CX-2-SM Datasheet, PDF (1/2 Pages) EUROQUARTZ limited – CX MINIATURE CRYSTALS

CX MINIATURE CRYSTALS
CX-2-SM
760kHz to 1.35MHz
LOW-PROFILE
SMD CRYSTAL
Page
1 of 2
EURO QUARTZ
Telephone: [phone]
Fax: [phone]
Email: [e-mail]
Web: www.euroquartz.co.uk
General Description
The miniature CX-2-SM quartz crystal is a high quality leadless
device suitable for mounting on printed circuit boards or hybrid
substrates. The CX-2-SM is hermetically sealed in a rugged,
leadless ceramic package. The crystal has been designed for
surface-mounting on printed circuit boards or hybrid circuits. The
crystal is manufactured using a photo-lithographic process,
yielding consistently high quality production parts.
1
A ^{(TO P)}
I
2
G
H
3F
B
C
D
E
Terminal 1 is electrically connected to terminal 3
Outline
CX-2-SM Package Dimensions
Dimension
Typical
(mm)
Maximum
(mm)
A
6.60
6.99
B
2.39
2.74
C
-
see below
D
0.89
1.14
E
1.50
1.75
F
1.27
1.52
G
2.67
2.92
H
3.94
4.19
I
5.33
5.59
Dimension Glass Lid Ceramic Lid
“C”
(mm max.) (mm max.)
SM1
SM2
SM3
1.65
1.70
1.78
1.91
1.96
2.03
Equivalent Circuit
1
L
C
R
2
C
R Motional Resistance L Motional Inductance
C Motional Capacitance C Shunt Capacitance
 Extensional mode
 High shock resistance
 Designed for low-power applications
 Compatible with hybrid or PC board packaging
 Low ageing
 Full military environmental testing available
 Ideal for battery operated applications
Specification
Frequency Range:
760kHz to 1.35MHz
Functional Mode:
Extensional
Calibration Tolerance*:
A ±0.05% (±500ppm)
B ±0.1%
C ±1.0%
Load Capacitance:
Motional Resistance (R):
7pF
5kW max.
Motional Capacitance (C):
1.2fF
Quality Factor (Q):
150k
Shunt Capacitance (C):
Drive Level:
1.0pF
3mW max.
Turning Point (T)**:
35°C
Note: Frequency (f) deviation from frequency (f₀) @ turning point
temperature (T₀):
f-fo
fo
=
k(T-To)
Temperature Coefficient:
-0.035ppm/°C²
Ageing, first year:
±5ppm max.
Shock, survival:
1000g 0.3ms, ½ sine
Vibration, survival:
10g rms, 20-1,000Hz random
Operating Temperature:
-10°~+70°C (commercial)
-40°~+85°C (industrial)
-55°~+125°C (military)
Storage Temperature:
-55°C~+125°C
Process Temperature:
260°C for 20 seconds
Specifications are typical at 25°C unless otherwise indicated.
*
Tighter frequency calibration available
**
Other turning point available
Solder Pad Layout
2.67
2.87 1 2
0.6