CX MINIATURE CRYSTALS
8MHz
to 160MHz
MINIATURE AT-CUT
QUARTZ
CRYSTAL
EUROQUARTZ
Telephone:
+44(0)1460 230000
Fax:
+44(0)1460 230001
Email: sales@euroquartz.co.uk
Web: www.euroquartz.co.uk
CX-1-03
Page
1 of 2
General Description
The CX-1 quartz crystal is a high quality miniature AT-cut
resonator. The CX-1 is hermetically sealed in a rugged, miniature
ceramic package, a quarter of the size of an eight pin dual-in-line
package. The crystal is manufactured utilizing a photo-lithographic
process, ensuring consistency and repeatability of electrical
characteristics.
0.7
Low-profile hermetically sealed package
Excellent ageing characteristics
Fundamental or 3rd Overtone mode
High shock resistance
Full military environmental testing available
Specification
8MHz to 160MHz
A ±0.01% (±100ppm)
B ±0.1%
C ±1.0%
20pF (unless other required)
Load Capacitance:
See table
Motional Resistance (R
):
See table
Motional Capacitance (C
):
See table
Quality Factor (Q):
See table
Shunt Capacitance (C
):
500
m
W max.
Drive Level:
-10° to +70°C (Commercial)
Temperature Stability**:
-40° to +85°C (Industrial)
-55° to +125°C (Military)
±5ppm max.
Ageing, first year:
3000g 0.3ms, ½ sine
Shock, survival***:
20g rms 10-2,000Hz random
Vibration, survival:
-10°~+70°C (commercial)
Operating Temperature:
-40°~+85°C (industrial)
-55°~+125°C (military)
-55°C~+125°C
Storage Temperature:
Lead to Package temp. not to
Process Temperature:
exceed 175°C
Glass lid to package seal rim
temp. not to exceed 210°C
Specifications are typical at 25°C 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
**
A higher shock version is available, refer to data sheet for
the model CX-1HG
Frequency Range:
Calibration Tolerance*:
7.6
8.1
2.0
3.8
3.8
Outline and Dimensions
Equivalent Circuit
L
R
1
C
C
2
L
Motional Inductance
C
Motional Capacitance C
Shunt Capacitance
R
Motional Resistance
Standard Frequencies (MHz)
10.0
11.0592
12.0
14.318
16.0
19.6608
20.0
24.0
24.576
30.0
32.0
35.2512
36.0
40.0
CX-1 Motional Parameters, Q and C
Motional
Frequency
Resistance
R
(
Motional
Capacitance
C
(fF)
Quality
Factor
000s
Shunt
Capacitance
C
(pF)
9
)
10.0MHz
32MHz
155MHz
50
20
50
5.5
7.8
0.5
80
36
41
2.2
2.6
3.2
CX MINIATURE CRYSTALS
8MHz
to 160MHz
MINIATURE AT-CUT
QUARTZ
CRYSTAL
EUROQUARTZ
Telephone:
+44(0)1460 230000
Fax:
+44(0)1460 230001
Email: sales@euroquartz.co.uk
Web: www.euroquartz.co.uk
CX-1-03
Page
2 of 2
Circuit Design
Typical HCMOS Pierce Oscillator
A conventional HCMOS Pierce oscillator is shown below. The
crystal oscillates at a frequency f above the crystals series-
resonant frequency. The crystal is effectively inductive and in
combination with R , C and C in the feedback loop, provides
approximately 180° of the phase shift necessary to ensure
oscillation.
O
F
1
2
Conventional HCMOS Pierce Oscillator Circuit
R
B
Amplifier
Buffer
Osc.
Freq. (Fo)
C
5
R
)
C
CX-1
C
Packaging
CX-1-03 -Bulk Pack (Standard)
Tray Pack (Optional)
Order Code
CX-1
O.T.=3rd O.T. Mode
Blank = Fundamental
Frequency
Total
Frequency
Tolerance
-03
32MHz
( A
Calibration
Tolerance*
@ 25°C
A, B, C
/ 25ppm / 50ppm / I
Frequency
Stability
over
Temperature
Range
)
Side leads
“S” if special
C = Ceramic Lid
or custom design
Blank = Glass Lid
Blank if standard
*For other calibration tolerances
enter figure in ppm
Temperature
Range:
C = Commercial
I = Industrial
M = Military
S = Specify
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