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RX-4574LC:B:ROHS PDF预览

RX-4574LC:B:ROHS

更新时间： 2023-04-15 00:00:00
品牌 Logo 应用领域
精工 - SEIKO /
页数 文件大小 规格书
1页 188K
描述
MEMORY REFRESH TIMER

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中文翻译

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RX-4574LC:B:ROHS 数据手册

  
Real time clock module  
Epson Toyocom  
Small size, low profile model package  
SERIAL-INTERFACE REAL TIME CLOCK MODULE  
RX - 4574 LC  
•
•
•
•
•
•
•
Built in frequency adjusted 32.768 kHz crystal unit.  
Interface Type  
:
:
:
:
3-wire serial interface  
1.6 V to 5.5 V  
1.3 V to 5.5 V  
Operating voltage range  
Wide Timekeeper voltage range  
Low backup current  
0.35  
µA / 3 V (Typ.)  
Actual size  
32.768 kHz frequency output function  
:
C-MOS output With Control Pin  
The various functions include full calendar, alarm, timer.  
Block diagram  
Overview  
32.768 kHz  
CONTROL LINE  
• 32.768 kHz frequency output function  
• FOUT pin output (C-MOS output), CL=30 pF  
• Output frequency is selectable from 1/30 Hz to 32.768 kHz  
(32 Values)  
OSC  
DIVIDER  
CLOCK and  
CALENDAR  
• Timer function  
FOUT  
FCON  
• Timer function which can be set up between  
1/4096 second and 255 minutes.  
OUTPUT  
TIMER  
ALARM  
CONTROLLER  
REGISTER  
• It is recorded automatically to TF-bit at the time of event  
occurrence, and it’s possible to output with /TIRQ pin output  
(open-drain output).  
/ TIRQ  
/ AIRQ  
INTERRUPTS  
CONTROLLER  
• Selectable one time mode or repeat mode.  
REGISTER  
• Alarm function  
• Alarm function can be set to any combination of day of  
week, hour, or minute.  
DATA  
CLK  
CONTROL  
REGISTER  
BUS  
•It is recorded automatically to AF-bit at the time of event  
occurrence, and it’s possible to output with /AIRQ pin output  
(open-drain output).  
INTERFACE  
CIRCUIT  
CE 1  
CE 0  
SHIFT REGISTER  
Functions are compatible with RTC-4574 SA / JE / NB.  
Pin Function  
Terminal connection /External dimensions  
(Unit:mm)  
Signal Name Input / Output  
Function  
−
RX 4574 LC  
The chip enabled input pin 0. (Built-in pull-down resistance)  
When both CE0 and CE1 pins are at the “H” level , access to this  
Real time clock module becomes possible.  
CE0  
CE1  
Input  
Input  
DD  
12. V  
1. N.C.  
The chip enabled input pin 1.  
When the CE1 pin is at the HIGH level, the FOUT pin is in the output state.  
2. N.C.  
11. CE1  
10. CLK  
9. DATA  
8. CE0  
CLK  
Input  
Bi-directional  
Output  
The shift clock input pin for serial data transfer.  
3. /TIRQ  
4. /AIRQ  
5. FCON  
6. FOUT  
DATA  
The data input / output pin for serial data transfer.  
This pin outputs the reference clock signal at 32.768 kHz ( C-MOS output ).  
High impedance at the time of output off.  
2.4  
2.8  
FOUT  
FCON  
/ AIRQ  
/ TIRQ  
Input  
The input pin for the FOUT output control.  
The open drain output pin for alarm and time update interrupts.  
The open drain output pin for timer interrupt.  
Connected to a positive power supply.  
Output  
Output  
7. GND  
V
DD  
−
VSOJ 12pin  
GND  
Connected to a ground.  
Specifications (characteristics)  
Refer to application manual for details.  
!
Recommended Operating Conditions  
!
Current consumption characteristics  
Ta = −40 °C to +85 °C  
Item  
Symbol  
Condition  
Min.  
Typ.  
Max.  
Unit  
Item  
Symbol  
Condition  
Min. Typ. Max. Unit  
DD  
Power voltage  
Clock voltage  
Operating  
V
V
1.6  
1.3  
3.0  
3.0  
5.5  
5.5  
V
V
CLK  
DD  
V
= 5 V  
0.45 0.9  
µA  
OPR  
°
T
-40  
+25  
+85  
C
CE0, CE1 = GND  
temperature  
BK  
I
FOUT ;output OFF  
( Hi - z )  
DD  
V
!
Frequency characteristics  
= 3 V  
0.35 0.7  
Item  
Symbol  
Condition  
Rating  
Unit  
Current  
Consumption  
DD  
V
a
°
C
T
V
= +25  
Frequency  
tolerance  
−6  
10  
CE0 = GND  
∆
±
*
×
f / f  
5
23  
= 5 V  
8.0 20.0  
µA  
DD  
= 3.0 V  
DD  
CE1 = V  
a
°
T
= +25  
C
32k  
I
1 Max.  
3 Max.  
s
FOUT ;  
32.768 kHz output ON  
CL = 30 pF  
DD  
DD  
V
Oscillation  
Start-up time  
V
= 1.6 V  
STA  
t
a
°
°
C
= 3 V  
5.0 12.0  
T
= -40 C to +85  
s
DD  
V
= 1.6 V  
*Equivalent to 1 minute of monthly deviation  
http://www.epsontoyocom.co.jp  
1

中文翻译

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