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RX8900CE:UA3

型号:

RX8900CE:UA3

品牌:

SEIKO[ SEIKO EPSON CORPORATION ]

页数:

2 页

PDF大小:

838 K

Real time clock module  
REAL TIME CLOCK MODULE (I2C-Bus)  
Built-in 32.768 kHz-DTCXO, High Stability  
and Power Switching  
Product Number (Please contact us)  
RX8900SA  
: X1B000292xxxx00  
RX8900CE UA : X1B000301000100  
RX8900CE UB : X1B000301000200  
RX8900CE UC : X1B000301000300  
CE  
RX 8900 SA CE  
/
Built in frequency adjusted 32.768 kHz crystal unit and DTCXO.  
Interface Type  
Interface voltage range  
: I2C-Bus interface (400kHz)  
: 2.5 V to 5.5 V  
Temp. compensated voltage range : 2.0 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, temp. sensor function.  
.Epson prepared Linux driver for development.  
RX8900CE  
(3.2 × 2.5 × 1.0 mm)  
RX8900SA  
(10.1 × 7.4 × 3.3 mm)  
Actual size  
RX8900SA  
RX8900CE  
(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.  
Block diagram  
Overview  
High Stability  
UA ± 3.4 x 10-6  
/
-40 ºC to +85 ºC  
( Equivalent to 9 seconds of month deviation )  
UB -40 ºC to +85 ºC  
± 5.0 x 10-6  
( Equivalent to 13 seconds of month deviation )  
UC -30 ºC to +70 ºC  
± 5.0 x 10-6  
V
DD  
V
DD  
Detector  
/
/
FOE  
( 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  
Available automatic battery backup switch-over function  
Charge from VDD to backup battery connected to VBAT is  
possible. VDD voltage drop(VDET3) detection and automatically  
switches to the backup battery.  
This circuit is optimal to backup with a secondary battery and  
a large capacitor.  
Timer function  
Timer period is adjustable in 1/4096 second from 4095 minutes.  
Alarm function  
Available dual-alarm, weekly and monthly.  
Temp. sensor function  
Battery backup connection example (1)  
Bus  
Interface  
V
BAT  
Register  
Control  
(System  
Control)  
Alarm  
Register  
SCL  
SDA  
R
C
Timer  
Register  
primary  
battery  
VBAT  
Interrupts  
Controller  
Battery backup connection example (2)  
Divider  
Clock  
and  
Calender  
FOUT  
/INT  
V
BAT  
DTCXO  
R
FOUT  
Controller  
C
EDLC  
or  
secondary  
battery  
Available readout temperature data from embedded temp  
sensor. (Bank.2_Add17h)  
GND  
Pin Function  
Terminal connection / External dimensions  
(Unit:mm)  
Signal Name  
I / O  
Function  
RX8900SA  
RX8900CE  
Use by the manufacture for testing.  
( Do not connect externally.)  
Serial clock input pin.  
The pin outputs the reference clock signal.  
( CMOS output )  
1. FOE  
2. VDD  
3. VBAT  
4. FOUT  
5. SCL  
10. /INT  
1. T1(CE)  
2. SCL  
14. N.C.  
13. SDA  
T1(CE)  
SCL  
input  
input  
9. GND  
3. FOUT  
4. N.C.  
12. T2(VPP  
)
8. T2(VPP)  
7. SDA  
FOUT  
Output  
11. GND  
Battery supply.  
2.5 ± 0.2  
5.0  
V
BAT  
DD  
-
This pin has charge capability to backup battery.  
Connected to a positive power supply  
The input pin for the FOUT output control.  
5.  
6.  
V
BAT  
DD  
10.  
/ INT  
6. T1(CE)  
V
-
V
9. N.C.  
8. N.C.  
FOE  
/ INT  
GND  
input  
7.4  
±
0.2  
7. FOE  
Output Interrupt output (N-ch. open drain).  
-
Connected to a ground  
SOP 14 pin  
Use by the manufacture for testing.  
( Do not connect externally.)  
Data input and output pin.  
T2(VPP  
SDA  
)
-
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.  
I/O  
Specifications (characteristics)  
Refer to application manual for details.  
Electrical Characteristics  
32.768 kHz-DTCXO Frequency temperature characteristics (Example)  
Symb  
ol  
Item  
Conditions  
Min.  
Typ.  
Max.  
Unit  
Frequency temperature characteristics  
Operating voltage  
V
DD  
TEM  
CLK  
OPR  
2.5  
2.0  
1.6  
3.0  
3.0  
3.0  
5.5  
5.5  
5.5  
V
V
Interface voltage  
Temp. compensated voltage  
Internal clock  
10  
5
Temp. compensated Voltage  
Clock supply voltage  
Operating temperature  
V
V
V
32.768 kHz DTCXO  
1
T
No condensation  
ºC  
0
-40  
+25 +85  
2
UA  
UB  
Ta = -40 ºC to +85 ºC  
Ta = -40 ºC to +85 ºC  
-5  
±3.4  
f / f  
× 10-6  
Stability  
3
-10  
-15  
-20  
-25  
-30  
±5.0  
0.72  
UC  
Ta = -30 ºC to +70 ºC  
fSCL=0Hz, /INT=VDD  
FOE =GND  
DD=VBAT  
FOUT: OFF  
Temp. Compensation  
interval 2.0 s.  
,
Tuning fork X'tal  
Current consumption (1)  
Current consumption (2)  
I
I
DD  
DD  
1
2
V
DD = 5V  
DD = 3V  
-
-
1.5  
1.4  
V
µA  
V
0.70  
-45 -35 -25 -15  
-5  
5
15  
25  
35  
45  
55  
65  
75  
85  
1 )  
Temperature (ºC)  
Please contact us about +85 °C < TOPR  
2 )  
3 )  
Equivalent to 9 seconds of month deviation.  
Equivalent to 13 seconds of month 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 data, circuitry, software, usage, etc. written in this material is intended for reference only. Seiko Epson  
does not assume any liability for the occurrence of customer damage or 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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