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CX MINIATURE CRYSTALS
18kHz to 600kHz MINIATURE SMD CRYSTAL FOR SERIES OSCILLATORS
EUROQUARTZ
Telephone: +44(0)1460 230000 Fax: +44(0)1460 230001 Email: sales@euroquartz.co.uk Web: www.euroquartz.co.uk
CX-3H-SM
Page 1 of 2
General Description
The CX-3H-SM quartz crystals are leadless devices designed for surface-mounting on printed circuit boards or hybrid circuits. These miniature crystals are intended for use with series oscillators. Hermetically sealed in a rugged, ceramic package, the crystals are produced utilizing a photo-lithographic process giving excellent repeatability and consistent high quality.

Miniature tuning fork design High shock resistance Designed for low power applications Compatible with hybrid or PCB mounting Low ageing Full military environmental testing available Ideal for battery operated applications
Specification
Frequency Range: Functional Mode: Calibration Tolerance*: Motional Resistance (R): Motional Capacitance (C): Quality Factor (Q): Shunt Capacitance (C): Drive Level: Turning Point (T)**: Temperature Coefficient: Ageing, first year: Shock***: Vibration, survival: Operating Temperature: Storage Temperature: Max. Process Temperature: 18kHz to 600kHz Tuning Fork (Flexure) A, B, or C (see below) See Figure 1 Max: 18-25kHz, 2 x typ. 25-600kHz, 2.5 x typ. See Figure 2 See Figure 3 min. is 0.25 x typ. 1.8pF max. 18-25kHz 0.5W max. 25-600kHz 1.0W max. See Figure 4 -0.035ppm/C 5ppm max. 1,500g peak, 0.3ms, 1/2 sine 10g rms 20-2,000Hz random -10~+70C (commercial) -40~+85C (industrial) -55~+125C (military) -55C~+125C 260C for 20 seconds
D
(TOP)
A D D
B
C
E
Outline CX-3H-SM Package Dimensions
Dimension Typical (mm) Maximum (mm)
A B C D E
Dimension "C"
6.73 2.62 1.27 1.32
Glass Lid (mm max.)
7.11 2.90 see below 1.52 1.57
Ceramic Lid (mm max.)
Specifications are typical at 25C unless otherwise indicated. * ** *** Closer frequency calibration available Other turning point available A higher shock and vibration version is available.
SM1 SM2 SM3
1.47 1.52 1.60
1.75 1.80 1.88
CX-3V Crystal Calibration Tolerance at 25C
Calibration
Frequency Range (kHz) 18~74.9 75~169.9 170~249.9 250~600
Equivalent Circuit
L1 R1
A B
C1 C0
0.003% 0.01% 0.1%
0.005% 0.01% 0.1%
0.01% 0.02% 0.2%
0.02% 0.05% 0.5%
1
2
C
Terminations
Designation Termination
L 1 Motional Inductance C 1 Motional Capacitance C0 Shunt Capacitance
R 1 Motional Resistance
SM1 SM2 SM3
Gold Plated Nickel, Silver Plated Nickel, Solder Plated and Solder Dipped
CX MINIATURE CRYSTALS
18kHz to 600kHz MINIATURE SMD CRYSTAL FOR SERIES OSCILLATORS
EUROQUARTZ
Telephone: +44(0)1460 230000 Fax: +44(0)1460 230001 Email: sales@euroquartz.co.uk Web: www.euroquartz.co.uk
CX-3H-SM
Page 2 of 2
Figure 2 - CX-3H Typical Motional Capacitance (C)
5
Circuit Design
Conventional Series Oscillator Circuit
C1 (fF)
2 1.0
0.5 18 50 100 200 600 Frequency (kHz)
Figure 3 - CX-3H Typical Quality Factor (Q)
Oscillator Buffer
50
20
CX-1H Crystal
10 in '000s
5
Figure 1 - CX-3H Typical Motional Resistance (R)
2
1000 500
18
50
1 00 200
600
Frequency (kH z)
200 R1 (k 100
Figure 4 - CX-3H Typical Turning Point Temp. (C)
+80 +70 +60 +50
9)
50
20 10 18 50 100 200 600 Frequency (kHz)
+40 To(C) +30 +20 + 10 0 - 10 -20 18 50 100 200 600
Frequency (kHz)
Solder Pad Layout
1.78 3.05 5.46
Packaging
CX-3H-SM- Bulk Pack (Standard) - 16mm tape, 178mm or 330mm reels (Optional) per EIA 481 - Tray Pack (Optional)
Order Code
CX-3H
C = Ceramic Lid Blank = Glass Lid Frequency
-SM1 32.768kHz ( A
SM1 SM2 SM3 Calibration Tolerance* @ 25C A, B, C *For other calibration tolerances enter figure in ppm
/
I
)
"S" if special or custom design Blank if standard
Temperature Range: C = Commercial I = Industrial M = Military S = Specify

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