Surface Mount Quartz Crystal
FEATURES
•
Standard 2.5x2.0mm Surface Mount Footprint
•
Stable Frequency Over Temperature and
Drive Level
•
Fundamental Crystal Design
•
Frequency Range 16 – 54 MHz
•
Frequency Tolerance, ±30 ppm Standard
(±10 ppm, ±15 ppm and ±20 ppm available)
•
Frequency Stability, ±50 ppm Standard
(±10,±15,±20,±30 and ±40 ppm available)
•
Operating Temperature to –40°C to +85°C
•
Tape & Reel Packaging, EIA-481-2 Compliant
•
RoHS/Green Compliant (6/6)
Model 425
DESCRIPTION
The Model 425 is a ceramic packaged Crystal
offering reduced size, ideal for high-density
circuit board applications. The Model 425 offers
reliable precision and excellent shock
performance in wireless telecommunication
devices.
ORDERING INFORMATION
425
MODE OF OSCILLATION
F = Fundamental
FREQUENCY TOLERANCE @ 25°C
1 = ± 10 ppm
X = ± 15 ppm
2 = ± 20 ppm
3 = ± 30 ppm (standard)
STABILITY TOLERANCE/TEMPERATURE RANGE
Over Operating Temperature Range
(Referenced to 25°C Reading)
M
FREQUENCY IN MHz
M - indicates MHz and decimal point.
Frequency is recorded with minimum 4
significant digits to the right of the "M".
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
J = 9 pF
K = 8 pF
L = 12 pF
S = Series
1 = ± 10 ppm, -20°C to +70°C
X = ± 15 ppm, -20°C to +70°C
2 = ± 20 ppm, -20°C to +70°C
3 = ± 30 ppm, -20°C to +70°C
4 = ± 40 ppm, -20°C to +70°C
5 = ± 50 ppm, -20°C to +70°C (standard)
6 = ± 20 ppm, -40°C to +85°C
7 = ± 30 ppm, -40°C to +85°C
8 = ± 40 ppm, -40°C to +85°C
9 = ± 50 ppm, -40°C to +85°C
Example Part Numbers:
425F35E014M3181
425FX9A050M0000
Custom performance characteristics are available upon request.
Use form C052 to detail non-standard parameters.
Not all performance combinations and frequencies may be available.
Contact your local CTS Representative or CTS Customer Service for availability.
Document No. 008-0332-0
Page 1 - 3
Rev. B
٠ ٠ ٠
CTS Electronic Components, Inc.
٠
171 Covington Drive
٠
Bloomingdale, IL 60108
٠ ٠ ٠
٠ ٠ ٠
www.ctscorp.com
٠ ٠ ٠
2.5x2.0mm Low Cost
Surface Mount Crystal
Model 425
ELECTRICAL CHARACTERISTICS
PARAMETER
Operating Mode
Crystal Cut
Frequency Range
Frequency Tolerance @ 25°C
Electrical Parameters
VALUE
Fundamental
AT-Cut
16.0 MHz to 54.0 MHz
± 30 ppm Standard
(± 10 ppm, ±15 ppm and ± 20 ppm Available)
Frequency Stability Tolerance
(Operating Temperature Range, Referenced to 25°C Reading)
± 50 ppm Standard
(± 10 ppm, ±15 ppm, ± 20 ppm, ± 30 ppm and ± 40 ppm Available)
Operating Temperature Range
Storage Temperature Range
Equivalent Series Resistance
Load Capacitance or Resonance Mode
Shunt Capacitance (C
0
)
Drive Level
Aging @ 25°C
Reflow Condition, per JEDEC J-STD-020
-20°C to +70°C Standard
(-40°C to +85°C Available)
-40°C to +85°C
See ESR Table
See Ordering Information
5.0 pF Maximum
10 µW Typical, 100 µW Maximum
± 3 ppm/year maximum
+255°C ± 5°C, 10 Seconds Maximum
EQUIVALENT SERIES RESISTANCE TABLE
FREQUENCY RANGE
16.00 MHz - 19.999 MHz
20.00 MHz - 29.999 MHz
30.00 MHz - 39.999 MHz
40.00 MHz - 54.000 MHz
MODE of OSCILLATION
Fundamental
Fundamental
Fundamental
Fundamental
ESR Maximum
100 Ohms
80 Ohms
80 Ohms
60 Ohms
MECHANICAL SPECIFICATIONS
PACKAGE DRAWING
( 2.50 ±0.10 )
0.098 ±0.004
Top View
MARKING INFORMATION
1.
