EURO
QUARTZ
Ultra-Miniature SMD AT-Cut Crystal
FEATURES
Ultra-miniature, low profile (>1.2mm) ceramic package
Available with glass or cermic lid
Excellent ageing characteristics
High shock and vibration resistance
Full military testing available
CX4SM AT CRYSTAL
14MHz to 250MHz
OUTLINE & DIMENSIONS
DESCRIPTION
CX4SM AT crystals provide a reliable and rugged source of high
frequencies in an ultra-miniature package.
SPECIFICATION
Specifications stated are typical at 25°C unless otherwise indicated.
Specifications may change without notice.
Standard Calibration Tolerance
1
: ±100ppm, or tighter as required
Load Capacitance:
10pF
Drive Level:
200µW max. for Fr. <50MHz
100µW max. for Fr. >50MHz
Frequency Stability
1,3
-10° to +70°C:
±50ppm to ±10ppm
-40° to +85°C:
±100ppm to ±20ppm
-55° to +125°C:
±100ppm to ±30ppm
3
:
Ageing First Year
±5ppm max.
(Better than ±1ppm
available)
4
:
Shock, Survival
5000g, 0.3ms, ½ sine
Vibration, Survival
5
:
10g rms, 10~2000Hz swept sine
Operating Temperature Range:
-10°C to +70°C (Commercial)
-40°C to +85°C (Industrial)
-55°C to +125°C (Military)
Storage Temperature Range:
-55° to +125°C
Maximum Process Temperature:
+260°C for 20 seconds
1.
2.
3.
4.
5.
Other tolerances available; contact Euroquartz sales.
Does not include calibration tolerance. Frequency stability
characteristics follow that of the AT thickness-shear mode.
±5ppm max. for frequencies below 40MHz. For tighter
tolerances contact Euroquartz sales.
Higher shock verion available.
Per MIL-STD-202G, Method 204D, Condition D. Random
Random testing also available.
Dim. H
SM1
SM2
SM3
SM4
SM5
Glass
Lid
1.14
1.17
1.22
1.17
1.22
Ceramic
Lid
1.27
1.30
1.35
1.30
1.35
PACKAGING OPTIONS
CX4SM AT crystals are available either tray packed (<250pcs) or tape
and reel (>250 pieces).
16mm tape, 178mm or 330mm reels (EIA 418).
TERMINATIONS - PLATING
Designation
Termination
SM1
SM2
SM3
SM4
SM5
Gold Plated (Lead Free)
Solder Plated
Solder Dipped
Solder Plated (Lead Free)
Solder Dipped (Lead Free)
FREQUENCY-DEPENDENT SPECIFICATION TABLE
Fundamental Frequency
Motional Resistance R1 (Ω):
Motional Capacitance C1 (Ff):
Quality Factor Q (k):
Shunt Capacitance (C0 (pF):
14.745MHz
60
1.4
120
0.8
16MHz
75
1.5
90
0.9
20MHz
50
1.4
110
0.9
32MHz
30
2.5
70
1.1
40MHz
30
1.5
90
1.0
80MHz
30
1.8
40
1.0
160MHz
30
2.5
20
1.5
200MHz
40
2.0
15
1.5
HOW TO ORDER CX4SM AT CRYSTALS
CX4 -
S
-
C
Blank = glass lid
C = ceramic lid
-
SM1
-
32.0M,
Frequency
M = MHz
100
/ 100
–
/
I
'S' if special,
custom design.
Otherwise leave
blank
Terminations
SM1 = Gold plated *
SM2 = Solder plated
SM3 = Solder dipped
SM4 = Solder plated *
SM5 = Solder dipped *
* = Lead free
Frequency
Calibration
Tolerance Stability over
temperature
@25°C
(in ppm)*
(in ppm)*
Temp. Range
C = -10° ~ +70°C
I = -40° ~ +85°C
M = -55° ~ +125°C
S = Customer specified
*Alternative 'total' tolerance (in ppm)
EUROQUARTZ LIMITED Blacknell Lane CREWKERNE Somerset UK TA18 7HE
Tel: +44 (0)1460 230000 Fax: +44 (0)1460 230001 info@euroquartz.co.uk www.euroquartz.co.uk
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