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
Model 425
Surface Mount Quartz Crystal
ORDERING INFORMATION
425
MODE OF OS C ILL ATI ON FRE
Q
UENCY IN MHz
F = Fundamental M - indicates MHz and decimal point.
Frequency is recorded with minimum 4
significant digits to the right of the "M".
M
FRE
Q
UENCY TOL ER ANCE @ 2 5 ° C
1 = ± 10 ppm
X = ± 15 ppm
2 = ± 20 ppm
3 = ± 30 ppm (standard)
LOAD CAPACITA NCE
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
STABILITY TOLERANCE/TEMPERATURE RANGE
Over Operating Temperature Range
(Referenced to 25°C Reading)
Example Part Numbers:
425F35E014M3181
425FX9A050M0000
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
Not all performance combinations and f requencies may be available .
Contact your local CTS Representat ive or CTS Customer Service for availability.
Custom performance characteristics are available upon request.
Use form C052 to detail non-standard parameters.
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)
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.
Document No. 008-0332-0 Page 2 - 3 Rev. B
٠ ٠ ٠ CTS Electronic Components, Inc. ٠ 171 Covington Drive ٠ Bloomingdale, IL 60108 ٠ ٠ ٠
Model 425
2.5x2.0mm Low Cost
Surface Mount Crystal
ELECTRICAL CHARACTERISTICS
PARAMETE
R
V
ALUE
O
p
eratin
g
Mode Fundamental
Cr
y
stal Cut AT-Cut
Fre
q
uenc
y
Ran
g
e 16.0 MHz to 54.0 MHz
± 30
pp
m Standard
(± 10 ppm, ±15 ppm and ± 20 ppm Available)
Fre
uenc
Stabilit
Tolerance ± 50
pp
m Standard
(Operating Temperature Range, Referenced to 25°C Reading)
(± 10 ppm, ±15 ppm, ± 20 ppm, ± 30 ppm and ± 40 ppm Available)
-20°C to +70°C Standard
(-40°C to +85°C Available)
Stora
g
e Tem
p
erature Ran
g
e -40°C to +85°C
E
q
uivalent Series Resistance See ESR Table
Load Ca
p
acitance or Resonance Mode See Orderin
g
Information
Shunt Capacitance (C
0
)5.0
p
F Maximum
Drive Level 10
µ
W T
yp
ical
,
100
µ
W Maximum
A
g
in
g
@ 25°C ± 3
pp
m
/y
ear maximum
Reflow Condition
,
p
er JEDEC J-STD-020 +255°C ± 5°C
,
10 Seconds Maximum
Elect rical Pa ra met ers
Frequency Tolerance @ 25°C
Operating Temperature Range
EQUIVALENT SERIES RESISTANCE TABLE
FRE
Q
UENCY RANGE MODE of OSCILLATION ESR Maximum
16.00 MHz - 19.999 MHz Fundamental 100 Ohms
20.00 MHz - 29.999 MHz Fundamental 80 Ohms
30.00 MHz - 39.999 MHz Fundamental 80 Ohms
40.00 MHz - 54.000 MHz Fundamental 60 Ohms
MECHANICAL SPECIFICATIONS
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.
MARKING INFORMATION
1. XX.XX – Frequency in MHz.
2. C – CTS and Pin 1 identifier.
3. ** – Manufacturing Site Code.
4. 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.
SUGGESTED SOLDER PAD GEOMETRY
0.035 [0.90]
0.073 [1.85]
1
4
0.061 [1.55]
2
Inch
[mm]
Key:
3
0.039 [1.00]
PACKAGE DRAWING
0.064
( 1.625 )
0.029
( 0.725 ) 0.027
( 0.675 )
0.028
( 0.700 )
#2
Bottom View
Top View
21
43
( 0.65 ) MAX
( 2.50 ±0.10 )
0.098 ±0.004
0.026
( 2.00 ±0.10 )
0.079 ±0.004
Key: ( MM )
Inch
#2
#3#4
#1
XX.XX
C**D
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 ٠ ٠ ٠
Model 425
2.5x2.0mm Low Cost
Surface Mount Crystal
TAPE AND REEL INFORMATION
DIRECTION OF FEED
2.25
2.70 8.00
4.00Ø1 . 5 5
DIMENSIONS IN MILLIMETERS
4.00 1.75 1.55
Ø2 3
Ø178
Ø6 0
11.50
120°
Ø1 3
1.75
Device quantity is 3,000 pieces mimimum per 178mm reel.
ENVIRONMENTAL SPECIFICATIONS
Temperature Cycle: 400 cycles from –55°C to +125°C, 10 minute dwell at each temperature, 1 minute transfer time
between temperatures.
Mechanical Shock: 1,500g’s, 0.5mS duration, ½ sinewave, 3 shocks each direction along 3 mutually perpendicular
planes (18 total shocks).
Sinusoidal Vibration: 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).
Gross Leak: No leak shall appear while immersed in an FC40 or equivalent liquid at +125°C for 20 seconds.
Fine Leak: Mass spectrometer leak rates less than 2x10-8 ATM cc/sec air equivalent.
Resistance to Solder Heat: Product must survive 3 reflows of +260°C peak, 10 seconds maximum.
High Temperature Operating Bias: 2,000 hours at +125°C, disregarding frequency shift.
Frequency Aging: 1,000 hours at +85°C, maximum ±5 ppm shift.
Insulation Resistance: 500M Ohms @ 100VDC ±15VDC.
Moisture Sensitivity Level: Level 1 per JEDEC J-STD-020.
TABLE I
2001 2005 2009 2013 2017 A B C D E F G H J K L M
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
DEC
YEAR AUG SEP OCT NOVAPR MAY JUN JUL
MONTH JAN FEB MAR