TUNING FORK CRYSTAL UNIT
RoHS compliant / Pb free
(Cylinder Type)
CFS-206・CFS-145
・
■
FEATURES
● Frequency range : 32.768kHz
● External dimensions (mm)
CFS-206 Φ : 2.0 x L : 6.2
CFS-145 Φ : 1.5 x L : 5.1
● Applications
Watch / Clock / Security devices /
Consumer products
■
DIMENSION
[mm]
CFS-206
CFS-145
■
STANDARD SPECIFICATIONS
Item
Model
CFS-206
32.768kHz
CFS-145
Conditions
Nominal Frequency
Frequency Tolerance
Load capacitance
Operating Temperature Range
Storage Temperature Range
Turnover Temperature
Temperature Coefficient
Motional (series) resistance
Level of drive
Aging (first year)
Shunt capacitance
f
0
Δf/f
0
C
L
T
OPR
T
STR
T
M
β
R
1
D
L
Δf/f
0
C
0
1.2pF Typ.
±5ppm / ±10ppm / ±20ppm
6.0pF / 7.0pF / 8.0pF / 12.5pF
-20℃ ½ +70℃
-40℃ ½ +85℃
25℃±5℃
-0.034±0.006ppm/℃
2
35KΩ Max.
1μW Max.
±3ppm Max.
1.0pF Typ.
40KΩ Max.
at 25℃
Please specify
your requirement
at 25℃
25℃±3℃
http://cfd.citizen.co.jp/english/prod-tech/product/cvo_top.html
■
PART NUMBERING SYSTEM
CFS-206 / CFS-145 32768 D Z F B - □□□
Frequency
Frequency Tolerance
（at 25℃)
Frequency Tolerance over
Operating Temp. Range
Package specification
CITIZEN
management code
B
Please specify
the frequency
in Hz.
D
E
H
±20ppm
(STD)
±10ppm
±5ppm
Z
Standard Spec.
Only Bulk
Ref. Code for
internal use.
Load capacitance (CL)
B
F
V
Y
6.0pF
12.5pF
(STD)
8.0pF
7.0pF
*Please contact us for specifications available.
■
Part Marking
CFS-206
[standard]
CFS-145
22ym
#####
22 : Manufacture's ID Code
No marking
y : The last digit of production year
m : Production month (See Table.1)
# : Production Lot No.
Table.1
Month
Code
Jan Feb
1
2
…
…
Sep Oct Nov Dec
9
X
Y
Z
■
Handling Notes
Mounting
Soldering the body of cylinder type crystal unit must
be strictly avoided as it may cause significant
deterioration in characteristics of the product.
Rubber adhesive is recommended for mounting.
Bending Lead
Hold the body of crystal unit by hand, and the part to be
bent with tweezers leaving more than 1.5mm of lead from
the body case. (3.0mm is recommended)
Bend the lead 90°holding with the tweezers. Pulling the
lead strongly may crack the hermetic seal glass at the root
of the lead and may cause the airtightness and the
characteristics to deteriorate.
Rev.1
http://cfd.citizen.co.jp/english/prod-tech/product/cvo_top.html
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