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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 500mW max. -10 to +70C from 10ppm -40 to +85C from 20ppm -55 to +125C from 30ppm 5ppm max. 3000g 0.3ms, 1/2 sine 20g rms 10-2,000Hz random -10~+70C (commercial) -40~+85C (industrial) -55~+125C (military) -55C~+125C 260C for 20 seconds
1
(TO P)
A
I G
2 H 3F D E
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:
B
C
Outline
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 25C unless otherwise indicated. Frequency stability characteristics follow that of AT-cut, thicknessshear 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
R Motional Resistance
L Motional Inductance
C Motional Capacitance C Shunt Capacitance
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
RB 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)
C5
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* @ 25C 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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