http://www.epsontoyocom.co.jp
Real time clock module
Real time clock moduleReal time clock module
Real time clock module
Epson Toyoc
Epson ToyocEpson Toyoc
Epson Toyocom
omom
om
Actual size
Block diagram
Overview
32kHz
DTCXO
32.768 kHz
CLOCK
and
CALENDAR
TIMER
RE GIST ER
ALAR M
RE GIST ER
FOUT
CONTROLLER
CONTROL
RE GIST ER
and
SYST EM
CONTROLLER
DIVIDER
INTERRUPT
CONTROLLER
INT ERFACE
CIR CUIT
FOUT
FOE
/ INT
CLK
DO
D I
CE
• High Stability
•UA
± 1.9 x 10
-6
/ 0 ºC to +40 ºC
( Equivalent to 5 seconds of month deviation )
± 3.4 x 10
-6
/ -40 ºC to +85 ºC
( Equivalent to 9 seconds of month deviation )
•UB
± 3.8 x 10
-6
/ 0 ºC to +50 ºC
( Equivalent to 10 seconds of month deviation )
± 5.0 x 10
-6
/ -40 ºC to +85 ºC
( Equivalent to 13 seconds of month deviation )
• 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 up between
1/ 4096 second and 255 minutes.
• Alarm Function can be set to day of week,
day, hour, or minute.
*It is possible to use it by the terminal connection as
32.768 kHz-DTCXO.
Pin Function
Terminal connection
/
External d imension
s
(
Unit:mm
RX
− 4801 SA
1. CE 14. DI
2. CLK 13. DO
3. FOUT 12. T2(V
PP
)
4. N.C. 11. GND
5. TEST 10. / INT
6. V
DD
9. N.C.
7. FOE
10.1
± 0.2
5.0
7. 4
± 0. 2
3.2
±
0.1
1.27
8. N.C.
SOP − 14 p in
RX−4801JE
1. / INT 20. N.C.
2. GND 19. N.C.
3. T2( Vpp ) 18. N.C.
4. DO 17. N.C.
5. DI 16. N.C.
6. CE 15. N.C.
7. CLK 14. N.C.
8. FOUT 13. N.C.
9. N.C. 12. N.C.
10. FOE
7.0
± 0. 3
5.4
6.0
±
0.2
1.5
Max.
0.6 5
11. V
DD
VS OJ − 20 pin
Meta l may be exposed on the to p or bottom of this product.
This w ill not af f ect any quality, reliab ility or el ec tric al s pec .
S
p
ecifications
(
characteristics
)
∗ Refer to a
pp
lication manual for details.
Built-in 32.768 kHz-DTCXO, High Stability
SERIAL-INTERFACE REAL TIME CLOCK MODULE
RX
-
4801
SA
/
JE
•Built in frequency adjusted 32.768 kHz crystal unit and DTCXO.
•Interface Type : 4-wire serial interface
•Interface voltage range : 1.6 V to 5.5 V
•Temp.compensated voltage range: 2.2 V to 5.5 V
•Wide Timekeeper voltage range : 1.6 V to 5.5 V
•32.768 kHz frequency output function : C-MOS output With Control Pin
•The various functions include full calendar, alarm, timer.
32.768 kHz-DTCXO Frequency temperature characteristics (Exam ple)
Fr equency tempera ture charact eristics
-30
-25
-20
-15
-10
-5
0
5
10
-45
-35
-25
-1 5
-5
5
15
25
35
45
55
65
75
85
Temperature (ºC)
Frequency tole ran ce ( ×10
-6
)
T uning fork X'tal
32.768 kHz DTCXO
Signal Name I / O Function
/ INT Output The open drain output for interrupt.
GND - Connected to a ground
T2(V
PP
) -
* Use by the manufacture for testing.
( Do not connect externally.)
DO Output The data output pin for serial data transfer.
D I input The data input pin for serial data transfer.
CE input The chip enable input pin.
CLK input The shift clock input pin for serial data transfer.
FOUT Output
The pin outputs the reference clock signal.
( CMOS output )
FOE input The input pin for the FOUT output control.
