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RX-8731LC:B:PURESN

型号:

RX-8731LC:B:PURESN

品牌:

SEIKO[ SEIKO EPSON CORPORATION ]

页数:

2 页

PDF大小:

254 K

Real time clock module  
Product Number (Please contact us)  
RX-8731LC : Q418731C2000100  
REAL TIME CLOCK MODULE (I2C-Bus)  
Built-in EEPROM and Unique ID-ROM  
RX - 8731LC  
Built in frequency adjusted 32.768 kHz crystal unit.  
Interface Type  
: I2C-Bus interface (400 kHz)  
: 1.7Vto5.5V  
Operating voltage range  
Wide Timekeeper voltage range : 1.3Vto5.5V  
Low backup current  
: 0.35A/3V(Typ.)  
Actual size  
32.768 kHz frequency output function : C-MOS output With Control Pin  
The various functions include full calendar, alarm, timer.  
* The I2C-Bus is a trademark of NXP Semiconductors  
Block diagram  
Overview  
32.768 kHz  
Built in EEPROM and ID-ROM  
• Built in 10 Byte ( 80 bit) EEPROM  
• Built in 6 Byte ( 48 bit ) ID-ROM  
DIVIDER  
OSC  
CLOCK  
and  
CALENDAR  
FOE  
Programmable I/O ports  
FOUT  
CONTROLLER  
• 4 Programmable I/O ports  
FOUT  
TIMER REGISTER  
ALARM REGISTER  
INTERRUPTS  
CONTROLLER  
 Interface Type  
/ IRQ  
• I2C-Bus high-speed bus specifications. (400 kHz)  
4
32.768 kHz frequency output function  
• FOUT pin output (C-MOS output), CL=30 pF  
• FOE pin enables output on/off control.  
• Output frequency is selectable.  
I/O Port  
P00 – P03  
CONTROL  
REGISTER  
A 0  
I2C-Bus  
and  
< 32.768kHz, 1024 Hz, 1 Hz >  
INTERFACE  
CIRCUIT  
SDA  
SYSTEM  
CONTROLLER  
The various interrupt function  
• Alarm interrupt function  
SCL  
• Timer interrupt function  
• Update interrupt function  
EEPROM  
10 Byte ( 80 bit )  
ID-ROM  
6 Byte ( 48 bit )  
Pin Function  
Terminal connection/External dimensions  
(Unit:mm)  
RX 8731 LC  
  
Signal Name Input / Output  
Function  
SCL  
SDA  
Input  
Serial Clock input pin.  
1. FOE  
2. P00  
3. SDA  
4. SCL  
5. A 0  
12. VDD  
11. P01  
10. P02  
9. P03  
Bi-directional  
Data input and output pin.  
A 0  
Input  
Device address A0 input pin.  
FOUT pin is 32.768 kHz clock output pin ( C-MOS ) that output control is  
possible.  
FOE pin control the frequency output from FOUT pin with FSEL1-bit and  
FSEL0-bit.  
FOUT  
Output  
2.4  
2.8  
FOE  
Input  
8. / IRQ  
7. FOUT  
/ IRQ  
Output  
Interrupt output pin. ( N-ch open drain )  
Programmable I/O ports.  
6. GND  
P00  
P01  
P02  
P03  
Bi-directional  
VSOJ 12pin  
  
*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  
VDD  
Connected to a positive power supply.  
Connected to a ground.  
GND  
Specifications (characteristics)  
Refer to application manual for details.  
Recommended Operating Conditions  
Ta=-40Cto+85C  
Current consumption characteristics  
Item  
Symbol  
Conditions  
Min.  
Typ.  
Max.  
Unit  
Item  
Symbol  
Conditions  
Min.  
-
Typ.  
0.45  
Max.  
1.5  
Unit  
µA  
Power voltage  
Clock voltage  
Operating  
VDD  
VCLK  
1.7  
1.3  
3.0  
3.0  
5.5  
5.5  
V
V
VDD  
fSCL=0 Hz  
=5V  
TOPR  
-40  
+25  
+85  
C  
/ IRQ = OFF  
temperature  
IBK  
FOUT: output OFF  
(Hi-z)  
VDD  
VDD  
VDD  
-
-
-
0.35  
8.0  
1.4  
Frequency characteristics  
=3V  
=5V  
=3V  
Current  
Consumption  
Item  
Symbol  
Conditions  
Rating  
Unit  
fSCL=0 Hz  
/ IRQ = OFF  
16.0  
10.0  
Ta=+25C  
Frequency  
tolerance  
6
f/f  
B: 523*  
1Max.  
10  
I32k  
µA  
VDD=3.0V  
Ta=+25C  
VDD=1.6V  
Ta=-40Cto+85C  
VDD=1.6V  
FOUT:  
32.768kHz output  
CL=30pF  
5.0  
s
s
Oscillation  
Start-up time  
tSTA  
3Max.  
*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  
ISO 14000 is an international standard for environmental  
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.  
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,  
ISO/TS16949 is the international standard that added the  
sector-specific supplemental requirements for automotive  
industry based on ISO9001.  
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 ).  
Notice  
This material is subject to change without notice.  
Any part of this material may not be reproduced or duplicated in any form or any means without the written permission of Seiko Epson.  
The information about applied circuitry, software, usage, etc. written in this material is intended for reference only. Seiko Epson 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.  
When exporting the products or technology described in this material, you should comply with the applicable export control laws and  
regulations and follow the procedures required by such laws and regulations.  
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 Seiko Epson 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.  
All brands or product names mentioned herein are trademarks and/or registered trademarks of their respective.  
Seiko Epson Corporation  
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