CX MINIATURE CRYSTALS
16kHz to 600kHz MINIATURE SMD CRYSTAL FOR PIERCE OSCILLATORS
EURO QUARTZ
Telephone: +44(0)1460 230000 Fax: +44(0)1460 230001 Email: sales@euroquartz.co.uk Web: www.euroquartz.co.uk
CX-2V-SM CX-2V-SM
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General Description
The miniature CX-2V-SM quartz crystal is a high quality tuningfork resonator for use in Pierce (single inverter) oscillators. The CX2V-SM is hermetically sealed in a rugged, leadless ceramic package. The crystal has been designed for surface-mounting on printed circuit boards or hybrid circuits. The crystal is manufactured using a photo-lithographic process, yielding consistently high quality production parts.
Miniature tuning-fork design High shock resistance Designed for low-power applications Compatible with hybrid or PC board packaging Low ageing Full military environmental testing available Ideal for battery operated applications
Specification
Frequency Range: Calibration Tolerance*: Motional Resistance (R ): 16kHz to 600kHz A, B or C (see table) Figure 1 Max.: 16 ~ 169.9kHz, 2x typ. 170~600kHz, 2.5x typ. Figure 2 Figure 3 Min. is 0.25x typ. 2.0pF max. 16~24.98kHz 0.5µW max. 25~600kHz 1.0µW max. Figure 4 -0.035ppm/°C ±5ppm max. 1,500g 0.3ms, ½ sine 10g rms, 20-2,000Hz random -10°~+70°C (commercial) -40°~+85°C (industrial) -55°~+125°C (military) -55°C~+125°C 260°C for 20 seconds
1
(TOP)
A
I G
2 H 3F D
Outline
B C E Terminal 1 is electrically connected to terminal 3
Motional Capacitance (C ): Quality Factor (Q): Shunt Capacitance (C ): Drive Level: Turning Point (T )**: Temperature Coefficient: Ageing, first year: Shock, survival***: Vibration, survival***: Operating Temperature: Storage Temperature: Process Temperature:
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. * ** *** Tighter frequency calibration available Other turning point available Higher shock and vibration version available
CX-1V-SM Crystal Calibration Tolerance at 25°C
Calibration
SM1 SM2 SM3
1.65 1.70 1.78
1.91 1.96 2.03
Frequency Range (kHz) 16~74.9 75~169.9 170~249.9 250~600
A B C
±0.003% ±0.01% ±0.1%
±0.005% ±0.01% ±0.1%
±0.01% ±0.02% ±0.2%
±0.02% ±0.05% ±0.5%
Equivalent Circuit
L1 R1
1
C1 C0
2
Solder Pad Layout
2.67 2.87 1 2 0.6
R 1 Motional Resistance
L 1 Motional Inductance
C 1 Motional Capacitance C0 Shunt Capacitance
CX MINIATURE CRYSTALS
16kHz to 600kHz MINIATURE SMD CRYSTAL FOR PIERCE OSCILLATORS
EURO QUARTZ
Telephone: +44(0)1460 230000 Fax: +44(0)1460 230001 Email: sales@euroquartz.co.uk Web: www.euroquartz.co.uk
CX-2V-SM
Page 2 of 2
Figure 2 - CX-2V Typical Motional Capacitance (C )
5
Circuit Design
Conventional HCMOS Pierce Oscillator Circuit
Rf Amplifier
C1 (fF)
2 1.0
0.5
Buffer Osc. Freq. (Fo)
16
50
100 200
600
Frequency (kHz)
CS
RA
Figure 3 - CX-2V Typical Quality Factor (Q)
300
200
C1
CX-2
C2
100
in '000s
Figure 1 - CX-2V Typical Motional Resistance (R )
300 200 100 50 R1 (k
50
20 16 50 100 200 600
Frequency
(kH z)
9)
20 10
Figure 4 - CX-2V Typical Turning Point Temp. (°C)
+80 +70 +60
5
2 16 50 100 200 600 Frequency (kHz)
+50 +40 To(°C) +30 +20 + 10 0 - 10 -20 18 50 100 200 600
Frequency (kHz)
Terminations Packaging
CX-2V-SM - Bulk Pack (Standard) - 16mm tape, 178mm or 330mm reels (Optional) per EIA 481 - Tray Pack (Optional)
Designation Termination
SM1 SM2 SM3
Gold Plated Nickel, Solder Plated Nickel, Solder Plated and Solder Dipped
Order Code
CX-2V
C = Ceramic Lid Blank = Glass Lid Frequency
-SM1 32.768kHz
SM1 SM2 SM3
(A
/
I
)
“S” if special or custom design Blank if standard
Calibration Tolerance* @ 25°C A, B, C *For other calibration tolerances enter figure in ppm
Temperature Range: C = Commercial I = Industrial M = Military S = Specify
