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
EURO
QUARTZ
DESCRIPTION
CX2SM AT crystals in leadless ceramic packages are designed for
surface mounting on PCB or hybrid substrates. The small footprint,
low profile crystal is ideal for a wide range of commercial, industrial,
medical and defence/aerospace applications.
OUTLINE & DIMENSIONS
FEATURES
Designed for surface mount applications, including
infrared, vapour phase or epoxy mount techniques
Hermetically sealed ceramic package
Excellent ageing characteristics
Available with glass or ceramic lid
Higjh shock and vibration resistance
Custom designs available
Full Military testing available
PACKAGING OPTIONS
CX2SM AT crystals are available either tray packed (<250pcs) or tape
and reel (>250 pieces).
16mm tape, 178mm or 330mm reels (EIA 418).
CX2SM AT CRYSTAL
Low Profile Miniature SMD Crystal
9.6MHz to 250MHz
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
Typ.
Max.
Dim.
SM1 1.65 1.91
SM2 1.70 1.96
SM3 1.78 2.03
SM4 1.70 1.96
SM5 1.78 2.03
Glass
Lid
Ceramic
Lid
Dim. C
HOW TO ORDER CX2SM AT CRYSTALS
CX2 - S - C - SM1 - 32.0M , 100 / 100 / - / I
'S' if special,
custom design.
Otherwise leave
blank
Blank = glass lid
C = ceramic lid
Terminations
SM1 = Gold plated *
SM2 = Solder plated
SM3 = Solder dipped
SM4 = Solder plated *
SM5 = Solder dipped *
* = Lead free
Frequency
M = MHz
Calibration
Tolerance
@25°C
(in ppm)
Temp. Range
C = -10° ~ +70°C
I = -40° ~ +85°C
M = -55° ~ +125°C
S = Customer specified
Frequency
Stability over
Temp. Range
(in ppm)
CRYSTAL EQUIVALENT CIRCUIT
R1 Motional Resistance L1 Motional Inductance
C1 Motional Capacitance C0 Shunt Capacitance
SPECIFICATION
Fundamental Frequency: 10.0MHz 32.0MHz 155.52MHz
Motional Resistance R (Ω): 60 25 10
Motional Capacitance C1 (fF): 2.8 6.2 4.0
QualityFactor Q (k): 95 30 30
Shunt Capacitance C0 (pF): 1.4 2.3 2.3
Calibration Tolerance1: ±100ppm or tighter as required
Load Capacitance2: 20pF for fr. <50MHz
10pF for fr. >50MHz
Drive Level: 500µW max. for fr. <50MHz
200µW max. for fr. <50MHz
Temperature Stability3
Commercial -10 ~ +60°C: ±50ppm to ±10ppm
Industrial -40 to +85°C: ±100ppm to ±20ppm
Military -55 to +125°C: ±100ppm to ±30ppm
Ageing, first year4: 5ppm max.
Better than ±1ppm is available
Shock, survival5: 3,000g, 0.3ms, ½ sine
Vibration, survival6: 20g, 10~2000Hz swept sine
Operating Temperature Range
Commercial: -10° to +70°C
Industrial: -40° to +85°C
Military: -55 to +125°C
Storage Temperature Range: -55° to +125°C
Maximum Process Temperature: +260°C for 20 seconds
Specifications stated are typical at 25°C unless otherwise indicated.
Specifications may change without notice.
1. Other tolerances available, contact Euroquartz sales.
2. Unless specified otherwise.
3. Does not include calibration tolerance. The characteristicsof the
frequency stability over temperature follow that of the AT thickness-
shear mode.
4. 5ppm max. for frequencies below 40MHz For tighter tolerances
and higher frequencies contact Euroquartz sales.
5. Higher shock version available. See CX1HGSM
6. Per MIL-STD-202G, Method 204D, Condition D. Random vibration
testing also available.
