Model 425
2.5x2.0mm Low Cost
Surface Mount Crystal
ELECTRICAL CHARACTERISTICS
PARAMETER
Operating Mode
Crystal Cut
VALUE
Fundamental
AT-Cut
Frequency Range
16.0 MHz to 54.0 MHz
± 30 ppm Standard
(± 10 ppm, ±15 ppm and ± 20 ppm Available)
Frequency Tolerance @ 25°C
Frequency Stability Tolerance
± 50 ppm 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)
Operating Temperature Range
Storage Temperature Range
Equivalent Series Resistance
Load Capacitance or Resonance Mode
Shunt Capacitance (C0)
Drive Level
-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
Aging @ 25°C
Reflow Condition, per JEDEC J-STD-020
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 ESR Maximum
Fundamental
Fundamental
Fundamental
Fundamental
100 Ohms
80 Ohms
80 Ohms
60 Ohms
MECHANICAL SPECIFICATIONS
PACKAGE DRAWING
( 2.50 ±0.10 )
MARKING INFORMATION
0.098 ±0.004
1. XX.XX – Frequency in MHz.
Top View
#4
#3
2. C – CTS and Pin 1 identifier.
3. ** – Manufacturing Site Code.
4. D – Manufactured Date Code. See Table I for
codes.
( 2.00 ±0.10 )
XX.XX
0.079 ±0.004
5. Complete CTS part number, frequency value and
date code information must appear on reel and
box labels.
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]
0.035 [0.90]
1
2
( 0.700 )
0.028
4
1
3
2
Bottom View
4
3
0.061 [1.55]
( MM )
Inch
Key:
( 1.625 )
0.064
Notes:
[mm]
Key:
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.
0.073 [1.85]
Inch
Document No. 008-0332-0
Page 2 - 3
Rev. B
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CTS Electronic Components, Inc. ٠
171 Covington Drive ٠
Bloomingdale, IL 60108 ٠
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