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CX MINIATURE CRYSTALS
8MHz to 160MHz MINIATURE AT-CUT SMD CRYSTAL HIGH SHOCK
EUROQUARTZ
Telephone: +44(0)1460 230000 Fax: +44(0)1460 230001 Email: sales@euroquartz.co.uk Web: www.euroquartz.co.uk
CX-1HG-SM
Page 1 of 2
General Description
The miniature CX-1HG-SM AT-cut crystals in leadless ceramic packages have been designed for surface-mounting on printed circuit boards or hybrid circuits. These crystals are designed for applications requiring exceptional shock and vibration survival.

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
D
(TO P)
Frequency Range: Calibration Tolerance*: 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:
A E D
B
C
E
Outline CX-1-SM Package Dimensions
Dimension Typical (mm) Maximum (mm)
8MHz 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.
10,000g 0.2ms, 1/2 sine 50g rms 10-2,000Hz random
A B C D E
Dimension C
8.00 3.56 1.14 1.52
Glass Lid (mm max.)
8.38 3.94 see below 1.40 1.78
Ceramic Lid (mm max.)
-10~+70C (commercial) -40~+85C (industrial) -55~+125C (military) -55C~+125C 260C for 20 seconds
Specifications are typical at 25C unless otherwise indicated. The characteristics of the frequency stability parameter follow that of AT-cut, thickness-shear mode crystals. * ** Closer calibration available, as low as 5ppm Does not include calibration tolerance
SM1 SM2 SM3
1.65 1.70 1.78
1.78 1.83 1.90 CX-1 Motional Parameters, Q and C
Motional Frequency Resistance R ( Motional Capacitance C (fF) Quality Factor 000s Shunt Capacitance C (pF)
Equivalent Circuit
L R
1
C C
2
9)
10.0MHz 32MHz 155MHz
50 20 50
5.5 7.8 0.5
80 36 41
2.2 2.6 3.2
R Motional Resistance
L Motional Inductance
C Motional Capacitance C Shunt Capacitance
CX MINIATURE CRYSTALS
8MHz to 160MHz MINIATURE AT-CUT SMD CRYSTAL HIGH SHOCK
EUROQUARTZ
Telephone: +44(0)1460 230000 Fax: +44(0)1460 230001 Email: sales@euroquartz.co.uk Web: www.euroquartz.co.uk
CX-1HG-SM
Page 2 of 2
Circuit Design
Designation Termination
Terminations
Typical HCMOS Pierce Oscillator
A conventional HCMOS Pierce oscillator is shown below. The crystal oscillates at a frequency fO above the crystal's seriesresonant frequency. The crystal is effectively inductive and in combination with RF, C1 and C2 in the feedback loop, provides approximately 180 of the phase shift necessary to ensure oscillation.
SM1 SM2 SM3
Gold Plated Nickel, Solder Plated Nickel, Solder Plated and Solder Dipped
Packaging
CX-1-SM - Bulk Pack (Standard) - 16mm tape, 178mm or 330mm reels (Optional) per EIA 481 - Tray Pack (Optional)
Conventional HCMOS Pierce Oscillator Circuit
RB Amplifier
Buffer Osc. Freq. (Fo)
C5
R)
Suggested Solder Pad Layout
C CX-1 C
1.78 4.06 6.86
Order Code
CX-1
O.T.=3rd O.T. Mode Blank = Fundamental Frequency
Total Frequency Tolerance
HG
SM1 32MHz
(A
Calibration Tolerance* @ 25C A, B, C
/ 25ppm / 50ppm / I
Frequency Stability over Temperature Range
)
"S" if special or custom design Blank if standard
SM1 C = Ceramic Lid Blank = Glass Lid SM2 SM3
*For other calibration tolerances enter figure in ppm
Temperature Range: C = Commercial I = Industrial M = Military S = Specify

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