CX MINIATURE CRYSTALS
9.6MHz
to 160MHz
LOW-PROFILE
MINIATURE AT-CUT
SMD
CRYSTAL
EUROQUARTZ
Telephone:
+44(0)1460 230000
Fax:
+44(0)1460 230001
Email: sales@euroquartz.co.uk
Web: www.euroquartz.co.uk
CX-3-SM
Page
1 of 2
General Description
CX-3-SM AT-cut crystals are leadless devices designed for surface-
mounting on printed circuit boards or hybrid circuits. The crystals
are low profile with a very small land area.
Designed for surface-mount applications using
infrared, vapour phase, wave solder or epoxy
mount techniques
Ideal for use with microprocessors
Designed for low power applications
Compatible with hybrid or PCB mounting
Low ageing
Full military environmental testing available
Custom designs available
Specification
D
(TO P)
A
D
D
B
C
E
Outline
CX-3-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.)
9.6MHz to 160MHz
A: ±0.01% (±100ppm)
B: ±0.1%
C: ±1.0%
20pF (unless other specified)
Load Capacitance:
see table below
Motional Resistance (R
):
see table below
Motional Capacitance (C
):
see table below
Quality Factor (Q):
see table below
Shunt Capacitance (C
):
500
m
W max.
Drive Level:
-10° to +70°C from ±10ppm
Frequency Stability Temp**:
-40° to +85°C from ±20ppm
-55° to +125°C from ±30ppm
±5ppm max.
Ageing, first year:
3,000g peak, 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:
260°C for 20 seconds
Max. Process Temperature:
Note: temperature stability characteristics follow thos of AT-cut
thickness-shear mode.
Frequency Range:
Calibration Tolerance*:
SM1
SM2
SM3
1.47
1.52
1.60
1.75
1.80
1.88
Specifications are typical at 25°C unless otherwise indicated.
*
Closer frequency calibration available
**
Other turning point available
*** Higher shock version available
CX-3-SM Motional Parameters, Q and C
Equivalent Circuit
L
R
1
C
C
Motional
Motional
Capacitance
C
(fF)
Quality
Factor
000s
Shunt
Capacitance
C
(pF)
2
Frequency
Resistance
R
(
9
)
10.0MHz
32MHz
155MHz
60
20
50
2.8
7.8
0.5
95
36
41
1.4
2.4
3.2
L
Motional Inductance
C
Motional Capacitance C
Shunt Capacitance
R
Motional Resistance
CX MINIATURE CRYSTALS
9.6MHz
to 160MHz
LOW-PROFILE
MINIATURE AT-CUT
SMD
CRYSTAL
EUROQUARTZ
Telephone:
+44(0)1460 230000
Fax:
+44(0)1460 230001
Email: sales@euroquartz.co.uk
Web: www.euroquartz.co.uk
CX-3-SM
Page
2 of 2
Circuit Design
Conventional HCMOS Pierce Oscillator Circuit
R
B
Amplifier
Buffer
Osc.
Freq. (Fo)
C
5
R
)
C
CX-2
C
Solder Pad Layout
1.78
3.05
5.46
Terminations
Packaging
CX-3H-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, Silver Plated
Nickel, Solder Plated and Solder Dipped
Order Code
CX-3
O.T.=3rd O.T. Mode
Blank = Fundamental
Frequency
Total
Frequency
Tolerance
-SM1 32MHz
SM1
SM2
SM3
( A
Calibration
Tolerance*
@ 25°C
A, B, C
/ 25ppm / 50ppm / I
Frequency
Stability
over
Temperature
Range
)
“S” if special
or custom design
Blank if standard
C = Ceramic Lid
Blank = Glass Lid
*For other calibration tolerances
enter figure in ppm
Temperature
Range:
C = Commercial
I = Industrial
M = Military
S = Specify
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