CX-1-SM
8MHz to 160MHz
MINIATURE AT-CUT
SMD CRYSTAL
CX-1-SM
8MHz to 160MHz
MINIATURE AT-CUT
SMD CRYSTAL
General Description
The miniature CX-1-SM crystals in leadless ceramic packages have
been designed for surface-mounting on printed circuit boards or
hybrid circuits. It is a robust crystal that has gained widespread
acceptance in the industry.
Outline
A
BC
D
E
D
E
(TOP)
!
!
!
!
!
!
Surface-mount - infrared, vapour phase,
wave solder or epoxy mount techniques
Low profile, hermetically sealed package
Available with glass or ceramic lid
High shock and vibration resistance
Custom designs available
Full military environmental testing available
Specification
Dimension
A 8.00 8.38
B 3.56 3.94
C - see below
D 1.14 1.40
E 1.52 1.78
CX-1-SM Package Dimensions
Typical
(mm) Maximum
(mm)
Dimension
C
SM1 1.65 1.78
SM2 1.70 1.83
SM3 1.78 1.90
Glass Lid
(mm max.) Ceramic Lid
(mm max.)
1
LR
C
C
0
11
12
R
1
L
1
1
CC
0
Mot ional Resistance
Motional Capacitance
Mot ional Induct ance
Shunt Capacitance
Equivalent Circuit
Frequency Range:
Calibration Tolerance*:
Load Capacitance:
Motional Resistance (R ):
Motional Capacitance (C ):
Quality Factor (Q):
Shunt Capacitance (C ):
Drive Level:
Temperature Stability**:
Ageing, first year:
Shock, survival***:
Vibration, survival:
Operating Temperature:
Storage Temperature:
Process Temperature:
8MHz to 160MHz
A ±0.01% (±100ppm)
B ±0.1%
C ±1.0%
20pF (unless other required)
See table
See table
See table
See table
500 W max.
-10° to +70°C from ±10ppm
-40° to +85°C from ±20ppm
-55° to +125°C from ±30ppm
±5ppm max.
3000g 0.3ms, ½ sine
20g rms 10-2,000Hz random
-10°~+70°C (commercial)
-40°~+85°C (industrial)
-55°~+125°C (military)
-55°C~+125°C
260°C for 20 seconds
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
1
1
0
m
Frequency
10.0MHz 50 5.5 80 2.2
32MHz 20 7.8 36 2.6
155MHz 50 0.5 41 3.2
CX-1 Motional Parameters, Q and C
0
Motional
Resistance
R()
1
W
Motional
Capacitance
C (fF)
1
Quality
Factor
000s
Shunt
Capacitance
C (pF)
0
+44(0)1460 230000
+44(0)1460 230001
sales@euroquartz.co.uk
www.euroquartz.co.uk
Telephone:
Fax:
Email:
Web:
EUROQUARTZ
CX MINIATURE CRYSTALS
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Typical HCMOS Pierce Oscillator
A conventional HCMOS Pierce oscillator is shown below. The
crystal oscillates at a frequency f above the crystal’s 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
F1 2
Order Code
CX-1
“S” if special
or custom design
Blank if standard
Frequency
SM1
SM2
SM3
Calibration
Tolerance*
@ 25°C
A, B, C
32MHz
SM1
Circuit Design
Conventional HCMOS Pierce Oscillator Circuit
CX-1
Buffer
Amplifier
Osc.
Freq. (Fo)
C
1
C
2
C
S
R
f
R
A
CX-1-SM - Bulk Pack (Standard)
- 16mm tape, 178mm or 330mm reels (Optional)
per EIA 481
- Tray Pack (Optional)
Packaging
Temperature
Range:
C = Commercial
I = Industrial
M = Military
S = Specify
( A / 25ppm / 50ppm / I )
O.T.=3rd O.T. Mode
Blank = Fundamental
C = Ceramic Lid
Blank = Glass Lid
Frequency
Stability
over
Temperature
Range
Total
Frequency
Tolerance
*For other calibration tolerances
enter figure in ppm
Terminations
Designation
SM1 Gold Plated
SM2 Nickel, Silver Plated
SM3 Nickel, Solder Plated and Solder Dipped
Termination
1.78
4.06
6.86
Suggested Solder Pad Layout
CX-1-SM
8MHz to 160MHz
MINIATURE AT-CUT
SMD CRYSTAL
CX-1-SM
8MHz to 160MHz
MINIATURE AT-CUT
SMD CRYSTAL
+44(0)1460 230000
+44(0)1460 230001
sales@euroquartz.co.uk
www.euroquartz.co.uk
Telephone:
Fax:
Email:
Web:
EUROQUARTZ
CX MINIATURE CRYSTALS
Page
2of2
