AT-CUT CRYSTAL UNIT
(SMD • Plastic Package)
CM309S
■
FEATURES
1000pcs/reel
7Embeded
with heat resistant cylinder type crystal
bring highly stable characteristics.
7Automatic
mounting and reflowable type.
7Suitable
for various applications such as
communication devices, AV devices, automotive
devices and measuring instruments.
Life-size
■
DIMENSION [mm]
12.4±0.1
#4
#3
4.4±0.2
■
SOLDER PAD LAYOUT [mm]
Internal connection
#4
#3
1.8
7.6
1.8
#1
#1
（1.5）
9.4±0.1
#2
（1.5）
#2
3.6±0.1
0.8
0.8
（1.0）
∗
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
CM309S
3.5MHz∼34.0MHz Fundamental）
（
27.0MHz∼70.0MHz 3rd Overtone）
（
±30ppm
below 6.0MHz ±50ppm
：
above 6.0MHz ±30ppm
：
−
40℃∼
＋
85℃
−
55℃∼
＋
125℃
Conditions
Need to contact us for
the available frequency
f
0
△
f/f
0
△
f/f
0
at 25˚C
−
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
7.0pF Max.
100μW
500MΩMin.
±5ppm Max.
at 25˚C
Need to specify your requirement
DC100V±15V
25℃±3℃
■
MOTIONAL (SERIES) RESISTANCE (R
1
)
Frequency Range
Mode
R
1
3.5MHz≦f
0
＜4.0MHz 4.0MHz ≦ f
0
＜ 6.0MHz 6.0MHz≦f
0
＜10MHz
Fundamental
200ΩMax.
Fundamental
150ΩMax.
Fundamental
100ΩMax.
10MHz≦f
0
＜27MHz
Fundamental
50ΩMax.
27MHz≦f
0
＜36MHz
Fundamental 3rd Overtone
50ΩMax. 100ΩMax.
36MHz≦f
0
≦70MHz
3rd Overtone
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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