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RX-8731LC:B3 PDF预览

RX-8731LC:B3

更新时间： 2024-11-12 14:44:31
品牌 Logo 应用领域
精工 - SEIKO 光电二极管外围集成电路
页数 文件大小 规格书
2页 254K
描述
REAL TIME CLOCK, PDSO12, ROHS COMPLIANT, VSOJ-12

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中文翻译

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RX-8731LC:B3 数据手册

 浏览型号RX-8731LC:B3的Datasheet PDF文件第2页 
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  
12

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