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参数资料
| 型号： | RX-4571SA |
| 厂商： | EPSON TOYOCOM CORP |
| 元件分类： | 时钟/数据恢复及定时提取 |
| 英文描述： | REAL TIME CLOCK, PDSO14 |
| 封装： | ROHS COMPLIANT, SOP-14 |
| 文件页数： | 4/33页 |
| 文件大小： | 579K |
| 代理商： | RX-4571SA |
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RX
4571 SA
Page - 9
ETM21E-02
10.1. Reference information
10.1. Reference Data
(1) Example of frequency and temperature characteristics
-150
-100
-50
0
-50
0
50
100
Temperature [°C]
F
req
ue
ncy
Δ
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.
ΔfT = α ( θT θX ) 2
ΔfT
: 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.
Δf/f = Δf/fo + ΔfT + ΔfV
Δf/f
: Clock accuracy (stable frequency)
in any temperature and voltage.
Δf/fo
: Frequency precision
ΔfT
: Frequency deviation in any temperature.
ΔfV
: Frequency deviation in any voltage.
3. How to find the date difference
Date Difference =
Δf/f × 86400(Sec)
For example: Δf/f = 11.574 × 10-6 is an error of
approximately 1 second/day.
10.2. External connection example
RX
4571
VDD
GND
+
4.7
μF
0.1
μF
Schottky
Barrier
Diode
Note
VDD
D 1
CLK
/ IRQ
FOUT
FOE
DIO
CE
Note :
It uses the secondary battery or
a lithium battery. When using the
seconding battery, the diode is
not required.
When using the
lithium
battery, the diode is
required. For detailed value on
the resistance, please consult a
battery maker.
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|---|---|
| RX-4571SA | 0 TIMER(S), REAL TIME CLOCK, PDSO14 |
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| RX-4591CF | 0 TIMER(S), REAL TIME CLOCK, PDSO10 |
| RX-8025NB | 0 TIMER(S), REAL TIME CLOCK, PDSO22 |
| RX-8581JE-3 | REAL TIME CLOCK, PDSO20 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| RX-4571SAB | 制造商:Epson Toyocom Corporation 功能描述:Cut Tape |
| RX-4574LC | 制造商:EPSONTOYOCOM 制造商全称:Epson ToYoCom 功能描述:SERIAL-INTERFACE REAL TIME CLOCK MODULE |
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