TF20 Series

TF20 Series
Tuning Fork Crystal
FEATURES
•
•
•
•
•
•
•
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32.7680 kHz Frequency Reference
Package Size 2.0mm x 1.2mm
Tuning Fork Crystal Design
Hermetic Ceramic Package
Frequency Tolerance, ±20 ppm Standard
[±10 ppm, ±30 ppm and ±50 ppm available]
Frequency Temperature Coefficient, -0.030ppm/°C2
Operating Temperature, -40°C to +85°C Standard
Tape & Reel Packaging, EAI-481-2
RoHS/Green Compliant (6/6)
APPLICATIONS
The TF20 crystal series is ideal for use in a wide range of communication equipment,
notebooks, computer peripherals, audio visual, Bluetooth and other wireless applications, USB interfaces, PDAs
and automotive electronics.
ORDERING INFORMATION
TF 2 0
3 2 K 7 6 8 0
PACKAGE SIZE
PACKAGING OPTIONS
T - 1k pcs./reel
R - 3k pcs./reel
20 = 2.0mm x 1.2mm
FREQUENCY TOLERANCE @ 25°C
1
2
3
5
=
=
=
=
±
±
±
±
10
20
30
50
FREQUENCY IN kHz
ppm
ppm [standard]
ppm
ppm
K - indicates kHz and decimal point.
1
LOAD CAPACITANCE
P = 12.5 pF [standard]
J = 9 pF
1] Frequency is recorded with two leading digits before the ‘K’ and 4 significant digits after the ‘K’ (including zeros).
Not all performance combinations and frequencies may be available.
Contact your local CTS Representative or CTS Customer Service for availability.
PACKAGING INFORMATION [reference]
Factory may package reels in quantities of 1k pcs. or 3k pcs. Reel size is 180mm.
DIMENSIONS IN MILLIMETERS
4.0
4.0
Ø1.50
1.75
0.8
8.0
2.25
1.45
DIRECTION OF FEED
Document No. 008-0353-0
Page 1- 3
www.ctscorp.com
Rev. C
TF20 Series
Tuning Fork Crystal
ELECTRICAL PARAMETERS
ELECTRICAL CHARACTERISTICS
PARAMETER
Frequency
Operating Mode
Frequency Tolerance *
Frequency Temperature Coefficient
Frequency Stability
Operating Temperature Range
Turnover Temperature
Load Capacitance *
Aging
Drive Level
Shunt Capacitance
Motional Capacitance
Series Resistance
Insulation Resistance
Storage Temperature Range
SYMBOL
f0
Δf/f0
Δf/fM
CONDITIONS
@+25°C
TA
TM
CL
Δf/f0
DL
C0
C1
R1
Ri
TSTR
±5°C
Standard
@+25°C, 1st year
@1 MHz
+100Vdc ±15Vdc
MIN
TYP
MAX
32.7680
Flexural Mode [Tuning Fork]
20
-0.030 ±0.01ppm/°C2
See Figure 1
-40
+85
+25
12.5
3.0
0.1
0.5
7.0
7.0
90
500
-55
+125
UNIT
kHz
± ppm
°C
°C
pF
± ppm
µW
pF
fF
k Ohms
M Ohms
°C
* See Ordering Information for available options.
FIGURE 1
PARABOLIC TEMPERATURE CURVE
0
-40
-30
-20
-10
0
10
20
30
40
50
60
70
80
90
-10
-20
-30
-40
Frequency stability [ppm] is determined using parabolic
curve, Δf = Temperature Coefficent(TA-TM)2.
Δf/f [ppm]
-50
-60
Ex. Find frequency stability at TA = 45°C
Δf = -0.030(45-25)2
Δf = -0.030(20)2
Δf = -12.0 ppm
-70
-80
-90
-100
-110
-120
-130
Temperature [°C]
Document No. 008-0353-0
Page 2 - 3
Rev. C
TF20 Series
Tuning Fork Crystal
MECHANICAL SPECIFICATIONS
TF20 PACKAGE DRAWING
TF20D
MARKING INFORMATION
1. TF20 - CTS Model Series.
2. D – Date code. See Table I for codes.
TABLE I – DATE CODE
MONTH
JAN
YEAR
FEB
MAR
APR
MAY
JUN
JUL
AUG
SEP
OCT
NOV
DEC
M
2001
2005
2009
2013
2017
A
B
C
D
E
F
G
H
J
K
L
2002
2006
2010
2014
2018
N
P
Q
R
S
T
U
V
W
X
Y
Z
2003
2007
2011
2015
2019
a
b
c
d
e
f
g
h
j
k
l
m
2004
2008
2012
2016
2020
n
p
q
r
s
t
u
v
w
x
y
z
SUGGESTED SOLDER PAD GEOMETRY
(0.6)
(0.6)
(0.8)
0.024
0.031
NOTES
1. Complete CTS part number, frequency value,
date code and manufacturing site code information
must appear on reel and carton labels.
2. Termination pads (e4); barrier plating is nickel [Ni]
with gold [Au] flash plate.
3. Reflow conditions per JEDEC J-STD-020;
260°C maximum, 20 seconds.
4. MSL = 1.
0.024
(1.1)
0.043
Key:
(mm)
inch
Document No. 008-0353-0
Page 3 - 3
Rev. C