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 0.5
µ
W max.
25-600kHz 1.0
µ
W max.
See Figure 4
-0.035ppm/°C
±5ppm max.
1,500g peak, 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
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 25°C 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 25°C
Calibration
Frequency Range (kHz)
18~74.9
75~169.9
170~249.9
250~600
Equivalent Circuit
L
1
R
1
A
B
C
1
C
0
±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 C
0
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*
@ 25°C
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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