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
CX18SM crystals are designed for applications where miniaturization
is paramount. The rugged crystal is ideally suited for a wide variety of
high frequency applications including medical electronics, cardiac
rhythm management, pacemakers for example. Also auitable for
cochlear implants, infusion pumps and wildlife tracking. Designed and
manufactured by Statek Inc.
FEATURES
Ultra-miniature SMD package 1.55 x 0.95 x 0.35mm
Frequency Range 30MHz ~ 50MHz
High shock and vibration resistance
Hermetically sealed
Available with glass or ceramic lid
Tight calibration tolerance
Custom designs available
CX18SM AT CRYSTAL
Ultra-Miniature SMD Crystal
30MHz to 50MHz
HOW TO ORDER CX18SM AT CRYSTALS
CX18 - S - _ - SM1 - 50.0M, 100 / 100 / - / I
'S' if special,
custom design.
Otherwise leave
blank
Blank = glass lid
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)*
*Alternative 'total' tolerance (in ppm)
CRYSTAL EQUIVALENT CIRCUIT
R1 Motional Resistance L1 Motional Inductance
C1 Motional Capacitance C0 Shunt Capacitance
PACKAGING OPTIONS
CX18SM AT crystals are available either tray packed (<250pcs) or
tape and reel (>250 pieces).
12mm tape, 178mm or 330mm reels (EIA 418).
SPECIFICATION
Standard Calibration Tolerance
1
: ±100ppm or tighter as required.
Load Capacitance: 10pF ( )
Drive Level: 200µW maximum
Frequency Stability
1,2
-10° to +70°C: ±50ppm to ±10ppm
-40° to +85°C: ±100ppm to ±20ppm
-55° to +125°C: ±100ppm to ±30ppm
Ageing, First Year: ±5ppm maximum
Shock, Survival: 5000g, 0.3ms, ½ sine
Vibration, Survival
3
: 20g 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
OUTLINE & DIMENSIONS
Terminations
SM1 = Gold plated *
SM2 = Solder plated
SM3 = Solder dipped
SM4 = Solder plated *
SM5 = Solder dipped *
* = Lead free
Fundamental Frequency: 50.0MHz
Motional Resistance R (Ω): 60
Motional Capacitance C1 (fF): 1.2
QualityFactor Q (k): 44
Shunt Capacitance C0 (pF): 0.6
SM1 0.35
SM2 0.37
SM3 0.42
SM4 0.37
SM5 0.42
Glass
Lid
Dim. H
TERMINATIONS - PLATING
SM1 Gold Plated (Lead Free)
SM2 Solder Plated
SM3 Solder Dipped
SM4 Solder Plated (Lead Free)
SM5 Solder Dipped (Lead Free)
Designation
Termination