Real time clock module
REAL TIME CLOCK MODULE (I
2
C-Bus)
Low current consumption
Product Number (Please contact us)
RX-8571SA : X1B000072xxxx00
RX-8571NB : X1B000062xxxx00
RX-8571LC : X1B000052xxxx00
RX - 8571
SA
/
NB
/
LC
Built-in
frequency adjusted 32.768kHz crystal unit.
Interface
Type
:
I
2
C-Bus Interface(400kHz)
Operating
voltage range
:
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
User
RAM
:
128 bit
The
various functions include full calendar, alarm, timer,etc.
(Long-running timer : 65535 hours)
*
The I
2
C-Bus is a trademark of NXP Semiconductors
Actual size
RX-8571SA
RX-8571NB
RX-8571LC
Block diagram
( 32.768 kHz )
Overview
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.
Timer
Function
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.
Alarm
function
Alarm function can be set to day of week,
day, hour, or minute.
It is recorded automatically to AF-bit at the time of
event occurs, and possible to output with /IRQ pin
output.
Built-in RAM
128 bit (16 word x 8 bit)
XD
OSC
XG
DIVIDER
FOUT
CONTROLLER
CLOCK
and
CALENDAR
FOE
FOUT
TIMER REGISTER
/ IRQ
INTERRUPTS
CONTROLLER
ALARM REGISTER
/BM
DAS
SDA
SCL
INTERFACE
CIRCUIT
CONTROL
REGISTER
and
SYSTEM
CONTROLLER
USER REGISTER
128 bit (16 word x 8 bit)
Terminal connection/External dimensions
RX8571SA
1.
2.
3.
4.
5.
6.
7.
GND
N.C.
DAS
SCL
5.0
1.27
(Unit:mm)
RX8571NB
0.5
RX8571LC
22.
21.
6.3
Max.
14.
10.1
0.2
FOUT
N.C.
N.C.
N.C.
/IRQ
N.C.
V
DD
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
FOE
/BM
(GND)
SDA
SCL
DAS
GND
N.C.
FOUT
/IRQ
V
DD
SON22
pin
5.0
0.2
4.8
1.3
0.1
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
4.
5.
6.
SCL
DAS
GND
2.8
2.4
0.5
N.C.
1.
2.
3.
FOE
/BM
SDA
12.
3.6
V
DD
N.C.
N.C.
N.C.
/IRQ
FOUT
13.
12.
11.
10.
20.
19.
18.
17.
16.
15.
14.
13.
12.
11.
10.
9.
SDA
3.2
0.1
/BM
FOE
7.4
0.2
9.
8.
1.2
Max.
8.
7.
SOP - 14 pin
VSOJ12pin
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)
Recommended Operating Conditions
Item
Power voltage
Clock voltage
Operating
temperature
Refer to application manual for details.
Current consumption characteristics
Typ.
3.0
3.0
+25
Max.
5.5
5.5
+85
Unit
V
V
C
Item
Symbol
Conditions
FOE=/BM=”L”
FOUT=OFF
/IRQ=OFF
V
DD
=3.0V
Ta= +25C
Current
Consumption
LC
type
SA/NB
type
Symbol
V
DD
V
CLK
T
OPR
Conditions
-
-
-
Min.
1.6
1.3
-40
Min.
-
Typ.
220
Max.
400
Unit
nA
-
200
400
Frequency characteristics
Item
Frequency
tolerance
Oscillation
start up time
Symbol
f/f
t
STA
Conditions
T
a
=+25C
V
DD
=3.0V
T
a
=+25C
V
DD
=1.6V
Rating
B:
523
1 Max.
Unit
10
6
s
I
DD
FOE=/BM=”L”
FOUT=OFF
/IRQ=OFF
V
DD
=3.0V
Ta= -40Cto+85C
-
-
-
550
nA
Please
ask for tighter tolerance.( Equivalent to 1 minute of monthly deviation )
PROMOTION OF ENVIRONMENTAL MANAGEMENT SYSTEM
CONFORMING TO INTERNATIONAL STANDARDS
At Seiko Epson, all environmental initiatives operate under the
Plan-Do-Check-Action (PDCA) cycle designed to achieve continuous
improvements. The environmental management system (EMS)
operates under the ISO 14001 environmental management standard.
All of our major manufacturing and non-manufacturing sites, in
Japan and overseas, completed the acquisition of ISO 14001
certification.
ISO 14000 is an international standard for environmental
management that was established by the International
Standards Organization in 1996 against the background of
growing concern regarding global warming, destruction of
the ozone layer, and global deforestation.
WORKING FOR HIGH QUALITY
In order provide high quality and reliable products and services
than meet customer needs,
Seiko Epson made early efforts towards obtaining ISO9000 series
certification and has acquired ISO9001 for all business
establishments in Japan and abroad. We have also acquired ISO/TS
16949 certification that is requested strongly by major automotive
manufacturers as standard.
►Explanation
of the mark that are using it for the catalog
►Pb
free.
►Complies
with EU RoHS directive.
*About the products without the Pb-free mark.
Contains Pb in products exempted by EU RoHS directive.
(Contains Pb in sealing glass, high melting temperature type solder or other.)
►Designed
for automotive applications such as Car Multimedia, Body Electronics, Remote Keyless Entry etc.
►Designed
for automotive applications related to driving safety (Engine Control Unit, Air Bag, ESC etc ).
ISO/TS16949 is the international standard that added the
sector-specific supplemental requirements for automotive
industry based on ISO9001.
Notice
This material is subject to change without notice.
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The information about applied circuitry, software, usage, etc. written in this material is intended for reference only. Seiko Epson does
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licensing for any patent or intellectual copyrights.
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weapon of mass destruction or for other military purposes. You are also requested that you would not make the products available to
any third party who may use the products for such prohibited purposes.
These products are intended for general use in electronic equipment. When using them in specific applications that require extremely
high reliability, such as the applications stated below, you must obtain permission from Seiko Epson in advance.
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