QUARTZ
EURO
CX14SM AT CRYSTAL
Ultra-Miniature SMD Crystal
20MHz to 50MHz
FEATURES
Designed for infrared, vapour phase or epoxy mounting
Low profile, (<0.59mm) hermetically sealed ceramic
package
OUTLINE & DIMENSIONS
Excellent ageing characteristics
High shock and vibration resistance
Full military testing available
Available with glass or ceramic lid
DESCRIPTION
CX14SM crystals are designed for applications requiring very small
footprint and low profile (<0.59mm). Using micro-machining
processes this hermetically-sealed crystal ensures high stability and
low ageing.
SPECIFICATION
Specifications stated are typical at 25°C unless otherwise indicated.
Specifications may change without notice.
Fundamental Frequency:
Motional Resistance R (Ω):
Motional Capacitance C1 (fF):
26.0MHz 50.0MHz
20
25
3.5
3.0
QualityFactor Q (k):
80
40
Shunt Capacitance C0 (pF):
1.0
1.5
Ceramic
Lid
1
Glass
Lid
Thin Glass
Lid
Standard Calibration Tolerance : ±100ppm or tighter as required.
Dim. H
2
Load Capacitance :
Drive Level:
10pF (or as specified)
100µW maximum
SM1
SM2
SM3
SM4
SM5
0.63
0.65
0.67
0.65
0.67
0.59
0.61
0.63
0.61
0.63
0.52
0.54
0.56
0.54
0.56
1,3
Frequency Stability
-10° to +70°C:
±50ppm to ±10ppm
±100ppm to ±20ppm
±100ppm to ±30ppm
-40° to +85°C:
-55° to +125°C:
4
Ageing, First Year :
±5ppm maximum
(Better than ±1ppm available)
CRYSTAL EQUIVALENT CIRCUIT
5
Shock, Survival :
5000g, 0.3ms, ½ sine
6
Vibration, Survival :
20g rms, 10~2000Hz swept sine
-10°C to +70°C (Commercial)
-40°C to +85°C (Industrial)
-55°C to +125°C (Military)
-55° to +125°C
Operating Temperature Range:
Storage Temperature Range:
Maximum Process Temperature: +260°C for 20 seconds
R1 Motional Resistance
C1 Motional Capacitance
L1 Motional Inductance
C0 Shunt Capacitance
1.
2.
3.
Other tolerances available, contact Euroquartz sales
Unless specified otherwise.
Does not include calibration tolerance. (Frequency stability
characteristics follow that of the AT-Cut thickness-shear mode.)
5ppm maximum for frequencies below 40MHz. For tighter
tolerances and higher frequencies contact Euroquartz sales.
A higher shock version available.
4.
PACKAGING OPTIONS
5.
6.
CX14SM AT crystals are available either tray packed (<250pcs) or
tape and reel (>250 pieces).
12mm tape, 178mm or 330mm reels (EIA 418).
Per MIL-STD-202G, Method 204D, Condition D. Random
vibration testing also available.
HOW TO ORDER CX14SM AT CRYSTALS
CX14 - S
-
C
-
SM1 -
26.0M,
100 / 100 / - /
I
Calibration
Tolerance
@25°C
Frequency
Stability over
Temp. Range
(in ppm)*
Frequency
M = MHz
Blank = glass lid
C = ceramic lid
Terminations
'S' if special,
Temp. Range
SM1 = Gold plated *
SM2 = Solder plated
SM3 = Solder dipped
SM4 = Solder plated *
SM5 = Solder dipped *
* = Lead free
custom design.
Otherwise leave
blank
C = -10° ~ +70°C
I = -40° ~ +85°C
M = -55° ~ +125°C
S = Customer specified
(in ppm)*
*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