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 2011/65/EU
- Lead-Free Termination Finish
- Exemption 7(c)-I, Electrical and electronic components containing lead [Pb] in glass
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
1
X = ± 15 ppm
2
2 = ± 20 ppm
3 = ± 30 ppm [std]
5 = ± 50 ppm
A = 10 pF
B = 13 pF
C = 16 pF
D = 18 pF
M
FREQUENCY IN MHz
M - indicates MHz and decimal point.
3
LOAD CAPACITANCE
E = 20 pF
F = 24 pF
G = 30 pF
H = 32 pF
J = 9 pF
K = 8 pF
L = 12 pF
S = Series
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
[Reference]
Factory may package reels in quantities of 1k pcs. or 3k pcs. Reel size is 180mm.
Document No. 008-0360-0
Page 1- 2
Rev. C
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.
Reference CTS document 016-1454-01.
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.
4. MSL – 1.
SUGGESTED SOLDER PAD GEOMETRY
ELECTRICAL PARAMETERS
M445
CDXXX
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. C
实时操作系统RTOS
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