- 您现在的位置：买卖IC网 > PDF目录69323 > RTC-4574NBB 0 TIMER(S), REAL TIME CLOCK, PDSO22 PDF资料下载
参数资料
| 型号： | RTC-4574NBB |
| 元件分类： | 时钟/数据恢复及定时提取 |
| 英文描述： | 0 TIMER(S), REAL TIME CLOCK, PDSO22 |
| 封装： | SON-22 |
| 文件页数： | 3/14页 |
| 文件大小： | 620K |
| 代理商： | RTC-4574NBB |
RTC
4574 SA / JE / NB
Page - 8
MQ302-07 SAJENB01
10. Reference information
10.1. Reference Data
(1) Example of frequency and temperature characteristics
-150
-100
-50
0
-50
0
50
100
Temperature [
°C]
F
requenc
y
fT
× 10
-6
θT = +25 °C Typ.
α = -0.035 × 10
-6
Typ.
[ Finding the frequency stability ]
1. Frequency and temperature characteristics can be
approximated using the following equations.
fT = α ( θT θX ) 2
fT
: Frequency deviation in any temperature
α [ 1 / °C2 ]
: Coefficient of secondary temperature
(
0.035 ± 0.005 ) × 106 / °C2
θT [ °C ]
: Ultimate temperature ( +25
± 5 °C )
θX [ °C ]
: Any temperature
2. To determine overall clock accuracy, add the
frequency precision and voltage characteristics.
f/f = f/fo + fT + fV
f/f
: Clock accuracy (stable frequency)
in any temperature and voltage.
f/fo
: Frequency precision
fT
: Frequency deviation in any temperature.
fV
: Frequency deviation in any voltage.
3. How to find the date difference
Date Difference =
f/f × 86400(Sec)
For example: f/f = 11.574 × 10
-6 is an error of
approximately 1 second/day.
(2) Example of the frequency/voltage characteristics
- 5
2
- 10
+ 10
+ 5
0
34
5
Frequency [
×10
-6]
3 V as reference and Ta=+25 °C
Condition:
Supply Voltage V DD [V]
(3) Example of the current consumption/voltage
characteristics
FOUT=32.768 kHz
CL=30 pF
FOUT=0 Hz
2
Supply Voltage V DD [V]
10
5
3
4
5
Current consumption (A)
During clock movement and Ta=+25 °C
Condition:
(4) Oscillation start time characteristics
0
5
10
-40
-30
-20
-10
0
+10
+20
+30
+40
+50
+60
+70
+80
+90
Oscillation start time tSTA [s]
VDD 2.0 V
VDD 3.0 V
VDD 5.0 V
Oscillation start time
temperature Ta [°C]
Note: This data is taken from the sample lot. For the rated value, see the specification on [7. Frequency Characteristics] .
相关PDF资料 |
PDF描述 |
|---|---|
| RTC-4574SAB-0 | 0 TIMER(S), REAL TIME CLOCK, PDSO14 |
| RTC-4574SAB-3 | 0 TIMER(S), REAL TIME CLOCK, PDSO14 |
| RTC-4574JEB | 0 TIMER(S), REAL TIME CLOCK, PDSO20 |
| RTC-4701JEB | REAL TIME CLOCK, PDSO20 |
| RTC-62423B-0 | REAL TIME CLOCK, PDSO24 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| RTC-4574SA | 制造商:Epson Toyocom Corporation 功能描述:32.768kHz 0.5uA@3ViTyp.j 10.1~5.0~3.2mm +85 -40 5}23ppm@+25/3.0V 10.1mm 5mm 3.2mm Cut Tape 制造商:Epson Toyocom 功能描述:RTC module,3Wire Serial,Alarm,SOP14 |
发布紧急采购，3分钟左右您将得到回复。