Surface Mount Quartz Crystal
•
Standard 5.0mm x 3.2mm Glass Seal Package
•
Fundamental Crystal Design
•
Frequency Range 10 – 50 MHz
•
Frequency Tolerance, ±20 ppm Standard
[other tolerances available]
•
Frequency Stability, ±30 ppm Standard
[other stabilities available]
•
Operating Temperature to -40°C to +85°C
•
Tape & Reel Packaging Standard, EIA-481
•
RoHS Compliant in Accordance with EU Directive 2005/95/EC
- Lead-Free Termination Finish
- Exemption 5 for Pb in glass material used for cover attach
Model 445
FEATURES
APPLICATIONS
Model 445 is a low cost device used in a wide range of commercial applications including
notebooks, computer peripherals, audio visual, Bluetooth and USB interfaces, PDAs, and automotive electronics.
ORDERING INFORMATION
445
OPERATING TEMPERATURE RANGE
W = 0°C to +50°C
A = -10°C to +60°C
C = -20°C to +70°C (standard)
I = -40°C to +85°C (standard)
FREQUENCY TOLERANCE @ 25°C
2 = ± 20 ppm (standard)
3 = ± 30 ppm
STABILITY OVER TEMPERATURE
1 = ± 10 ppm
X = ± 15 ppm
2 = ± 20 ppm
1
2
M
FREQUENCY IN MHz
M - indicates MHz and decimal point.
3
LOAD CAPACITANCE
A = 10 pF
B = 13 pF
C = 16 pF
D = 18 pF
E = 20 pF
F = 24 pF
G = 30 pF
H = 32 pF
Example Part Numbers:
445C23D14M31818
445I23E14M31818
J = 9 pF
K = 8 pF
L = 12 pF
S = Series
3 = ± 30 ppm (std)
5 = ± 50 ppm
1] Only available with temperature range codes "W" and "A".
2] Only available with temperature range codes "W", "A" and "C".
3] Frequency is recorded with two leading digits before the ‘M’ and 5 significant digits after the ‘M’ (including zeros).
Not all performance combinations and frequencies may be available.
Contact your local CTS Representative or CTS Customer Service for availability.
PACKAGING INFORMATION
Device quantity is 1,000 pieces minimum per 180mm reel.
DIMENSIONS IN MILLIMETERS
17.5
Ø13.5
2.0
4.0
8.0
Ø1.50
1.75
1.95
120°
Ø60
Ø180
5.40
12.0
Ø21.4
3.5
DIRECTION OF FEED
Document No. 008-0360-0
Page 1- 2
Rev. B
www.ctscorp.com
Quartz Crystal
ELECTRICAL CHARACTERISTICS
PARAMETER
Frequency Range
Operating Mode
Crystal Cut
Frequency Tolerance @ +25°C
Frequency Stability Tolerance
(Operating Temperature Range, Referenced to 25°C Reading)
Model 445
Operating Temperature Ranges
Equivalent Series Resistance
[Maximum]
Load Capacitance or Resonance Mode
Shunt Capacitance (C
0
)
Drive Level
Aging @ +25°C
Storage Temperature Range
VALUE
10 MHz to 50 MHz
Fundamental
AT-Cut
±20 ppm, ±30 ppm
±10 ppm, ±15 ppm,
±20 ppm, ±30 ppm, ±50 ppm
0°C to +50°C
-10°C to +60°C
-20°C to +70°C
-40°C to +85°C
10 MHz - < 12 MHz
100 Ohms
12 MHz - < 16 MHz
50 Ohms
16 MHz - < 30 MHz
40 Ohms
30 MHz - < 50 MHz
30 Ohms
See Ordering Information
5.0 pF Typical, 7.0 pF Maximum
10 µW Min., 100 µW Typ., 300 µW Max.
±3 ppm/yr Typical
-40°C to +85°C
MECHANICAL SPECIFICATIONS
PACKAGE DRAWING
MARKING INFORMATION
1. M445 - CTS Model Series.
2. C – CTS.
3. D – Date code. See Table I for codes.
4. XXX – Frequency code.
Frequency Code
120 = 12.00 143 = 14.31818 200 = 20.00 245 = 24.5760 270 = 27.00
130 = 13.00 160 = 16.0000 240 = 24.00 250 = 25.0000 300 = 30.00
ELECTRICAL PARAMETERS
M445
CDXXX
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, 10 seconds.
SUGGESTED SOLDER PAD GEOMETRY
TABLE I – DATE CODE
MONTH
YEAR
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
JAN
A
N
a
n
FEB
B
P
b
p
MAR
C
Q
c
q
APR
D
R
d
r
MAY
E
S
e
s
JUN
F
T
f
t
JUL
G
U
g
u
AUG
H
V
h
v
SEP
J
W
j
w
OCT
K
X
k
x
NOV
L
Y
l
y
DEC
M
Z
m
z
Document No. 008-0360-0
Page 2 - 2
Rev. B
51单片机
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