2
7.4
2.8
5.00.2
11.
V
SOP - 14 pin
VSOJ12pin
SON22 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.
*Stop using the glue
Any glue must never use it after soldering LC-package to a circuit board.This product has glass on the back side of a package.When glue invasions between circuit board side
and glass side, then glass cracks by thermal expansion of glue.In this case a crystal oscillation stops.Consider glue abolition or glue do not touch to LC-package
Specifications (characteristics)
Refer to application manual for details.
Current consumption characteristics
Recommended Operating Conditions
Item
Symbol
Conditions
Min.
Typ.
Max.
Unit
Item
Symbol
Conditions
Min. Typ. Max. Unit
Power voltage
Clock voltage
Operating
VDD
VCLK
1.6
1.3
3.0
3.0
5.5
5.5
V
V
LC
type
FOE=/BM=”L”
-
-
220 400
200 400
FOUT=OFF
/IRQ=OFF
VDD =3.0V
Ta= +25C
TOPR
-40
+25
+85
C
temperature
nA
nA
SA/NB
type
Frequency characteristics
Current
Consumption
IDD
Item
Symbol
Conditions
Rating
Unit
FOE=/BM=”L”
FOUT=OFF
/IRQ=OFF
VDD =3.0V
Frequency
tolerance
Ta=+25C
VDD=3.0V
6
f/f
10
B: 523
-
-
-
550
Ta=+25C
VDD=1.6V
Oscillation
start up time
tSTA
1 Max.
s
Ta= -40Cto+85C
Please ask for tighter tolerance.( Equivalent to 1 minute of monthly deviation )