CX MINIATURE CRYSTALS
1 of 2
10kHz
to 600kHz
MINIATURE QUARTZ 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
Page
General Description
The CX-2V quartz crystal is a high quality tuning fork resonator
designed for use in Pierce (single inverter) oscillators. The CX-2V is
hermetically sealed in a rugged, miniature ceramic package, a
quarter 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.
Miniature tuning-fork design
High shock resistance
Designed for low-power applications
Compatible with hybrid or PCB packaging
Low ageing
Full military environmental testing available
Specification
-02 End Lead
2.39
1
2
3
5.21
A
1.27
Shunt Capacitance (C
):
Drive Level:
Turning Point (T
)**:
Temperature Coefficient (k):
Ageing, first year:
Shock, survival***:
Vibration, survival***:
Operating Temperature:
Storage Temperature:
Process Temperature:
-03 Side Lead
6.60
2.39 1
2
-04 Side Lead
6.60
3
3
1
2
Frequency Range:
Functional Mode:
Calibration Tolerance*:
Motional Resistance (R
):
Motional Capacitance (C
):
Quality Factor (Q):
6.60
5.33
5.08
2.54
Outline and Dimensions
Notes:
1. Terminal 1 is electrically connected to terminal 3.
2. Lead Dimensions: width 0.33mm typical, thickness 0.18mm.
3. A = Glass Lid - 2.03mm max.
Ceramic Lid - 2.41mm max.
Equivalent Circuit
L
1
R
1
1
C
1
C
0
2
10kHz to 600kHz
Tuning Fork (Flexure)
A, B, or C
(see table below)
Figure 1
2x Typ. @ 16~24.9kHz
2.5x Typ. @25~600kHz
Figure 2
Figure 3
(Minimum is 0.25x Typ.)
2.0pF max.
0.5
µ
W max. @ 16~24.9kHz
1.0
µ
W max. @ 25~600kHz
Figure 4
-0.035ppm/°C
±5ppm max.
1,000g 1ms, ½ sine
10g rms 20 - 2,000Hz
-10°~+70°C (commercial)
-40°~+85°C (industrial)
-55°~+125°C (military)
-55°C~+125°C
Lead to Package temp. not to
exceed 175°C
Glass lid to package seal rim
temp. not to exceed 210°C
Specifications are typical at 25°C unless otherwise indicated.
*
Closer calibration available
**
Other turning point available
L
1
Motional Inductance
C
1
Motional Capacitance C
0
Shunt Capacitance
R
1
Motional Resistance
CX-2V Crystal Calibration Tolerance at 25°C
Calibration
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%
CX MINIATURE CRYSTALS
10kHz
to 600kHz
MINIATURE QUARTZ 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
Page
2 of 2
Figure 1 - CX-2V Typical Motional Resistance (R
)
Package Handling
The CX crystal is hermetically sealed in a ceramic package.
Normal handling and soldering precautions for small, low thermal
mass parts are adequate when installing or testing CX crystals.
The crystals may be wave soldered, taking proper precautions to
avoid desoldering the leads. A slow machine rate or too high a
pre-heat temperature or solder bath temperature can damage the
crystals. Lead to package solder interface temperature should not
exceed 175°C, and glass lid to package seal rim temperature
should not exceed 210°C. Should the seal rim temperature exceed
these limits the package may lose its hermeticity. Loss of
hermeticity results in a decrease of frequency and increase in
motional resistance.
(k
Ω
)
50
R1
300
200
100
20
10
5
2
16
50
100 200
600
Frequency (kHz)
Figure 2 - CX-2V Typical Motional Capacitance (C
)
5
Conventional HCMOS Pierce Oscillator Circuit
C1
2
1.0
R
f
Amplifier
(fF)
Buffer
0.5
C
S
R
A
Osc.
Freq. (Fo)
16
50
100 200
600
Frequency (kHz)
Figure 3 - CX-2V Typical Quality Factor (Q)
C
1
CX-2
C
2
300
200
100
in '000s
50
Packaging
CX-2V -
Bulk Pack (Standard)
Tray Pack (Optional)
20
16
50
100
200
600
Frequency (kH
z)
Order Code
Frequency
Figure 4 - CX-2V Typical Turning Point Temp. (°C)
+80
+70
+60
+50
+40
To(°C) +30
CX-2V
-03 32.768kHz (A / I)
Calibration
Tolerance*
@ 25°C
(A)
(B)
(C)
*For other
calibrations
insert value
in ppm
Temperature
Range:
C = Commercial
I = Industrial
M = Military
S = Specify
+20
+ 10
0
Leads
“S” if special
02
or custom design
03
Blank if standard
04
- 10
-20
16
50
100 200
600
Frequency (kHz)
f-fo k(T-To)
=
fo
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