CX MINIATURE CRYSTALS
9.6MHz
to 160MHz
MINIATURE AT-CUT
SMD
CRYSTAL
EUROQUARTZ
Telephone:
+44(0)1460 230000
Fax:
+44(0)1460 230001
Email: sales@euroquartz.co.uk
Web: www.euroquartz.co.uk
CX-2-SM
Page
1 of 2
General Description
The miniature CX-2-SM AT-cut crystals in leadless ceramic
packages have been designed for surface-mounting on printed
circuit boards or hybrid circuits. These crystal have a low profile
and a very small footprint. Manufactured by a photo-lithographic
process, the CX-2-SM is a robust crystal that has gained
widespread acceptance in the industry.
Surface-mount - infrared, vapour phase,
wave solder or epoxy mount techniques
Low profile, hermetically sealed package
Available with glass or ceramic lid
High shock and vibration resistance
Custom designs available
Full military environmental testing available
Specification
Frequency Range:
Calibration Tolerance*:
9.6MHz to 160MHz
A ±0.01% (±100ppm)
B ±0.1%
C ±1.0%
20pF (unless other required)
See table
See table
See table
See table
500
m
W max.
-10° to +70°C from ±10ppm
-40° to +85°C from ±20ppm
-55° to +125°C from ±30ppm
±5ppm max.
3000g 0.3ms, ½ sine
20g rms 10-2,000Hz random
-10°~+70°C (commercial)
-40°~+85°C (industrial)
-55°~+125°C (military)
-55°C~+125°C
260°C for 20 seconds
1
(TO P)
A
I
G
2
H
3 F
D
Load Capacitance:
Motional Resistance (R
):
Motional Capacitance (C
):
Quality Factor (Q):
Shunt Capacitance (C
):
Drive Level:
Temperature Stability**:
Ageing, first year:
Shock, survival***:
Vibration, survival:
Operating Temperature:
Storage Temperature:
Process Temperature:
Outline
B
C
E
Terminal 1 is electrically connected to terminal 3
CX-2-SM Package Dimensions
Dimension
Typical
(mm)
Maximum
(mm)
A
B
C
D
E
F
G
H
I
Dimension
C
6.60
2.39
-
0.89
1.50
1.27
2.67
3.94
5.33
Glass Lid
(mm max.)
6.99
2.74
see below
1.14
1.75
1.52
2.92
4.19
5.59
Ceramic Lid
(mm max.)
Specifications are typical at 25°C unless otherwise indicated.
Frequency stability characteristics follow that of AT-cut, thickness-
shear mode crystals.
*
**
**
Closer calibration available, as low as ±5ppm
Does not include calibration tolerance
A higher shock version is available, refer to data sheet for
the model CX-1HG
SM1
SM2
SM3
1.65
1.70
1.78
1.91
1.96
2.03
CX-2-SM Motional Parameters, Q and C
Motional
Motional
Capacitance
C
(fF)
Quality
Factor
000s
Shunt
Capacitance
C
(pF)
Frequency
Resistance
R
(
Equivalent Circuit
L
R
9
)
10.0MHz
1
C
C
2
60
20
50
2.8
7.8
0.5
95
36
41
1.4
2.4
3.2
32MHz
155MHz
L
Motional Inductance
C
Motional Capacitance C
Shunt Capacitance
R
Motional Resistance
CX MINIATURE CRYSTALS
9.6MHz
to 160MHz
MINIATURE AT-CUT
SMD
CRYSTAL
EUROQUARTZ
Telephone:
+44(0)1460 230000
Fax:
+44(0)1460 230001
Email: sales@euroquartz.co.uk
Web: www.euroquartz.co.uk
CX-2-SM
Page
2 of 2
Circuit Design
Conventional HCMOS Pierce Oscillator Circuit
R
B
Amplifier
Packaging
CX-1-SM - Bulk Pack (Standard)
- 16mm tape, 178mm or 330mm reels (Optional)
per EIA 481
- Tray Pack (Optional)
Buffer
Osc.
Freq. (Fo)
C
5
R
)
C
CX-2
C
Solder Pad Layout
2.67
2.87
1
2
0.6
Terminations
Designation
Termination
SM1
SM2
SM3
Gold Plated
Nickel, Silver Plated
Nickel, Solder Plated and Solder Dipped
Order Code
CX-2
O.T.=3rd O.T. Mode
Blank = Fundamental
Frequency
Total
Frequency
Tolerance
-SM1 32MHz
( A
Calibration
Tolerance*
@ 25°C
A, B, C
/ 25ppm / 50ppm / I
Frequency
Stability
over
Temperature
Range
)
S if special
C = Ceramic Lid
SM1
or custom design Blank = Glass Lid SM2
Blank if standard
SM3
Temperature
Range:
C = Commercial
I = Industrial
M = Military
S = Specify
*For other calibration tolerances
enter figure in ppm
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