AT-CUT CRYSTAL UNIT
(SMD • Plastic Package)
RoHS compliant
CM309E
■
FEATURES
1000pcs/reel
•
Embeded with heat resistant cylinder type crystal
bring highly stable characteristics.
•
Automatic mounting and reflowable type.
•
Suitable for various applications such as
Life-size
communication devices, AV devices, and
measuring instruments.
■
DIMENSION [mm]
Internal connection
■
SOLDER PAD LAYOUT [mm]
1.8
7.6
1.8
∗
Do not connect to external with #2 and #3
■
STANDARD SPECIFICATIONS
Item
Nominal Frequency
Frequency Tolerance
Frequency Tolerance
over Operating
Temperature Range
Operating Temperature Range
Storage Temperature Range
Motional (series) resistance
Load capacitance
Shunt capacitance
Level of drive
Insulation Resistance
Aging (first year)
Model
CM309E
4.000MHz∼29.999MHz Fundamental）
（
30.000MHz∼64.000MHz 3rd Overtone）
（
±30ppm
below 5.5MHz ±50ppm
：
above 5.5MHz ±30ppm
：
−
40℃∼
＋
85℃
−
55℃∼
＋
125℃
Conditions
Need to contact us for
the available frequency
f
0
△
f/f
0
△
f/f
0
at 25℃
−
10℃∼
＋
60℃
See figure 3 in P4
T
OPR
T
STR
R
1
C
L
C
0
D
L
I
R
△
f/f
0
Refer to the following table
16.0pF, 18.0pF
5.0pF Max.
100μW
500MΩMin.
±5ppm Max.
at 25℃
Need to specify your requirement
DC100V±15V
25℃±3℃
■
MOTIONAL (SERIES) RESISTANCE (R
1
)
Frequency Range
4.0MHz≦f
0
＜5.5MHz 5.5MHz ≦ f
0
＜ 6.0MHz 6.0MHz≦f
0
＜10.0MHz 10.0MHz≦f
0
＜12.0MHz 12.0MHz≦f
0
＜16.0MHz 16.0MHz≦f
0
＜30.0MHz 30.0MHz≦f
0
＜36.0MHz 36.0MHz≦f
0
＜64.0MHz
Mode
R
1
Fundamental Fundamental Fundamental Fundamental Fundamental Fundamental 3rd Overtone 3rd Overtone
150ΩMax.
100ΩMax.
80ΩMax.
60ΩMax.
50ΩMax.
40ΩMax.
100ΩMax.
80ΩMax.
http://cfm.citizen.co.jp/english/product/pr02.html
15
1.8
1.7
1.8
嵌入式系统
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