V
DD
- Connected to a positive power supply
Electrical Characteristics
Item Symbol Condition Min. Typ. Ma x. Unit
Interface voltage V
DD
Interface voltage 1.6 3.0 5.5 V
Temp. compensated
Voltage V
TEM
Temp. compensated voltage 2.2 3.0 5.5 V
Clock voltage V
CLK
- 1.6 3.0 5.5 V
Operating temperature T
OPR
-
−
40 +25 +85 ºC
Ta
=
0 ºC to +40 ºC ±1.9
∗
1
UA
Ta
=
-40 ºC to +85 ºC ±3.4
∗
2
Ta
=
0 ºC to +50 ºC ±3.8
∗
3
Stability
∆
f
/
f
UB
Ta
=
-40 ºC to +85 ºC ±5.0
∗
4
×
10
−
6
Current consumption (1)
I
BK1
V
DD
= 5V - 1.2 3.4
Current consumption (2) I
BK2
Backup Mode
FOE = GND,
/INT = V
DD
FOUT output : OFF V
DD
= 3V - 0.8 2.8
µ
A
∗1 ) Equivalent to 5 seconds of month deviation. ∗2 ) Equivalent to 9 seconds of month deviation.
∗3 ) Equivalent to 10 seconds of month deviation. ∗4 ) Equivalent to 13 seconds of month deviation.
Product Number (Please contact us)
RX-4801SA : X1B000021xxxx00
RX-4801JE : X1B000041xxxx00
“QMEMS” EPSON TOYOCOM
In order to meet customer needs in a rapidly advancing digital,
broadband and ubiquitous society, we are committed to offering products
that are one step ahead of the market and a rank above the rest in quality.
To achieve our goals, we follow a “3D (three device) strategy” designed to
drive both horizontal and vertical growth. We will to grow our three device
categories of “Timing Devices”, ”Sensing Devices” and “Optical Devices”,
and expand vertical growth through a combination of products from these
categories.
A Quartz MEMS is any high added value quartz device that exploits the
characteristics of quartz crystal material but that is produced using MEMS
(micro-electro-mechanical system) processing technology.
Market needs are advancing faster than previously imagined toward
smaller, more stable crystal products, but we will stay ahead of the curve
by rolling out products that exceed market speed and quality
requirements. We want to further accelerate the 3D strateg y by QMEMS.
Quartz devices have become crucial in the network environment where
products are increasingly intended for broadband, ubiquitous applications
and where various types of terminals can transfer information almost
immediately via LAN and WAN on a global scale. Epson Toyocom
Corporation addresses every single aspect within a network environment.
The new corporation offers “Digital Convergence” solutions to problems
arising with products for consumer use, such as, core network systems
and automoti ve systems.
PROMOTION OF ENVIRONMENTAL MANAGEMENT SYSTEM
CONFORMING TO INTERNATIONAL STANDARDS
At Epson Toyocom, 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.
WORKING FOR HIGH QUALITY
In order provide high quality and reliable products and services than meet customer needs,
Epson Toyocom made early efforts towards obtaining ISO9000 series certification and has acquired ISO9001 for all business establishme nts i n Japa n
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 se aling glass, high me lting te mperature type solde r or othe r.)
►The products have been designed for high reliability applications such as Automotive.
Notice
●This material is subject to c hange without notice.
●Any part of this material may not be reproduced or duplicated in any form or any means without the written permission of Epson To y o c o m .
●The information, applied circuitry, programming, usage, etc., written in this material is intended for reference only. Epson Toyocom does not
assume any liability for the occurrence of infringing on any patent or copyright of a third party. This material does not authorize the licensing for
any patent or intellectual copyrights.
●Any product described in this material may contain technology or the subject relating to strategic products under the control of the Foreign
Exchange and Foreign Trade Law of Japan and may require an export license from the Ministry of International Trade and Industry or other
approval from another government agency.
●You are requested not to use the products (and any technical information furnished, if any) for the development and/or manufacture of 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 Epson Toyocom in advance.
/ Space equipment (artificial satellites, rockets, etc.) / Transportation vehicles and related (automobiles, aircraft, trains, vessels, etc.)
/ Medical instruments to sustain life / Submarine transmitters / Power stations and related / Fire work equipment and security equipment
/ traffic control equipment / and others requiring equivalent reliability.
● In this new crystal master for Epson Toyocom, product codes and markings will remain as previously identified prior to the merger.
Due to the on-going strategy of gradual unification of part numbers, please review product codes and markings, as they will change during the
course of the coming months.
We apologize for the inconvenience, but we will eventually have a unified part numbering system for Epson Toyocom that will be user friendly.
QS-9000 is an enhanced standard for quality assurance systems
formulated by leading U.S. automobile manufacturers based on the
international ISO 9000 series.
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
ISO/TS 16949 is a global standard based on QS-9000, a severe standard
corresponding to the requirements from the automobile industry.