TF20 Series
Features
Tuning Fork Crystal
32.7680kHz Frequency Reference
Tuning Fork Crystal Design
Hermetic Ceramic Surface Mount Package
Ideal for High Density Circuit Boards
Frequency Tolerance, ±20ppm Standard
Parabolic Temperature Coefficient
Tape and Reel Packaging, EIA-418
Real Time Clock Reference
FPGAs & Microcontrollers
Wearable Electronics
IoT Applications
Consumer Electronics
Healthcare Devices
Smart Meters
Instrumentation
Part Dimensions:
2.0 × 1.2 × 0.6mm
•
4.5926mg
Applications
Description
CTS TF20 Series is ideal for supporting wide range of electronic designs requiring a Real Time Clock reference.
This series will support general commercial and industrial applications.
Ordering Information
Model
TF
20
Frequency
Tolerance
2
Load
Capacitance
P
Frequency Code
[kHz]
Packaging
R
32K7680
Code
20
Package
2.0x1.2mm
Code
P
J
V
W
Capacitance
12.5pF
9pF
7pF
5pF
Packing
Code
3k pcs./reel
R
Code
2
1
@ +25°C
±20ppm
±10ppm
Code
Frequency
Product Frequency Code
1
Notes:
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.
This product is specified for use only in standard commercial applications. Supplier disclaims all express and implied
warranties and liability in connection with any use of this product in any non-commercial applications or in any
application that may expose the product to conditions that are outside of the tolerances provided in its specification.
DOC# 008-0353-0 Rev. E
Page 1 of 4
©2017 CTS® Corporation. Information/product(s) subject to change. No warranty that product(s) will meet the stated specifications for customer specific applications or test
equipment. Visit www.ctscorp.com for list of applicable patent(s), more information, or to request a quote.
Tuning Fork Crystal
TF20 Series
Electrical Specifications
Operating Conditions
P ARAMETER
O perating Temperature
Turnover Temperature
Storage Temperature
SYMBO L
T
A
T
M
T
STG
CO NDITIO NS
-
-
-
MIN
-40
+20
-55
TYP
+25
+25
-
MAX
+85
+30
+125
UNIT
°C
°C
°C
Frequency Stability
P ARAMETER
Frequenc y
Frequenc y Toleranc e
[Note 1]
SYMBO L
f
O
Δf/f
O
ß
Δf/f
0
CO NDITIO NS
-
Standard @ +25°C
See Figure 1
First Year @ +25°C
MIN
TYP
32.7680
MAX
UNIT
kHz
-20
-
-0.034 ±0.006
20
ppm
ppm/°C
2
P arabolic Coeffic ient
Aging
-3
-
3
ppm
Crystal Parameters
P ARAMETER
O perating Mode
Load Capac itanc e
[Note 1]
SYMBO L
-
C
L
C
0
C
1
R
1
DL
R
i
CO NDITIO NS
-
Standard
-
-
-
-
+100Vdc ±15Vdc
MIN
TYP
MAX
UNIT
-
pF
pF
fF
kΏ
µW
MΏ
Flexural Mode [Tuning Fork]
-
-
-
-
-
500
12.5
1.3
6.4
-
0.5
-
-
-
-
90
1.0
-
Shunt Capac itanc e
Motional Capac itanc e
Series Resistanc e
Drive Level
Insulation Resistanc e
1.] See Ordering Information for available options.
Figure 1
Frequency Stability [Δf] at a given temperature,
Δf =
ß[T
A
-T
M
]
2
ß = Parabolic Coefficient
T
A
= Ambient Temperature
T
M
= Turnover Temperature
Ex. Find frequency stability at T
A
= +45°C
Δf = -0.034[45-25]
2
Δf = -0.034[20]
2
Δf = -13.6ppm
DOC# 008-0353-0 Rev. E
Page 2 of 4
©2017 CTS® Corporation. Information/product(s) subject to change. No warranty that product(s) will meet the stated specifications for customer specific applications or test
equipment. Visit www.ctscorp.com for list of applicable patent(s), more information, or to request a quote.
Tuning Fork Crystal
TF20 Series
Mechanical Specifications
Package Drawing
Marking Information
Refer to document 016-0071-0, TF Marking Guide, for
marking format by product family.
Recommended Pad Layout
Notes
1. JEDEC termination code (e4). Barrier-plating is
nickel [Ni] with gold [Au] flash plate.
2. Reflow conditions per JEDEC J-STD-020; +260°C
maximum, 20 seconds.
3. MSL
=
1.
DOC# 008-0353-0 Rev. E
Page 3 of 4
©2017 CTS® Corporation. Information/product(s) subject to change. No warranty that product(s) will meet the stated specifications for customer specific applications or test
equipment. Visit www.ctscorp.com for list of applicable patent(s), more information, or to request a quote.
Tuning Fork Crystal
TF20 Series
Packaging - Tape and Reel
Tape Drawing
Reel Drawing
Notes
1. Device quantity is 3k pieces maximum per 180mm reel.
2. Complete CTS part number, frequency value, date code and manufacturing site code information must appear
on reel and carton labels.
DOC# 008-0353-0 Rev. E
Page 4 of 4
©2017 CTS® Corporation. Information/product(s) subject to change. No warranty that product(s) will meet the stated specifications for customer specific applications or test
equipment. Visit www.ctscorp.com for list of applicable patent(s), more information, or to request a quote.
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