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AT-CUT CRYSTAL UNIT (SMD ? Plastic Package)
CM309S
1000pcs/reel
■ FEATURES
7 Embeded with heat resistant cylinder type crystal
bring highly stable characteristics.
7 Automatic mounting and reflowable type.
7 Suitable for various applications such as
communication devices, AV devices, automotive
devices and measuring instruments.
Life-size
■ DIMENSION [mm]
12.4±0.1
■ SOLDER PAD LAYOUT [mm]
#4
#3
Internal connection
#4
#3
#1
#2
#1
#2
1.8
7.6
1.8
（1.5）
9.4±0.1
（1.5）
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
f 0
△ f/f 0
△ f/f 0
T OPR
T STR
R 1
C L
C 0
D L
I R
△ f/f 0
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℃
Refer to the following table
16.0pF, 18.0pF
7.0pF Max.
100μW
500MΩMin.
±5ppm Max.
Conditions
Need to contact us for
the available frequency
at 25?C
? 10℃～ ＋ 60℃
See figure 3 in P4
at 25?C
Need to specify your requirement
DC100V±15V
25℃±3℃
■ MOTIONAL (SERIES) RESISTANCE (R 1 )
Frequency Range
3.5MHz≦f 0 ＜4.0MHz 4.0MHz ≦ f 0 ＜ 6.0MHz 6.0MHz≦f 0 ＜10MHz
10MHz≦f 0 ＜27MHz
27MHz≦f 0 ＜36MHz
36MHz≦f 0 ≦70MHz
Mode
R 1
Fundamental
200ΩMax.
Fundamental
150ΩMax.
Fundamental
100ΩMax.
Fundamental
50ΩMax.
Fundamental 3rd Overtone
50ΩMax. 100ΩMax.
3rd Overtone
80ΩMax.
http://cfm.citizen.co.jp/english/product/pr02.html
15
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