CX MINIATURE CRYSTALS
16kHz
to 600kHz
MINIATURE SMD CRYSTAL
FOR PIERCE OSCILLATORS
EUROQUARTZ
Telephone:
+44(0)1460 230000
Fax:
+44(0)1460 230001
Email: sales@euroquartz.co.uk
Web: www.euroquartz.co.uk
CX-2V-SM
Page
1 of 2
General Description
The miniature CX-2V-SM quartz crystal is a high quality tuning-
fork resonator for use in Pierce (single inverter) oscillators. The CX-
2V-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 0.5
µ
W max.
25~600kHz 1.0
µ
W 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
3 F
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
L
1
R
1
1
C
1
C
0
2
Solder Pad Layout
2.67
2.87
1
2
0.6
L
1
Motional Inductance
C
1
Motional Capacitance C
0
Shunt Capacitance
R
1
Motional Resistance
CX MINIATURE CRYSTALS
16kHz
to 600kHz
MINIATURE SMD CRYSTAL
FOR PIERCE OSCILLATORS
EUROQUARTZ
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
R
f
Amplifier
C1
(fF)
2
1.0
0.5
Buffer
Osc.
Freq. (Fo)
16
50
100 200
600
Frequency (kHz)
C
S
R
A
Figure 3 - CX-2V Typical Quality Factor (Q)
300
200
C
1
CX-2
C
2
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
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