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参数资料
| 型号： | RTC-7301SFB |
| 元件分类： | 时钟/数据恢复及定时提取 |
| 英文描述： | REAL TIME CLOCK, PDSO24 |
| 封装： | SSOP-24 |
| 文件页数： | 19/28页 |
| 文件大小： | 274K |
| 代理商： | RTC-7301SFB |
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RTC - 7301 SF / DG
Page - 23
MQ332-05
12. Reference data
[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 / °C
2 )
: Coefficient of secondary
temperature
(
0.035±0.005 ) × 10-6 / °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(s)
* For example:
f/f = 11.574 × 10-6 is an error of
approximately 1 second/day.
(1) Example of frequency and temperature
characteristics
-150
-100
-50
0
-50
0
+50
+100
Temperature [
°C]
F
re
que
nc
y
fT
× 10-6
θT = +25 °C Typ.
α = -0.035 × 10-6 Typ.
(2) Example of frequency and voltage characteristics
- 3
2
Fr
e
que
nc
y
fv
×10
-6
+ 3
± 0
345
Condition :
3 V as reference, Ta=+25
°C
Supply Voltage VDD[V]
(3) Current and voltage consumption characteristics
(3-1) Current consumption when non-accessed (i)
when FOUT=OFF
2
C
u
rr
e
n
tc
o
n
s
um
pt
io
n
[
A]
Supply Voltage VDD[V]
2.0
1.0
345
Condition :
fSCL=0 Hz, Ta=+25
°C, FOUT=OFF
(3-2) Current consumption when non-accessed (ii)
when FOUT=32.768 kHz
CL=30 pF
2
10
5
345
Condition :
fSCL=0 Hz, Ta=+25
°C, FOUT=32.768 kHz
CL=0 pF
C
u
rr
e
n
tc
o
n
s
um
pt
io
n
[
A]
Supply Voltage VDD[V]
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相关代理商/技术参数 |
参数描述 |
|---|---|
| RTC-840 | 制造商:AAEON 制造商全称:AAEON 功能描述:Intel?? Corea?￠ Duo U2500 1.2 GHz Processor |
| RTC-8563JE | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Real-Time Clock |
| RTC-8563SA | 制造商:EPSONTOYOCOM 制造商全称:Epson ToYoCom 功能描述:RTC-8563SA |
| RTC-8563SJE | 制造商:EPSONTOYOCOM 制造商全称:Epson ToYoCom 功能描述:RTC-8563SA |
| RTC-8564JE | 制造商:Epson Toyocom Corporation 功能描述:32.768kHz 275nA@3ViTyp.j 3.0V (typ.) 7.0~5.4~1.5mm +85 -40 5}23ppm@+25/3.0V 7mm 5.4mm 1.5mm 制造商:Epson Toyocom Corporation 功能描述:RTC I2C BUS INTERFACE SMD VSOJ-20 制造商:Epson Toyocom Corporation 功能描述:RTC I2C BUS INTERFACE, SMD, VSOJ-20 制造商:Epson Toyocom Corporation 功能描述:IC, RTC, FULL CALENDAR, VSOJ-20; Clock Format:12Hr / 24Hr; Clock IC Type:RTC; Supply Voltage Min:1.8V; Supply Voltage Max:5.5V; Digital IC Case Style:VSOJ; No. of Pins:20; IC Interface Type:I2C; Operating Temperature Min:-40C ;RoHS Compliant: Yes 制造商:Epson Toyocom 功能描述:RTC module,I2C Bus,Alarm,timer func |
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