Real time clock module
Actual size
Block diagram
•High Stability
•UA ± 3.4 x 10-6 / -40 ºC to +85 ºC
( Equivalent to ±9 seconds of month deviation )
•UB ± 5.0 x 10-6 / -40 ºC to +85 ºC
( Equivalent to ±13 seconds of month deviation )
•UC ± 5.0 x 10-6 / -30 ºC to +70 ºC
•AA (+5 ± 5.0) x 10-6 / +25 ºC
•High Resolution: 1/100s Time register with capture buffer
• 32.768 kHz frequency output function
• FOUT pin output (C-MOS output), CL=30 pF
• Output selectable: 32.768 kHz, 1024 Hz, 1 Hz
• The various interrupt
• Timer Function can be set between 1/ 4096 second and
4095 minutes.
• Alarm Function can be set to day of week, day, hour, or minute.
• EVIN input.
• Time synchronize function with 1PPS signal input
• Register compatibility: upper compatible with RX-8801.
*It is possible to use it by the terminal connection as
32.768 kHz-DTCXO.
Pin Function
Terminal connection/External dimensions
(Unit:mm)
RX8803SA
1.
T1(CE)
14.
N.C.
2.
SCL
13.
SDA
3.
FOUT
12.
T2(VPP)
4.
N.C.
11.
GND
5.
TEST
10.
/INT
6.
VDD
9.
EVIN
7.
FOE
10.1 0.2
5.0
7.40.2
3.20.1
1.27
8.
N.C.
SOP14 pin
RX8803LC
1.
N.C.
12.
EVIN
2.
FOE
11.
/INT
3.
VDD
10.
GND
4.
FOUT
9.
T2(Vpp)
5.
SCL
8.
SDA
6.
T1(CE)
0.5
2.4
3.6
1.2Max.
2.8
7.
N.C.
VSOJ12pin
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.
REAL TIME CLOCK MODULE (I
2
C-Bus)
Built-in 32.768 kHz-DTCXO, High Stability
RX - 8803 SA/LC
•Built in frequency adjusted 32.768 kHz crystal unit and DTCXO.
•1/100s resolution Time register
•Interface Type : I2C-Bus interface (400kHz)
•Interface voltage range : 1.6 V to 5.5 V
•Temp. compensated voltage range : 2.2 V to 5.5 V
•Clock supply voltage range : 1.6 V to 5.5 V
•Selectable clock output (32.768 kHz, 1024 Hz, 1 Hz)
•The various functions include full calendar, alarm, timer, EVIN input.
.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 I2C-Bus is a trademark of NXP Semiconductors.
Signal Name
I / O
Function
T1(CE)
input
Use by the manufacture for testing.
( Do not connect externally.)
SCL
input
Serial clock input pin.
FOUT
Output
The pin outputs the reference clock signal.
( CMOS output )
TEST
input
Use by the manufacture for testing.
( Do not connect externally. RX-8803SA only.)
VDD
-
Connected to a positive power supply
FOE
input
The input pin for the FOUT output control.
EVIN
input
External event input.
/ INT
Output
Interrupt output (N-ch. open drain).
GND
-
Connected to a ground
T2(VPP)
-
Use by the manufacture for testing.
( Do not connect externally.)
SDA
I/O
Data input and output pin.
Electrical Characteristics
Item
Symbol
Conditions
Min.
Typ.
Max.
Unit
Operating voltage
VDD
Interface voltage
1.6
3.0
5.5
V
Temp. compensated Voltage
VTEM
Temp. compensated voltage
2.2
3.0
5.5
V
Clock supply voltage
VCLK
-
1.6
3.0
5.5
V
Operating temperature
TOPR
-
-40
+25
+85
ºC
Stability
f/f
UA
Ta= -40 ºC to +85 ºC
±3.41
10-6
UB
Ta=-40 ºC to +85 ºC
±5.02
UC
Ta= -30 ºC to +70 ºC
AA
Ta=+25 ºC
5 ±5.03
Current consumption (1)
IDD1
Backup Mode
FOE = GND,
/INT = VDD
FOUT output : OFF
VDD = 5V
-
0.75
3.4
A
Current consumption (2)
IDD2
VDD = 3V
-
0.75
2.1
1) Equivalent to ±9 seconds of month deviation. 2)Equivalent to ±13 seconds of month deviation.
3)Equivalent to ±13 seconds of month deviation. ( excluding offset )
Product Number (Please contact us)
RX-8803SA UB : X1B000151000100
RX-8803SA UA : X1B000151000200
RX-8803SA UC : X1B000151000300
RX-8803SA AA : X1B000151000400
RX-8803LC UA : X1B000142000100
RX-8803LC UB : X1B000142000200
RX-8803LC UC : X1B000142000300
RX-8803LC AA : X1B000142000400
RX-8803SA
RX-8803LC
32.768 kHz-DTCXO Frequency temperature characteristics (Example)
Frequency temperature characteristics
-30
-25
-20
-15
-10
-5
0
5
10
-45
-35
-25
-15
-5
5
15
25
35
45
55
65
75
85
Temperature (ºC)
Frequency tolerance ( ×10-6 )
Tuning fork X'tal
32.768 kHz DTCXO
32kHz
DTCXO
32.768 kHz
CLOCK
and
CALENDAR
TIMER
REGISTER
ALARM
REGISTER
FOUT
CONTROLLER
CONTROL
REGISTER
and
SYSTEM
CONTROLLER
DIVIDER
INTERRUPT
CONTROLLER
INTERFACE
CIRCUIT
FOUT
FOE
/ INT
SCL
SDA
EVIN
*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
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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.
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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 ).
Seiko Epson Corporation
Notice
• This material is subject to change without notice.
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ISO/TS16949 is the international standard that added the
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industry based on ISO9001.