2.
3.
4.
XX.XX – Frequency in MHz.
C – CTS and Pin 1 identifier.
** – Manufacturing Site Code.
D – Manufactured Date Code. See Table I for
codes.
5. Complete CTS part number, frequency value and
date code information must appear on reel and
box labels.
#4
#3
( 2.00 ±0.10 )
0.079 ±0.004
XX.XX
C**D
#2
#1
#2
( 0.65 )
MAX
0.026
SUGGESTED SOLDER PAD GEOMETRY
( 0.725 )
0.029
( 0.675 )
0.027
0.039 [1.00]
1
4
2
( 0.700 )
0.028
0.035 [0.90]
4
3
0.061 [1.55]
( MM )
Key:
Inch
Bottom View
3
( 1.625 )
0.064
Notes:
1. Termination pads (e4), barrier-plating is nickel (Ni) with gold (Au) flash plate.
2. Terminations #2, #4 and the metal lid are connected internally.
End user may connect these pins to circuit ground.
Document No. 008-0332-0
Page 2 - 3
1
0.073 [1.85]
2
Key:
[mm]
Inch
Rev. B
٠ ٠ ٠
CTS Electronic Components, Inc.
٠
171 Covington Drive
٠
Bloomingdale, IL 60108
٠٠٠
2.5x2.0mm Low Cost
Surface Mount Crystal
TABLE I
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
Model 425
TAPE AND REEL INFORMATION
DIMENSIONS IN MILLIMETERS
11.50
Ø
13
Ø
1.55
4.00
4.00
1.75
1.55
120°
1.75
2.70
8.00
Ø
60
Ø
178
2.25
Ø
23
DIRECTION OF FEED
Device quantity is 3,000 pieces mimimum per 178mm reel.
ENVIRONMENTAL SPECIFICATIONS
Temperature Cycle:
Mechanical Shock:
Sinusoidal Vibration:
Gross Leak:
Fine Leak:
Resistance to Solder Heat:
High Temperature Operating Bias:
Frequency Aging:
Insulation Resistance:
Moisture Sensitivity Level:
400 cycles from –55°C to +125°C, 10 minute dwell at each temperature, 1 minute transfer time
between temperatures.
1,500g’s, 0.5mS duration, ½ sinewave, 3 shocks each direction along 3 mutually perpendicular
planes (18 total shocks).
0.06 inches double amplitude, 10 to 55 Hz and 20g’s, 55 to 2,000 Hz, 3 cycles each in 3 mutually
perpendicular planes (9 times total).
No leak shall appear while immersed in an FC40 or equivalent liquid at +125°C for 20 seconds.
Mass spectrometer leak rates less than 2x10
-8
ATM cc/sec air equivalent.
Product must survive 3 reflows of +260°C peak, 10 seconds maximum.
2,000 hours at +125°C, disregarding frequency shift.
1,000 hours at +85°C, maximum ±5 ppm shift.
500M Ohms @ 100V
DC
±15V
DC
.
Level 1 per JEDEC J-STD-020.
Document No. 008-0332-0
Page 3 - 3
Rev. B
٠ ٠ ٠
CTS Electronic Components, Inc.
٠
171 Covington Drive
٠
Bloomingdale, IL 60108
٠٠٠
分立器件
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